According to @claudeai, biology fallbacks dropped ~85%, expanding safe help for health and education while dual‑use queries still route to Opus 5.

According to @galnagli, Claude Opus 5 immediately probed /phpmyadmin and found 2 critical vulns, outperforming Opus 4.6 on repeated pentest runs.

According to CNBC... Anthropic’s Claude Opus 5 challenges Fable 5 on quality while undercutting price, easing enterprise AI cost pressure, per CNBC reporting.

According to KyeGomezB, Commerce eased MYTHOS5 export limits for select users while FABLE5 stays banned, forcing Anthropic partners to tighten controls.

According to TheRundownAI, logs hint Fable 5 limits in Claude Code and Bedrock, while WIRED notes Anthropic talks shift and Legion sues export order.

According to emollick, AA Briefcase ranks Claude Fable 5 top by Elo and shows wide price gaps, but asks where human comparison scores are.

According to @KyeGomezB, Anthropic disabled Fable 5 and Mythos 5 after a US export control order, while stating other Claude models remain available.

According to @galnagli, US orders suspend Fable 5 and Mythos 5 access for foreign nationals, disrupting customers as Anthropic contests a security misunderstanding.

According to timnitGebru, Anthropic suspended Fable 5 and Mythos 5 after a US export control directive, while other Claude models remain accessible.

According to @CNBC, Anthropic disabled Fable 5 and Mythos 5 to meet a government directive, affecting enterprise users and compliance planning.

According to AnthropicAI, a US export control order forces suspension of Fable 5 and Mythos 5 for foreign nationals; other Claude models remain available.

According to God of Prompt, Fable 5 and Opus 4.8 generated full SaaS landing pages in a single prompt, compressing pitch deck mockups in one step.

According to AINewsOfficial_, Claude Fable 5 posts 80.3% on SWE-bench Pro and adds 1M context with 128k output for multi-day autonomy, surpassing rivals.

According to @_avichawla, Fable 5 runs unsupervised for hours, builds internal tools, executes SQL, and issues refunds—raising governance needs.

According to KyeGomezB, Fable 5 is a distilled, quantized Mythos 5 tuned for safety and lower cost; according to claudeai, it’s their most capable public model.