Moonshot releases Kimi K3.1 Pro via API, with open weights promised by Nov 4
AIMoonshot released Kimi K3.1 Pro on its API, with full weights promised by November 4, 2026. It is priced at $2.00 per million input tokens and $10 per million output tokens, and Artificial Analysis scored it 55, behind only Claude Opus 5.5 at 58.
AIWhy it matters.
The post pairs Moonshot's pricing and benchmark claims with Artificial Analysis scores and a hands-on API test, showing how a soon-to-be open-weight model ranks against frontier closed models.
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Simon Willison · simonwillison.netPublished · added here
Original title: Introducing Kimi K3.1 Pro