<p>Anthropic has launched Claude Opus 5, promising users near-frontier AI intelligence without paying the company's highest price. Released on July 24, Opus 5 is designed for everyday professional work, including software development, research and complex tasks. Anthropic says the model comes close to the intelligence of its more powerful Claude Fable 5 at half the price.</p><p>The launch also shows where the AI race is heading. Companies are no longer competing only to build the smartest model. They increasingly need models that can deliver strong performance without making every task prohibitively expensive.</p>

<blockquote class="twitter-tweet"><p lang="en" dir="ltr">Introducing Claude Opus 5.<br><br>It&#39;s a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at half the price. <a href="https://t.co/GQWhcq2CQL">pic.twitter.com/GQWhcq2CQL</a></p>&mdash; Claude (@claudeai) <a href="https://x.com/claudeai/status/2080699495453528290?ref_src=twsrc%5Etfw">July 24, 2026</a></blockquote> <script async src="https://platform.x.com/widgets.js" charset="utf-8"></script>

<h2>Claude Opus 5: What has changed?</h2><p>Opus 5 costs the same as its predecessor, Opus 4.8, but Anthropic says it delivers significantly better performance. On coding and knowledge-work evaluations including Frontier-Bench and GDPval-AA, Anthropic says Opus 5 has reached state-of-the-art performance. It is also designed to use computing resources more efficiently, reducing the cost of completing many tasks. The model can adjust how much effort it spends on a problem. Users can therefore favour deeper reasoning for difficult work or use fewer tokens when speed and cost matter more. Opus 5 also has a Fast mode, which Anthropic says operates around 2.5 times faster than its standard mode.</p><h2><strong>Opus 5 or Fable 5: Which should you use?</strong></h2><p>Anthropic is not positioning Opus 5 as a replacement for Fable 5. Dianne Penn, an Anthropic product leader, told Reuters that users should choose Opus 5 for value, while Fable 5 remains better suited to highly autonomous projects that could continue for days.</p><p>That distinction could matter to businesses. Everyday coding and office tasks may not need the company's most expensive frontier model. Anthropic says Opus 5 is now the default model for Claude Max users and the strongest model available to Claude Pro subscribers. It is also available through the Claude API.</p><h2>Anthropic says Opus 5 is safer, too</h2><p>There is another notable difference. Opus 5 remains behind Anthropic's Mythos 5 on cybersecurity tasks. Reuters reports that it was less capable of exploiting cyber vulnerabilities than Fable 5, allowing Anthropic to deploy it with less restrictive cyber safeguards. Anthropic also says its automated behavioural testing found Opus 5 to be its most aligned model so far, with lower rates of problematic behaviour. The bigger story, however, is economics. If AI models approaching frontier-level performance can become significantly cheaper, businesses may not always need the most powerful model available. For Anthropic, Opus 5 is its bet that the next stage of the AI race will be fought not just over intelligence, but over how much useful intelligence customers can get for their money.</p>

Anthropic has launched Claude Opus 5, an AI model aimed at coding and everyday professional work. The company says it approaches Fable 5 intelligence at half the price, while offering stronger efficiency and major gains over Opus 4.8.

Anthropic has launched Claude Opus 5, promising users near-frontier AI intelligence without paying the company's highest price. Released on July 24, Opus 5 is designed for everyday professional work, including software development, research and complex tasks. Anthropic says the model comes close to the intelligence of its more powerful Claude Fable 5 at half the price. The launch also shows where the AI race is heading. Companies are no longer competing only to build the smartest model. They increasingly need models that can deliver strong performance without making every task prohibitively expensive.

