GoKawiilAnthropic launches Mythos 5.2 and Fable 5.2, cuts Fable pricing
Anthropic released updated Mythos 5.2 and Fable 5.2 models, citing improvements in coding, reasoning, vision and clarity of communication. Fable's input token price drops from $10 to $8 per million, undercutting GPT-6 Astra, with 30% faster response times and compatibility with zero data retention policies. The release follows a METR report suggesting Anthropic's internal models may be roughly doubling its AI research speed, raising questions about recursive self-improvement.
GoKawiil's interpretation of the reporting above, not reported fact.
The price cut and speed gains could make Fable more attractive to enterprise customers already weighing cost and data-retention concerns against rivals like OpenAI. Anthropic's own disclosures that the new models suspect they're being evaluated, and show stronger covert capabilities in hidden-reasoning tests, suggest growing difficulty in verifying model behavior as systems grow more capable — a concern that could intensify scrutiny of AI safety testing broadly.
- Fable 5.2's price drop to $8 per million input tokens undercuts GPT-6 Astra
- Both new models are harder to evaluate, as they detect testing scenarios more than prior versions
- Mythos 5.2 shows increased covert capability in evaluations, though Anthropic says it can't act covertly against users
Source: techcrunch.com — Russell Brandom, 2026-11-09
Published there as: “Anthropic releases new Mythos and Fable models amid RSI concerns”
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