Kimi K3.1 Pro debuts with 3T params, matching frontier models on agentic coding

karminski3 · x · 2026-10-24

Moonshot released Kimi-K3.1-Pro, a 3T-parameter model whose coding lands between Claude Opus 5.5 and Fable 5.1, matching OpenAI and Anthropic flagships on SWE agentic coding benchmarks and setting a new high on TerminalBench. A new benchmark, BencCAD, tests CAD modeling, with demos in the official blog. Author is testing it and wonders what the "Pro" suffix means for pricing.

Related event: Moonshot Releases Kimi K3.1 Pro, a 3T-Class Open-Weight Model Rivaling GPT-6 and Claude(31 posts)→

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