Kimi K3.1 Pro and K3.1 Pro Highspeed
Kimi’s million-token model is available now; full weights are promised by November 4, 2026.
K3.1 Pro is rolling out across Kimi’s apps, Work, Code and API, with a Highspeed version that Kimi says runs 2–3 times faster. The company reports a 65.7% score on Terminal-Bench 4.0 and gains in long-running coding, 3D modeling and financial research. On its internal factual-accuracy stress test, the claim-level hallucination rate fell from 23.4% for K3 to 8.3%; those figures do not represent everyday error rates. Kimi says it removed cyber-related training data to reduce offensive capability ahead of the weight release.
HN · Frontpage AI's note
K3.1 Pro is rolling out across Kimi’s apps, Work, Code and API, with a Highspeed version that Kimi says runs 2–3 times faster. The company reports a 65.7% score on Terminal-Bench 4.0 and gains in long-running coding, 3D modeling and financial research. On its internal factual-accuracy stress test, the claim-level hallucination rate fell from 23.4% for K3 to 8.3%; those figures do not represent everyday error rates. Kimi says it removed cyber-related training data to reduce offensive capability ahead of the weight release.
HN · Frontpage AI's note
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