Anthropic releases Claude Fable 5 and Mythos 5 models
The new lineup prices at $10/million input tokens and $50/million output tokens. Fable 5 is Anthropic's most powerful publicly available model, outpacing Opus 4.8. Mythos 5 matches Fable 5's capabilities but is exclusive to Project Glasswing participants.
Both models support a 1M token context window and 128k token output limit. Fable 5 enables adaptive thinking by default. Fable 5 is live via API, AWS Bedrock, Vertex AI, and Microsoft Foundry.
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