Anthropic launched Claude Fable 5.2 on November 9, 2026, with a record score of 174 on the Epoch Capabilities Index, ahead of GPT-6 Astra at 169. The model also leads the Artificial Analysis Intelligence Index with 65 points, compared with 60 for Gemini 4 Carbon and 59 for Claude Opus 5.5. Built for complex reasoning and agentic tasks, it scores 80% on HLE-Diamond and between 73% and 75% on Terminal-Bench-Science. Its pricing is 20% lower than Fable 5.1 at $8 per million input tokens and $40 per million output tokens. It nevertheless retains a premium position, with a one-million-token context window and the ability to produce up to 128,000 tokens in a single response.
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