Yes there's 2 separate pieces: 1) if apparently doing cyber sec stuff, downgrade to opus and warn; 2) if apparently trying to improve frontier LLMs, silently sabotage the work. (That 2nd one reads like an insane conspiracy theory! But it's actually documented by Anthropic.)
BIG TECH
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Concentration of power, capabilities, wealth in AI: open source needed
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The concentration of power, capabilities, and economic wealth is the greatest risk in AI. We need open science and open source more than ever!
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Claude Fable 5 Hints Future AI Competition Key Is Capability Boundary Design
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Claude Fable 5 这次最值得看，不只是“更强模型发布”。
— 艾略特 (@elliotchen100) 10 juin 2026
而是 Anthropic 开始把最前沿能力拆成两层：大众可用的 Fable，加安全分类器；受信任场景里的 Mythos，开放更少限制。
AI 产品接下来竞争的关键，可能会从“谁的模型最强”，变成“谁能把能力、风险和分发边界设计清楚”。 https://t.co/t8vlcSB4KVClaude Fable 5 is the most noteworthy this time, not just because of a 'stronger model release'.
Rather, it's that Anthropic has started splitting cutting-edge capabilities into two layers: Fable, available to the public with a safety classifier; and Mythos, used in trusted scenarios with fewer restrictions.
The key to future AI product competition may shift from 'whose model is strongest' to 'who can clearly design the boundaries of capabilities, risks, and distribution'. -
Disappointment at Anthropic’s silent degradation of Fable 5
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As advocates of open research, we are disappointed to see Anthropic silently degrading Fable 5 for AI development. "Any topic related to building pre-training pipelines, distributed training infrastructure, or the design
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Allegation that Anthropic nerfed models and Dario sabotaged codebase
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Imagine how long Anthropic have had their models nerfed on purpose Dario masterclass in sabotaging your codebase while you were thinking Claude Code is just working for you lol
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Gemini 3.5 Pro and GPT-5.6 near release; Anthropic frontier lab
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It's already June 9th, and Gemini 3.5 Pro and GPT-5.6 are nearing release (Google even already announced 3.5 Pro during i/o) Rumor has it that GPT-5.6 will be released as early as next week. So far, it's safe to say that – guardrails aside – Anthropic is truly the frontier lab
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OpenAI criticized for losing lead and credibility to Anthropic
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OpenAI is hosed. There is almost no reason to prefer them over Anthropic, they have lost their lead (despite every advantage in the world), they have made commitments far far beyond their means, their leader has lost credibility, and they don’t have a plausible plan for becoming… https://t.co/9fDsAplXB2
— Gary Marcus (@GaryMarcus) 9 juin 2026OpenAI is hosed. There is almost no reason to prefer them over Anthropic, they have lost their lead (despite every advantage in the world), they have made commitments far far beyond their means, their leader has lost credibility, and they don’t have a plausible plan for becoming
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Claude Fable 5 now available on Databricks across AWS, Azure, GCP
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@AnthropicAI
's Claude Fable 5 is now available on Databricks, governed by Unity AI Gateway, across AWS, Azure, and GCP! Fable 5 sets a new state of the art on OfficeQA Pro at 57.9% and is designed for work that was previously too complex or too long-running to hand to an AI. -
Anthropic protects its own IP while using others’ IP freely
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Anthropic didn’t just add guardrails to make Mythos safer; they added guardrails to protect their own IP. *Their own IP*. They are still as happy as fuck to build their AI on other people’s IP.
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34 days from signing deal to Mythos-class model GA launch
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for those keeping track at home it was 34 days between signing this deal and launching Mythos-class model GA to the world. https://
x.com/leerob/status/
2052059466821198061?s=20
… building on @nvidia stack means you can just do things™.