Anthropic Unveils Claude Fable 5.2 and Mythos 5.2 with Major Coding and Reasoning GainsOpenRouter (@OpenRouter)T1·Models

Anthropic Releases Claude Fable 5.2 with 1M Context Window

Original title: Claude Fable 5.2 from @AnthropicAI is live on OpenRouter: 1M context, $8/M input, $40/M output

78AI Score

Anthropic has launched Claude Fable 5.2, positioned as its model for the most ambitious technical work and a step above Opus 5.5 on most evals. It delivers up to 30% faster output than Fable 5.1 at $8/M input and $40/M output with a 1M context window, and is now live on OpenRouter. Anthropic reports 69.9% on FrontierSWE v2, 89.3% on OSWorld 2.1 and 74.2% on Humanity's Last Exam with tools.

Related Entities

COAnthropic MODClaude Fable 5.2 TOOLOpenRouter

Full Report

OpenRouter · 2026-11-09 19

Claude Fable 5.2 from @AnthropicAI is live on OpenRouter: 1M context, $8/M input,$ 40/M output

↳ 引用 @ModelsOnOR (Models on OpenRouter): Claude Fable 5.2 from @AnthropicAI is live on OpenRouter

Anthropic's model for the most ambitious technical work, a step above Opus 5.5 on most of its evals. Up to 30% faster output than Fable 5.1, now at a lower price: $8/M input,$ 40/M output, 1M context.

Anthropic's numbers: 69.9% on FrontierSWE v2, 89.3% on OSWorld 2.1 and 74.2% on Humanity's Last Exam with tools.

See more: