OpenAI is preparing to add an invisible watermark to text generated by ChatGPT and Codex in the European Union, bringing a major change to how AI-written content can be identified.&nbsp;The watermark is being introduced to comply with the transparency requirements of the EU AI Act. Unlike a visible label, it will not appear as a symbol or warning to readers. Instead, OpenAI will subtly influence word choices in generated text, creating a hidden pattern that specialised detection systems can identify. The company said the feature will begin rolling out to eligible ChatGPT and Codex users on all plans in the EU over the coming weeks.<h2>How does OpenAI's invisible watermark work?</h2>OpenAI's system, called textGrain, works inside the generated text itself. In simple terms, the model makes small, controlled changes to its word-selection process. When enough of these changes are combined, a detector with access to the relevant key can look at the text and identify the hidden pattern. Because the watermark is embedded in the words, it can remain attached when users copy and paste the text elsewhere. OpenAI said the watermark does not identify the person who generated the content. It also reported no meaningful impact on model performance when the system was enabled.<h2>Can the ChatGPT watermark be removed?</h2>This is where the technology has an important limitation. OpenAI's own tests found that editing can make the watermark harder to detect. Replacing just 10 per cent of words with synonyms reduced detection from about 92 per cent to 66 per cent in one test. Short passages, mathematical answers and translated text can also be more difficult to identify. That means a failure to detect the watermark does not prove that a person wrote the text. OpenAI will initially give detector access only to approved researchers and expert organisations to assess its reliability and responsible uses.<h2>Why is OpenAI doing this now?</h2>The change comes as AI-generated content becomes harder to distinguish from human writing and regulators push technology companies towards greater transparency. The EU's AI Act transparency rules took effect on August 2 and require AI-generated content to be marked in a way that other systems can identify.&nbsp;OpenAI said the watermark will initially be limited to the EU rather than becoming a global default. Developers using OpenAI's API can also enable the technology for selected models worldwide, although it is switched off by default. The move follows Anthropic's decision to watermark Claude-generated text worldwide. OpenAI had reportedly developed a similar system previously but delayed releasing it amid concerns that users might move to competing AI services without watermarks.

OpenAI will introduce an invisible watermark for ChatGPT and Codex text in the EU to meet AI Act transparency rules. The hidden pattern can be detected by specialised systems, but OpenAI says editing, short text and translation can make detection less reliable.

OpenAI is preparing to add an invisible watermark to text generated by ChatGPT and Codex in the European Union, bringing a major change to how AI-written content can be identified. The watermark is being introduced to comply with the transparency requirements of the EU AI Act. Unlike a visible label, it will not appear as a symbol or warning to readers. Instead, OpenAI will subtly influence word choices in generated text, creating a hidden pattern that specialised detection systems can identify. The company said the feature will begin rolling out to eligible ChatGPT and Codex users on all plans in the EU over the coming weeks. How does OpenAI's invisible watermark work? OpenAI's system, called textGrain, works inside the generated text itself. In simple terms, the model makes small, controlled changes to its word-selection process. When enough of these changes are combined, a detector with access to the relevant key can look at the text and identify the hidden pattern. Because the watermark is embedded in the words, it can remain attached when users copy and paste the text elsewhere. OpenAI said the watermark does not identify the person who generated the content. It also reported no meaningful impact on model performance when the system was enabled. Can the ChatGPT watermark be removed? This is where the technology has an important limitation. OpenAI's own tests found that editing can make the watermark harder to detect. Replacing just 10 per cent of words with synonyms reduced detection from about 92 per cent to 66 per cent in one test. Short passages, mathematical answers and translated text can also be more difficult to identify. That means a failure to detect the watermark does not prove that a person wrote the text. OpenAI will initially give detector access only to approved researchers and expert organisations to assess its reliability and responsible uses. Why is OpenAI doing this now? The change comes as AI-generated content becomes harder to distinguish from human writing and regulators push technology companies towards greater transparency. The EU's AI Act transparency rules took effect on August 2 and require AI-generated content to be marked in a way that other systems can identify. OpenAI said the watermark will initially be limited to the EU rather than becoming a global default. Developers using OpenAI's API can also enable the technology for selected models worldwide, although it is switched off by default. The move follows Anthropic's decision to watermark Claude-generated text worldwide. OpenAI had reportedly developed a similar system previously but delayed releasing it amid concerns that users might move to competing AI services without watermarks.

