AI BriefingMoonshot AI releases Kimi K3.1 Pro: 33% API price cut and open weights release planned
·2026.10.24 18:30
Key point
Moonshot AI has released Kimi K3.1 Pro, lowering API prices by 33% and announcing an upcoming open weights release.
Details
- Moonshot AI released Kimi K3.1 Pro, a post-training model based on Kimi K3, and a Highspeed variant that is 2–3 times faster
- API prices have been reduced by 33% compared to the previous K3, adjusted to $2.00 for input and $10.00 for output (per 1 million tokens)
- It recorded higher scores than Claude Opus 5.5 on SWE Marathon v1.1 (51.7%), HLE-Full with tool use (70.0%), and BrowseComp (92.1%)
- Cybersecurity data was removed to prepare for the open weights release, causing the xdev-bench-hard score to drop from 90.5% to 81.0%
- It supports 1 million token context and provides an OpenAI-compatible API, with thinking mode enabled by default
- Weights are scheduled to be released by November 4, and the K2 series is planned for phased deprecation by the end of December 2026
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