<p>Anthropic has launched Claude Opus 5, an AI model aimed at coding and everyday professional work. The company says it approaches Fable 5 intelligence at half the price, while offering stronger efficiency and major gains over Opus 4.8.</p>

Anthropic launches Claude Opus 5 with near-Fable 5 intelligence at half the price

<p>Elon Musk has made a surprising admission in the rapidly evolving artificial intelligence race. In a post on X, the SpaceXAI founder acknowledged that he had underestimated Anthropic, saying the company is now "obviously currently the leader in AI."</p><p>The remark marks a sharp reversal from September last year, when Musk wrote that "winning was never in the set of possible outcomes for Anthropic."</p>

<blockquote class="twitter-tweet"><p lang="en" dir="ltr">I was clearly wrong about Anthropic. They are obviously currently the leader in AI. No company has released a model as good as Mythos/Fable and they will undoubtedly have Mythos 2 ready soon. <br><br>And I would never cut them off in a way that hurt them badly, even as a competitor.…</p>&mdash; Elon Musk (@elonmusk) <a href="https://x.com/elonmusk/status/2075278580955685036?ref_src=twsrc%5Etfw">July 9, 2026</a></blockquote> <script async src="https://platform.x.com/widgets.js" charset="utf-8"></script>

<p>Responding to a user who reposted his earlier prediction, Musk said: "I was clearly wrong about Anthropic. They are obviously currently the leader in AI." He also praised Anthropic's latest Claude Mythos and Claude Fable models, calling them the strongest AI systems released so far.</p><h2>Musk says no rival has matched Mythos</h2><p>Musk did not stop at recognising Anthropic's progress.</p><p>He wrote that "No company has released a model as good as Mythos/Fable and they will undoubtedly have Mythos 2 ready soon."</p><p>The comments are notable because they come shortly after SpaceXAI launched Grok 4.5, while OpenAI recently released GPT-5.6. Both companies have been competing aggressively with Anthropic in coding, reasoning and enterprise AI. Earlier this year, Anthropic's Mythos and Fable models faced temporary restrictions from US authorities over cybersecurity concerns before later returning with updated safeguards.</p><h2><strong>Rivals in AI, partners in computing</strong></h2><p>The relationship between Musk and Anthropic has become increasingly complex. Although the companies compete directly in artificial intelligence, Anthropic is also one of the largest customers of SpaceXAI's Colossus 1 supercomputer. According to previously reported details, Anthropic agreed to lease computing capacity worth about $1.25 billion per month through May 2029, making the overall agreement worth roughly $40 billion. The Colossus system reportedly contains more than 220,000 Nvidia GPUs with approximately 300 megawatts of computing capacity.</p><p>The arrangement has prompted speculation over whether Musk could use that leverage against a competitor.</p><p>"That's not my style"</p><p>Musk dismissed those suggestions. When one X user claimed he could effectively shut down Anthropic by ending the computing agreement, Musk replied that he would never cut them off in a way that hurt them badly, even though they are competitors. He pointed to Tesla's open-source patents and its decision to make the Supercharger network available to rival carmakers as examples of his approach to competition.</p><p>The episode also highlights another growing issue in the AI industry model distillation, where companies study rival AI systems to improve their own models. During his legal dispute with OpenAI, Musk acknowledged that AI companies generally learn from one another's models, while Anthropic has previously accused some Chinese AI developers of distilling Claude. Musk's latest comments suggest that despite fierce competition, he believes Anthropic currently sets the benchmark in frontier AI and that recognition has become difficult even for rivals to ignore.</p>

Elon Musk has admitted he was wrong about Anthropic, calling it the current AI leader and describing Claude Mythos and Fable as the best AI models available. His comments come despite SpaceXAI competing directly with Anthropic while also supplying it with massive computing power.

Elon Musk has made a surprising admission in the rapidly evolving artificial intelligence race. In a post on X, the SpaceXAI founder acknowledged that he had underestimated Anthropic, saying the company is now "obviously currently the leader in AI." The remark marks a sharp reversal from September last year, when Musk wrote that "winning was never in the set of possible outcomes for Anthropic."