OpenAI will introduce an invisible watermark for ChatGPT and Codex text in the EU to meet AI Act transparency rules. The hidden pattern can be detected by specialised systems, but OpenAI says editing, short text and translation can make detection less reliable.

OpenAI reveals new way to detect ChatGPT text without visible labels

India is emerging as one of the fastest-growing markets for OpenAI's AI-powered coding agent Codex, highlighting the country's expanding role in the global artificial intelligence ecosystem.According to OpenAI, weekly active Codex users in India have increased 27 times since the beginning of 2026, while daily interactions with the platform have grown more than 20-fold. The company shared the figures during Mumbai Tech Week, pointing to growing demand for AI tools among developers, startups, students and businesses. The latest data suggests that India is no longer just a major consumer of digital technology but is increasingly becoming an important market for advanced AI adoption.<h2>India enters OpenAI's top markets for Codex</h2>OpenAI said India now ranks among its top five countries globally for Codex adoption. The country is also among the top ten markets worldwide for user engagement on the platform. The figures underline the speed at which AI tools are being integrated into daily work across sectors. Thomas Jeng, OpenAI's Head of Startups for Asia-Pacific, said the growth is not limited to software engineers."What’s exciting about India is that adoption is not just happening among software engineers. We’re seeing founders, operators, researchers, students and business teams increasingly use Codex to turn ideas into working outcomes faster," he said. According to OpenAI, India's strong developer ecosystem and growing startup culture are helping drive the rapid increase in usage.<h2>Codex is now being used for more than coding</h2>Although Codex was originally designed as an AI coding assistant, OpenAI says Indian users are increasingly using it for tasks beyond software development. The company revealed that more than 25 per cent of Codex requests from India are now related to non-coding activities.These include:Research and information gatheringDrafting documents and reportsWorkflow automationCommunication managementOrganising business processesThe shift reflects a broader trend across the AI industry, where users are increasingly treating AI tools as productivity assistants rather than specialised coding software. Industry experts say businesses are beginning to explore how AI can support a wide range of tasks across operations, marketing, research and administration.<h2>India's developer ecosystem continues to stand out</h2>OpenAI's latest findings build on data from its earlier OpenAI Signals report released in February. According to the company, coding-related usage of Codex in India was approximately three times higher than the global average. Coding queries from Indian users were also around three times the global median. These figures highlight India's position as one of the world's largest developer communities. The country produces hundreds of thousands of engineering graduates every year and has become a major hub for software development, technology services and startup innovation. OpenAI believes this foundation is helping accelerate the adoption of advanced AI tools such as Codex.<h2>Startups and enterprises are driving adoption</h2>Beyond individual users, businesses are also increasing their use of AI-powered software development tools. OpenAI said growing enterprise interest is contributing to Codex adoption across India. Companies are increasingly exploring AI systems to improve software development, automate repetitive work and increase productivity.The company has previously announced collaborations involving Codex with major Indian firms including Tata Consultancy Services, Infosys and Razorpay. These partnerships focus on software engineering support, workflow automation and enterprise productivity applications.<h2>What does this mean for India's AI future?</h2>The rapid growth of Codex usage reflects a larger shift taking place across India's technology landscape. While developers remain an important user group, AI tools are increasingly being adopted by founders, students, researchers, business operators and professionals across different industries.Many organisations are now viewing AI as a productivity tool that can help accelerate work, reduce repetitive tasks and support decision-making. OpenAI believes India's combination of technical talent, startup activity and digital adoption makes it one of the most important markets for future AI growth.

India is emerging as one of the fastest-growing markets for OpenAI's AI-powered coding agent Codex, highlighting the country's expanding role in the global artificial intelligence ecosystem.


