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AI 资讯

Inside the fight over Claude Mythos 5

As the rest of the country celebrated the USA's first World Cup win and the New York Knicks championship, Anthropic spent its weekend fighting the Trump administration over its latest model release. At 5:21 PM on Friday, the company received a US export control directive to suspend access to its Mythos 5 and Fable 5 […]

2026-06-16 原文 →
AI 资讯

Trump’s Anthropic shutdown just made the case for non-American AI

At Washington's request, Anthropic suddenly took its newest and most powerful AI models offline over the weekend. The American company said it had little choice after the White House demanded it block access for all foreign nationals, including its own employees. Abroad, the incident offered a sobering reminder that the US not only dominates frontier […]

2026-06-16 原文 →
AI 资讯

Anthropic Releases and Temporarily Suspends Claude Fable 5

On June 9, 2026, Anthropic launched Claude Fable 5, a model designed for long-horizon tasks, but it was taken offline shortly after due to a U.S. government export directive. It shares architecture with Claude Mythos 5, supporting extensive token usage. The model includes mandatory data retention requirements, which have affected its deployment with partners like Microsoft. By Andrew Hoblitzell

2026-06-15 原文 →
开发者

China may have accessed Mythos

According to a new report from Semafor, the White House's decision to impose export restrictions on Anthropic's Mythos was driven in part by fears that it had been accessed by a group linked to China. If the Chinese government actually had access to Mythos 5 or Fable 5, it would present a serious national security […]

2026-06-15 原文 →
AI 资讯

Claude Fable 5 Pulled by US Export Order — 72 Hours After Launch

Three days. Claude Fable 5 — Anthropic's most capable model ever shipped to the public, posting 95% on SWE-bench Verified — was live for exactly 72 hours before the US government issued an export control directive on June 12 that forced Anthropic to pull it globally. For everyone. Including US users. Including Anthropic employees who hold foreign passports. Here is what Fable 5 actually is, what the government directive says, what Anthropic says about it, and what developers building on Claude should do while this gets resolved. What Claude Fable 5 Is Anthropic launched Claude Fable 5 on June 9, 2026, alongside Claude Mythos 5, its restricted sibling for government-adjacent cybersecurity work. Fable 5 is the first publicly available model in Anthropic's new "Mythos-class" tier — a category above the previous frontier that Claude Opus 4.8 (released May 28) occupied. The benchmark gap is not close. Fable 5 posted 95.0% on SWE-bench Verified and 80.3% on SWE-bench Pro. The next best competitor on SWE-bench Pro is GPT-5.5, sitting at 58.6%. That is a 21.7-point gap — roughly twice the margin by which Claude Opus 4.8 led its generation. Across all eight coding benchmarks Anthropic published at launch, Fable 5 led with an average margin of 11.8 points: Benchmark Claude Fable 5 Next Best Gap | SWE-bench Verified | 95.0% | ~74% | +21 | | SWE-bench Pro | 80.3% | 58.6% (GPT-5.5) | +21.7 | | FrontierCode Diamond | leads | baseline | +23.6 | | HLE (no tools) | leads | baseline | +13.7 | | Terminal-Bench | leads | baseline | +4.6 | Beyond static benchmarks, Anthropic ran a long-horizon game-playing evaluation using Slay the Spire with persistent file-based memory. Fable 5 improved three times faster than Opus 4.8 as memory accumulated, and reached the final act three times as often. The large-context reasoning advantage — the same capability that powered the 8x engineering productivity multiplier at Anthropic — is structurally more pronounced in Fable 5 than in any previous publ

2026-06-14 原文 →
AI 资讯

SpaceX, Anthropic, and OpenAI’s hot IPO summer

The IPO market is back, and it’s not the same companies leading the charge. FAANG had a good run, but a new acronym is taking over: MANGOS — Meta (or Microsoft, depending on who you ask), Anthropic, Nvidia, Google, OpenAI, and SpaceX. Half of that bunch is heading to public markets in the same window, and it’s a stress test for investors, for valuations, and for […]

2026-06-13 原文 →
AI 资讯

Anthropic apologizes for invisible Claude Fable guardrails

Anthropic has apologized for stealthily throttling its new AI model, Claude Fable 5, with hidden guardrails that undermine both researchers and rivals using it to develop competing systems. The company says it is reversing course and will be more transparent about when the restrictions kick in, even if that means Fable refuses more queries. Fable […]

2026-06-11 原文 →