<p>Elon Musk has admitted he was wrong about Anthropic, calling it the current AI leader and describing Claude Mythos and Fable as the best AI models available. His comments come despite SpaceXAI competing directly with Anthropic while also supplying it with massive computing power.</p>

Elon Musk admits, 'I was wrong,' says Anthropic is the AI leader and calls Mythos the best model ever

<p>Anthropic has restored global access to its advanced Claude Fable 5 and Claude Mythos 5 AI models after introducing a new set of cybersecurity safeguards. The move follows discussions with the US government and comes after the company temporarily restricted access to the models over concerns about potential misuse.</p><p>&nbsp;</p><p>The company says the updated safeguards are designed to prevent harmful cybersecurity activities while allowing legitimate users to continue using the models for coding, research and other everyday tasks. For most users, Anthropic says the experience should remain largely unchanged.</p><p>&nbsp;</p>

<blockquote class="twitter-tweet"><p lang="en" dir="ltr">Fable 5 is back. <a href="https://t.co/9RTGUCcPHy">pic.twitter.com/9RTGUCcPHy</a></p>&mdash; Claude (@claudeai) <a href="https://x.com/claudeai/status/2072402636813607381?ref_src=twsrc%5Etfw">July 1, 2026</a></blockquote> <script async src="https://platform.x.com/widgets.js" charset="utf-8"></script>

<h2><strong>Why did Anthropic bring Fable 5 back?</strong></h2><p>According to Anthropic, the company has improved its security systems to better distinguish between legitimate requests and potentially harmful ones. The new safeguards use updated classifiers that identify requests related to advanced cybersecurity misuse. If a request is flagged, users will receive a notification and the conversation will automatically switch to Claude Opus 4.8, rather than Fable 5.</p><p>&nbsp;</p><p>Anthropic says this approach allows it to continue offering powerful AI capabilities while reducing the risk of abuse.</p><p>&nbsp;</p><h2><strong>Will coding and everyday work be affected?</strong></h2><p>Anthropic says the vast majority of coding work will not be affected. However, the company acknowledged that the new safeguards may temporarily block a slightly higher number of harmless requests than intended. This means some legitimate coding or debugging prompts could be redirected to Opus 4.8 until the classifiers become more accurate.</p><p>The company said it is already working on updates to reduce these false positives over the coming weeks.</p><h2><strong>Biology and chemistry restrictions remain</strong></h2><p>Anthropic also confirmed that its biology and chemistry safety filters remain unchanged from the initial launch.</p><p>The company admitted that these classifiers are still broader than it would like. As a result, even some basic biology-related questions may currently fall back to Claude Opus 4.8 instead of Fable 5. Anthropic says improvements to these scientific safety systems are already being developed and will be introduced in future updates.</p><h2><strong>AI safety becomes a bigger industry focus</strong></h2><p>The return of Fable 5 and Mythos 5 reflects a wider shift across the AI industry, where companies are trying to balance powerful capabilities with stronger safety measures. Rather than limiting access entirely, Anthropic is introducing more targeted safeguards that aim to stop misuse while keeping advanced AI available for developers, researchers and businesses. The company says it will continue refining these protections as more users begin using the restored models.</p>

Anthropic has restored access to its Claude Fable 5 and Mythos 5 AI models after introducing updated cybersecurity safeguards. 

Anthropic has restored global access to its advanced Claude Fable 5 and Claude Mythos 5 AI models after introducing a new set of cybersecurity safeguards. The move follows discussions with the US government and comes after the company temporarily restricted access to the models over concerns about potential misuse. The company says the updated safeguards are designed to prevent harmful cybersecurity activities while allowing legitimate users to continue using the models for coding, research and other everyday tasks. For most users, Anthropic says the experience should remain largely unchanged.

<p>Anthropic has restored access to its Claude Fable 5 and Mythos 5 AI models after introducing updated cybersecurity safeguards.&nbsp;</p>

Fable 5 is available again, but with smarter safety checks: Here's what has changed for users

fable-5

Fable 5, News on Fable 5, stories on Fable 5, articles on Fable 5, Fable 5 stories at Wion, Fable 5 news, Fable 5 latest news

fable 5

Anthropic launches Claude Opus 5 with near-Fable 5 intelligence at half the price

Musk praises rival Anthropic, says no AI model matches Mythos and Fable

Fable 5 is available again, but with smarter safety checks