India is emerging as one of the fastest-growing markets for OpenAI's AI-powered coding agent Codex, highlighting the country's expanding role in the global artificial intelligence ecosystem. According to OpenAI, weekly active Codex users in India have increased 27 times since the beginning of 2026, while daily interactions with the platform have grown more than 20-fold. The company shared the figures during Mumbai Tech Week, pointing to growing demand for AI tools among developers, startups, students and businesses. The latest data suggests that India is no longer just a major consumer of digital technology but is increasingly becoming an important market for advanced AI adoption. India enters OpenAI's top markets for Codex OpenAI said India now ranks among its top five countries globally for Codex adoption. The country is also among the top ten markets worldwide for user engagement on the platform. The figures underline the speed at which AI tools are being integrated into daily work across sectors. Thomas Jeng, OpenAI's Head of Startups for Asia-Pacific, said the growth is not limited to software engineers. "What’s exciting about India is that adoption is not just happening among software engineers. We’re seeing founders, operators, researchers, students and business teams increasingly use Codex to turn ideas into working outcomes faster," he said. According to OpenAI, India's strong developer ecosystem and growing startup culture are helping drive the rapid increase in usage. Codex is now being used for more than coding Although Codex was originally designed as an AI coding assistant, OpenAI says Indian users are increasingly using it for tasks beyond software development. The company revealed that more than 25 per cent of Codex requests from India are now related to non-coding activities. These include: Research and information gathering Drafting documents and reports Workflow automation Communication management Organising business processes The shift reflects a broader trend across the AI industry, where users are increasingly treating AI tools as productivity assistants rather than specialised coding software. Industry experts say businesses are beginning to explore how AI can support a wide range of tasks across operations, marketing, research and administration. India's developer ecosystem continues to stand out OpenAI's latest findings build on data from its earlier OpenAI Signals report released in February. According to the company, coding-related usage of Codex in India was approximately three times higher than the global average. Coding queries from Indian users were also around three times the global median. These figures highlight India's position as one of the world's largest developer communities. The country produces hundreds of thousands of engineering graduates every year and has become a major hub for software development, technology services and startup innovation. OpenAI believes this foundation is helping accelerate the adoption of advanced AI tools such as Codex. Startups and enterprises are driving adoption Beyond individual users, businesses are also increasing their use of AI-powered software development tools. OpenAI said growing enterprise interest is contributing to Codex adoption across India. Companies are increasingly exploring AI systems to improve software development, automate repetitive work and increase productivity. The company has previously announced collaborations involving Codex with major Indian firms including Tata Consultancy Services, Infosys and Razorpay. These partnerships focus on software engineering support, workflow automation and enterprise productivity applications. What does this mean for India's AI future? The rapid growth of Codex usage reflects a larger shift taking place across India's technology landscape. While developers remain an important user group, AI tools are increasingly being adopted by founders, students, researchers, business operators and professionals across different industries. Many organisations are now viewing AI as a productivity tool that can help accelerate work, reduce repetitive tasks and support decision-making. OpenAI believes India's combination of technical talent, startup activity and digital adoption makes it one of the most important markets for future AI growth.

India is emerging as one of the fastest-growing markets for OpenAI's AI-powered coding agent Codex, highlighting the country's expanding role in the global artificial intelligence ecosystem.

‘India's AI boom’: OpenAI reports 27-fold growth in Codex users

OpenAI has introduced GPT-5.2 Codex, a new version of its AI model designed specifically for coding tasks. The model focuses on improving how AI systems write, understand, and manage code over long and complex projects. The update was announced on OpenAI’s official website, where the company said GPT-5.2 Codex is built to work more reliably as an AI coding agent rather than just a text generator.

<blockquote class="twitter-tweet">Meet GPT-5.2-Codex, the best agentic coding model yet for complex, real-world software engineering. With native compaction, better long-context understanding, and improved tool-calling, it is a more dependable partner for your hardest tasks. Available in Codex starting today.…&mdash; OpenAI Developers (@OpenAIDevs) <a href="https://twitter.com/OpenAIDevs/status/2001723687373017313?ref_src=twsrc%5Etfw">December 18, 2025</a></blockquote> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

