Kimi K3.1 Pro
Key facts · verified Oct 27, 2026
Kimi K3.1 Pro is a Moonshot AI model released on 24 Oct 2026. Its API price is $2 per million input tokens and $10 per million output tokens ($0.20 cached input). Its context window is 1M tokens. It is not yet ranked on LMArena's text leaderboard. Source: platform.kimi.ai.
Moonshot AI’s Kimi K3.1 Pro, released 24 October 2026: the first model in its K3.1 series, a post-trained version of Kimi K3 that Moonshot describes as its most capable 3T-class open-weight model, with a 1-million-token context window. Moonshot names coding, 3D creation and financial research as the main gains. It is on Kimi.ai, Kimi Work, Kimi Code and the Kimi API at $2 per million input tokens and $10 per million output tokens, with a Highspeed version at 2-3 times the speed for $4 and $20. Moonshot states the full weights will be released by 4 November 2026.
$2 / $10 per million tokens
1M tokens
Not rated
Not ranked
Key Features
Full Specifications
$2 / $10 per million tokens | |
|---|---|
| Identity | |
| Developer | Moonshot AI |
| Released | Oct 2026 |
| Status | GA |
| Licence | Open weights announced — Moonshot states full weights by 4 November 2026 |
| Self-hostable | Not yet — weights due by 4 November 2026 |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $4.000 / 1M tokens |
| Input price | $2.000 / 1M tokens |
| Output price | $10.000 / 1M tokens |
| Cached input | $0.20 / 1M tokens; cache writes $2 (5-minute TTL) or $4 (1-hour TTL) |
| Free tier | Not offered — unlocked after a minimum $1 top-up |
| Capacity | |
| Context window | 1M tokens |
| Max output | 131,072 tokens by default; max_completion_tokens up to 1,048,576 |
| Capability | |
| Vision in | Yes — images and video (base64 or uploaded files; no public URLs) |
| Audio in | Not stated |
| Function calling | Yes |
| Structured output | Yes — json_schema with strict: true |
| Extended reasoning | Yes — always on; reasoning_effort low, high or max (default max) |
| Web search | Being updated by Moonshot; not recommended for production in the near term |
| Access | |
| API | Yes |
| Chat app | Yes |