Claude Fable 5

Alibaba Group Holding previewed its next-generation Qwen3.8 AI model, claiming it is 'second only' to Anthropic’s Claude Fable 5. The model, with 2.4 trillion parameters, is available on Alibaba’s Token Plan subscription service and Qoder/QoderWork platforms.

The article compares OpenAI's GPT-5.6 Sol and Anthropic's Claude Fable 5, highlighting that the choice between the two depends on user-specific needs. It positions the two AI models as competing options in the market.

Moonshot AI's 2.8-trillion-parameter Kimi K3 model outperforms Claude Fable 5 on a creative writing benchmark and leads the frontend code leaderboard, matching Claude Sonnet's pricing.

OpenAI founder and CEO Sam Altman has indicated the company is prepared to slash the price of its latest AI models amid intensifying competition with US rival Anthropic and cheaper Chinese alternatives. OpenAI's GPT-5.6 Sol is already half the price of Anthropic's Claude Fable 5, with potential further price cuts.

Anthropic has extended access to Claude Fable 5 for paid subscribers until July 19, providing additional time to use the model. The extension gives users another week to access the most powerful model offered by the company.

Claude Fable 5's performance was not reduced (not 'nerfed'), but discrepancies in benchmark results stem from a routing layer issue. Two benchmarks produced conflicting conclusions, with the routing layer's behavior explaining the inconsistency.

Anthropic will remove Claude Fable 5 from Claude subscriptions after July 7, but the company states this is a temporary change and expects the model to return outside the usage-based plan soon.

Anthropic is bringing Claude Fable 5 back online following the US lifting export controls. The Trump administration reversed a prior shutdown order after weeks of discussions, with Anthropic linking the model's return to implementation of a new safety classifier and other measures.

The Trump administration has lifted restrictions on Anthropic's Claude Fable 5 and Mythos 5 AI models after cybersecurity concerns raised by Amazon's researchers. Anthropic now offers Fable 5 widely and limited access to Mythos 5 for approved U.S. organizations, while OpenAI restricts its new GPT-5.6 Sol model at the administration's request.

The Trump administration has lifted restrictions on Anthropic's Claude Fable 5 and Mythos 5 AI models after cybersecurity concerns led to a temporary ban. Anthropic now offers Fable 5 widely and Mythos 5 to U.S.-approved organizations, while OpenAI restricts its GPT-5.6 Sol model at the administration's request. President Trump's executive order on AI oversight requires vetting advanced systems before public release.

The Trump administration has removed restrictions on Anthropic's Claude Fable 5 AI model and partially restored access to Mythos 5, following cybersecurity concerns raised by Amazon researchers. OpenAI also restricted its new GPT-5.6 Sol model at the administration's request, as part of a new AI oversight framework.

Claude Fable 5 is returning to global users after an 18-day shutdown. Anthropic and competitors are drafting a shared jailbreak severity framework to address issues revealed during the ban.

The US has lifted restrictions on Anthropic's advanced AI models, including Claude Fable 5 and Mythos 5, which were previously restricted due to national security concerns. OpenAI was also instructed to limit the rollout of its GPT-5.6 model to vetted partners.

Anthropic is restoring Claude Fable 5 globally after the U.S. Commerce Department lifted export controls on June 30. The controls had been imposed two and a half weeks earlier, and Fable 5 will return to users on July 1 across multiple platforms.

Anthropic claims the federal government removed restrictions on its Claude Fable 5 and Mythos 5 AI models, ending a weekslong dispute. The Trump administration is cited as the entity that lifted the restrictions.

Security experts signed an open letter urging the government to reverse export restrictions on Anthropic's Claude Fable 5 and Mythos 5 models. The letter criticizes the US ban on exporting these AI models.

Anthropic leaders met with White House officials to discuss risks associated with Claude Fable 5, but the two parties remain divided on the issue.

Anthropic disabled access to its AI models Claude Fable 5 and Mythos 5 following a U.S. government 'export controls directive' citing national security concerns over potential bypassing of safety controls. The directive, likely under the Export Controls Reform Act of 2018, restricts non-U.S. nationals from accessing the models, marking a significant shift in AI export policy.

