Introducing Kimi K3.1 Pro

Summary by Cyber Security News23 Oct 2026, 21:40 CET

About this summary. This is a short excerpt from the description that Simon Willison published with its article. Cyber Security News did not report or verify the underlying story. Read the original: https://simonwillison.net/2026/Oct/23/kimi-k31-pro/

Introducing Kimi K3.1 Pro Kimi K3.1 Pro landed on the Kimi API today - it's not yet open weights, but Moonshot promise "Full model weights will be released by Nov 4, 2026". They're also offering a "Highspeed" version that's 2-3x faster, at twice the price (except for input token cache hits, which are priced the same). The US dollar pricing is $2.00/million tokens for input and $10/million for output - the same as GPT-6.1 Sol and half the price of Claude Opus 5.5.

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