<h2>What is GPT-5.2 Codex?</h2>GPT-5.2 Codex is a specialised AI model trained to handle software development tasks such as:Writing new codeFixing bugsReviewing pull requestsManaging large codebasesUnlike general-purpose AI models, Codex is designed to follow instructions step by step and stay focused on coding goals for longer periods.OpenAI said this makes GPT-5.2 Codex more suitable for professional software workflows.<h2>What’s new&nbsp;</h2>OpenAI says GPT-5.2 Codex brings several technical improvements over earlier versions.According to the company’s release note:The model performs better on complex coding benchmarks It shows improved reasoning across long tasks It reduces common coding errors seen in earlier AI models&nbsp;OpenAI also stated that GPT-5.2 Codex scored 55.6 per cent on SWE-Bench Pro, a widely used benchmark that measures how well AI models solve real software engineering problems. This score is higher than previous Codex versions.Built for agent-based codingOne key focus of GPT-5.2 Codex is agent-based coding.OpenAI explained that the model can:Work on tasks for several hours without losing contextHandle multiple steps in a single coding jobOperate in sandboxed environments connected to real code repositoriesThis allows developers to assign tasks such as “fix this issue” or “add this feature” and review the results later.According to OpenAI, GPT-5.2 Codex is available through:&nbsp;ChatGPT Command-line tools Integrated development environments (IDEs)<h2>Why OpenAI sees coding as a key use case</h2>OpenAI said coding is one area where AI tools are already showing strong real-world value.The company noted that software development:Has clear rulesAllows easy testing and verificationBenefits from automationBecause of this, AI models like Codex can assist developers without fully replacing human oversight. OpenAI added that humans remain responsible for reviewing and approving code.<h2>What happens next</h2>GPT-5.2 Codex is part of OpenAI’s broader plan to improve AI-assisted software development.According to the company, future updates will focus on:Faster task completionBetter understanding of large projectsSafer deployment in real-world systemsOpenAI said it will continue testing the model with developers and expand access gradually.&nbsp;

OpenAI has launched GPT-5.2 Codex, a specialised AI model built for coding tasks. Designed as a reliable AI coding agent, it handles long, complex projects, reduces errors, and performs better on real-world software benchmarks.

OpenAI has introduced GPT-5.2 Codex, a new version of its AI model designed specifically for coding tasks. The model focuses on improving how AI systems write, understand, and manage code over long and complex projects. The update was announced on OpenAI’s official website, where the company said GPT-5.2 Codex is built to work more reliably as an AI coding agent rather than just a text generator.

OpenAI has launched GPT-5.2 Codex, a specialised AI model built for coding tasks. Designed as a reliable AI coding agent, it handles long, complex projects, reduces errors, and performs better on real-world software benchmarks.

OpenAI launches GPT-5.2 Codex: How OpenAI is building a smarter AI coding agent

OpenAI is using an AI coding agent and they also uses it to improve the agent itself. It is being revealed that its artificial intelligence coding agent, Codex, is now responsible for building most of its own software. The disclosure marks an important moment in how AI tools are being used to improve themselves.According to Alexander Embiricos, who is product lead for Codex at OpenAI, the system is now “almost entirely being used to improve itself”. He shared this information in an interview with Ars Technica this week.<h2>What is Codex and what does it do?</h2>Codex is a cloud-based AI software engineering agent launched by OpenAI in May 2025. It is designed to help developers with tasks such as:Writing new featuresFixing bugsReviewing codeSuggesting pull requestsThe tool works in secure sandboxed environments connected to a user’s code repository and can run multiple tasks at the same time.&nbsp;OpenAI offers Codex through:ChatGPT’s web interfaceA command-line tool (CLI)IDE extensions for VS Code, Cursor and WindsurfOpenAI says Codex is now deeply integrated into its own development process.According to the company:More than 92 per cent of OpenAI’s technical staff use CodexCodex reviews every internal pull requestEngineers using Codex ship around 70 per cent more merged pull requestsCodex catches bugs before they reach productionAt OpenAI DevDay 2025, the company revealed that Codex wrote 80 per cent of the Agent Builder tool in less than six weeks.This information was shared by OpenAI during public events and interviews.<h2>How Codex helps improve itself</h2>Codex is powered by codex-1, a specialised version of OpenAI’s o3 reasoning model, trained using reinforcement learning on coding tasks.OpenAI later released:GPT-5-Codex in September 2025, designed for long, independent coding sessionsGPT-5.1-Codex-Max, released in early December via GitHub CopilotAccording to OpenAI, Codex can now:Monitor its own training runsReview user feedbackHelp decide what features to build nextOpenAI employees can assign tasks to Codex using the same tools they use for human colleagues, such as Linear and Slack.Faster development with AI “teammates”One example shared by OpenAI was the Sora Android app.According to Embiricos: The app was built by four engineers It took 18 days to build and 28 days to ship. Codex helped plan the architecture and write codeOpenAI says Codex acts like a junior developer, working under human supervision. Engineers review all code before it is merged.<h2>Competition in AI coding tools</h2>OpenAI faces strong competition in the AI coding space from:Anthropic’s Claude CodeGitHub CopilotGoogle’s Gemini CLIStartups like CursorOn benchmarks, OpenAI says its latest models show improvement.According to company data, GPT-5.2 scored 55.6 per cent on SWE-Bench Pro, higher than earlier versions and some competitors.<h2>Will AI coding tools replace developers?</h2>OpenAI says Codex is designed to support developers, not replace them.According to Embiricos, humans remain in control:Developers review all codeAI is used for speed and assistanceFinal decisions stay with peopleOpenAI believes coding agents could eventually help even non-programmers, but says human oversight will remain important.

