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Kimi K3.1 Pro upgrades Moonshot's 3T-class Kimi K3 and has a 1M-token context window. It's live now in Kimi's apps and API at $2 per million input tokens and $10 per million output tokens. A Highspeed version runs 2 to 3 times faster for $4 and $20. Moonshot says it scored 65.7% on Terminal-Bench 4.0, just behind Claude Opus 5.5 at 66.4%, but that's the company's own number. The API accepts OpenAI- and Anthropic-style requests, so you can put it behind Claude Code or Codex. Moonshot also says it stripped hacking-related training data out before the open release.
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