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Pyyan / Compare / Kimi K3.1 Pro vs Claude Fable 5

Kimi K3.1 Pro vs Claude Fable 5

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Language Models · verified 26 Oct 2026

Kimi K3.1 ProMoonshot AIcurrent
Claude Fable 5Anthropiccurrent
3 slots left
SpecificationKimi K3.1 ProClaude Fable 5
SummaryFrontier coding numbers at a fifth of the price, with the weights promised for November.Most capable widely released model, for the hardest reasoning and long-horizon agentic work.
Context1M1M
Input ($/Mtok)$2$10
Output ($/Mtok)$10$50
LicenceClosed for now, weights promised 4 Nov 2026Proprietary
Max output944K128K
Parameters3T class, exact count not published—
Released23 Oct 2026—
Model IDkimi-k3.1-proclaude-fable-5
CategoryLanguage ModelsLanguage Models
OfficialMoonshot AI ↗Anthropic ↗

Highlighted rows are where these differ.

Kimi K3.1 Pro

  • 65.7% on Terminal-Bench 4.0 in Moonshot's own table, against 66.4% for Claude Opus 5.5 and 58.2% for GPT-6 Astra
  • Claim-level hallucination rate down from 23.4% on K3 to 8.3%
  • Cyber training data deliberately removed, which Moonshot says costs about nine points on xdev-bench-hard
  • Full weights promised by 4 November 2026, so the licence is not yet knowable

Best for long-horizon coding when the budget is the constraint.

Full spec sheet →

Claude Fable 5

  • Thinking is always on — the `thinking` param is rejected
  • Raw chain of thought is never returned
  • Requires 30-day data retention; unavailable under ZDR

Best for the hardest problems.

Full spec sheet →