OpenAI coding agent Codex is now helping build and improve most of its own software. Used daily by engineers, Codex writes code, reviews pull requests, and speeds up development, showing how AI tools are starting to improve themselves.

OpenAI is using an AI coding agent and they also uses it to improve the agent itself. It is being revealed that its artificial intelligence coding agent, Codex, is now responsible for building most of its own software. The disclosure marks an important moment in how AI tools are being used to improve themselves. According to Alexander Embiricos, who is product lead for Codex at OpenAI, the system is now “almost entirely being used to improve itself”. He shared this information in an interview with Ars Technica this week. What is Codex and what does it do? Codex is a cloud-based AI software engineering agent launched by OpenAI in May 2025. It is designed to help developers with tasks such as: Writing new features Fixing bugs Reviewing code Suggesting pull requests The tool works in secure sandboxed environments connected to a user’s code repository and can run multiple tasks at the same time. OpenAI offers Codex through: ChatGPT’s web interface A command-line tool (CLI) IDE extensions for VS Code, Cursor and Windsurf OpenAI says Codex is now deeply integrated into its own development process. According to the company: More than 92 per cent of OpenAI’s technical staff use Codex Codex reviews every internal pull request Engineers using Codex ship around 70 per cent more merged pull requests Codex catches bugs before they reach production At OpenAI DevDay 2025, the company revealed that Codex wrote 80 per cent of the Agent Builder tool in less than six weeks. This information was shared by OpenAI during public events and interviews. How Codex helps improve itself Codex is powered by codex-1, a specialised version of OpenAI’s o3 reasoning model, trained using reinforcement learning on coding tasks. OpenAI later released: GPT-5-Codex in September 2025, designed for long, independent coding sessions GPT-5.1-Codex-Max, released in early December via GitHub Copilot According to OpenAI, Codex can now: Monitor its own training runs Review user feedback Help decide what features to build next OpenAI employees can assign tasks to Codex using the same tools they use for human colleagues, such as Linear and Slack. Faster development with AI “teammates” One example shared by OpenAI was the Sora Android app. According to Embiricos: The app was built by four engineers It took 18 days to build and 28 days to ship. Codex helped plan the architecture and write code OpenAI says Codex acts like a junior developer, working under human supervision. Engineers review all code before it is merged. Competition in AI coding tools OpenAI faces strong competition in the AI coding space from: Anthropic’s Claude Code GitHub Copilot Google’s Gemini CLI Startups like Cursor On benchmarks, OpenAI says its latest models show improvement. According to company data, GPT-5.2 scored 55.6 per cent on SWE-Bench Pro, higher than earlier versions and some competitors. Will AI coding tools replace developers? OpenAI says Codex is designed to support developers, not replace them. According to Embiricos, humans remain in control: Developers review all code AI is used for speed and assistance Final decisions stay with people OpenAI believes coding agents could eventually help even non-programmers, but says human oversight will remain important.

OpenAI coding agent Codex is now helping build and improve most of its own software. Used daily by engineers, Codex writes code, reviews pull requests, and speeds up development, showing how AI tools are starting to improve themselves.

OpenAI’s coding agent Codex now writes the majority of its own code under developer supervision

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OpenAI reveals new way to detect ChatGPT text without visible labels

‘India's AI boom’: OpenAI reports 27-fold growth in Codex users

OpenAI launches GPT-5.2 Codex: How OpenAI is building a smarter AI coding agent

OpenAI says its AI coding agent Codex now builds most of itself