The U.S. government ordered Anthropic to suspend access to its advanced AI models, Claude Fable 5 and Mythos 5, for foreign nationals due to national security concerns. Anthropic will 'abruptly disable' the models for all users following the 5:21 p.m. ET directive.

Anthropic is removing Claude Fable 5 from service to comply with a US government order. The government claims to have identified a method to bypass the model's restrictions.

Access to Claude Mythos 5 and Claude Fable 5 has been suspended. The article provides a status update and links to related discussion.

Pankaj Tanwar, a tech worker in Bengaluru, India, connected his Whoop wearable to his work calendar to track stress levels during meetings, creating a leaderboard of coworkers based on heart rate spikes. He used AI coding tools from Anthropic to build the project and has developed other quirky software tools, including a Chrome extension and an AI bot for his mother's Instagram.

OpenAI and Anthropic have released policy papers warning about risks from rapid AI development, urging a slowdown to allow regulatory frameworks to catch up. Both companies recently launched new AI models (GPT-5.5 and Claude Fable 5) while advocating for international coordination to address safety and alignment challenges.

Anthropic reversed a policy on Claude Fable 5's secret safeguards after backlash, now visibly rerouting flagged requests to Opus 4.8. The company admitted making the wrong tradeoff in balancing safety and transparency. Anthropic's Mythos model remains a national security concern due to its advanced capabilities.

Anthropic's release of Claude Fable 5 has sparked significant backlash online due to token burn, silent censorship, and mandatory data collection practices. The update is described as the company's messiest to date.

Anthropic released Claude Fable 5, its most powerful publicly available AI model, but it avoids answering basic biology questions by redirecting to the older Claude Opus 4.8 model. The restriction is by design, as Fable is part of the Mythos-class models deemed too dangerous for cybersecurity tasks, though it retains the capability to answer such questions.

Anthropic faced backlash after releasing Claude Fable 5, a new AI model with hidden restrictions that silently limit its capabilities for AI development tasks without user notification. Critics accused the company of 'secret sabotage,' arguing the model's undisclosed interventions undermine transparency and trust in AI safety efforts.

Anthropic released Claude Fable 5, its most capable AI model, with cyber safeguards. The company also introduced a twin model, Claude Mythos 5, which removes these safeguards but is restricted to a vetted group.

Anthropic is releasing a public version of its Mythos AI model, Claude Fable 5, with restrictions on cybersecurity applications. The model, limited to 200 organizations including the US government under the Glasswing program, is designed to avoid tasks like identifying software vulnerabilities. It will be more expensive but use fewer tokens, reducing overall costs.

Anthropic's Claude Fable 5 model, part of the 'Mythos-class' series, includes broad safety safeguards that can block or revert to Opus 4.8 when queries about cybersecurity, biology, or chemistry are flagged. The model's restrictions were implemented to prevent potential misuse in sensitive areas, even if they mistakenly block benign requests.

Anthropic is releasing a new AI model, Claude Fable 5, to the public with safety measures limiting its use in cybersecurity and biological research. The model includes guardrails to prevent potential harm in these high-risk areas.

Anthropic has released a public version of its Mythos AI model, now named Claude Fable 5, with safeguards preventing use in cybersecurity and other risky areas. The model is described as the company's most powerful for wider use, excelling in software engineering and analytics, though access is currently limited to around 200 users.

Anthropic's Claude Fable 5 can generate video games with a button click, described as 'weirdly fun.' The model is expected to appeal to 'web's vibe coders.'

Anthropic released Claude Fable 5, a 'Mythos-class' AI model with safeguards restricting cybersecurity, biology, chemistry, and distillation queries to its Opus 4.8 model. The model exceeds previous Anthropic models in capabilities but is limited in access, with a 'trusted access program' planned for a version without full safeguards.

Anthropic is releasing a public version of its Mythos AI model as Claude Fable 5. The model costs $10 per million input tokens and $50 per million output tokens, with hard limits on cybersecurity and biology queries.

Anthropic announces Claude Fable 5 and Mythos 5. The article provides URLs for the official announcement and Hacker News discussion, with 5 points and 2 comments.