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Claude Fable 5

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Anthropic researcher credits Claude Fable 5 with a Jacobian Conjecture counterexample

Anthropic researcher credits Claude Fable 5 with a Jacobian Conjecture counterexample

DP News TeamJul 20, 2026

Anthropic makes Claude Fable 5 permanent in Max and Team Premium plans from July 20

Anthropic makes Claude Fable 5 permanent in Max and Team Premium plans from July 20

Anthropic extends free Claude Fable 5 access on paid plans to July 19

Anthropic extends free Claude Fable 5 access on paid plans to July 19

Latest

News
Anthropic faces backlash over Claude Fable 5 provision that silently limits researchers' answers
A paragraph in the model's 319-page system card says Fable 5 quietly limits answers about frontier AI development without telling users. Researchers…
Dmytro Spodarets · Jun 10
News
Anthropic launches Claude Fable 5 and a cyberdefender-only Mythos 5 model
The pair costs $10 per million input tokens and $50 per million output tokens, with Fable 5 ranking first on two third-party coding and finance…
Dmytro Spodarets · Jun 10