Anthropic Launches Claude Fable 5.2 with Lower Pricing and 1M Token Context
Anthropic released Claude Fable 5.2 and restricted-access Mythos 5.2 on Nov 9, featuring a 1M token context window and a 20% price reduction compared to the previous generation.
In its platform update log on November 9, Anthropic announced the launch of Claude Fable 5.2 (claude-fable-5-2) and Claude Mythos 5.2. Both new models feature a 1 million token context window, up to 128k max output tokens, and always-on adaptive thinking.
Pricing for the new models has decreased compared to the previous generation, Claude Fable 5.1: input costs are now $8 USD per million tokens and output costs are $40 USD per million tokens (down from $10/$50). Claude Mythos 5.2 offers the same capabilities but is restricted to organizations verified through Anthropic’s programs, such as the Cyber Verification Program.
Additionally, Anthropic introduced 'fast mode' for Claude Fable 5.2, delivering up to 2.5x higher output tokens per second at a premium rate of $16 USD per million input tokens and $80 USD per million output tokens. Developers can enable this by setting speed: "fast" in their requests without needing a beta header.