Kimi K3.1 Pro

Name: Kimi K3.1 Pro
Price: 2 USD
Author: Moonshot AI

Moonshot AI🇨🇳 China

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Context window1049K tokens

Input / 1M tokens$2

Output / 1M tokens$10

Pricing source: Kimi API pricing page (platform.kimi.ai), 2026-10-23.

Version History

K3.1 ProminorOctober 23, 2026

Kimi K3.1 Pro is a post-trained version of Kimi K3 with substantially larger post-training compute and a 1M-token context window. Kimi also released K3.1 Pro Highspeed, which it says is 2-3× faster.

Coverage

model releaseMoonshot AI

Kimi K3.1 Pro launches with 1M-token context, 65.7% on Terminal-Bench 4.0; open weights due by Nov 4

Kimi K3.1 Pro, the first model in the K3.1 series, is a 3T-class open-weight model with a 1-million-token context window. It scores 65.7% on Terminal-Bench 4.0 and is available today on Kimi.com, Kimi Work, Kimi Code and the Kimi API. Full weights will be released by Nov 4.

October 23, 2026 · 5:32 PM3 min read

Kimi Moonshot AI open-weight