MoonshotAI

Kimi K3.1 Pro API pricing.

Kimi K3.1 Pro is MoonshotAI’s model on the API market, released 23 Oct 2026. Prices are per million tokens in USD, as last read from the price list.

$2.00Input / 1M
$10Output / 1M
1.0MContext
944KMax output
Specification
USD per million tokens
Provider
MoonshotAI
Model id
moonshotai/kimi-k3.1-pro
Input
$2.00
Output
$10
Cached input
$0.20
Context window
1.0M tokens
Maximum output
944K tokens
Takes
text, image, video
Returns
text
Tool use
Yes
Reasoning
Yes
Released
23 Oct 2026
First tracked
23 Oct 2026

At $2.00 per million input tokens, Kimi K3.1 Pro is dearer than 264 of the 340 models on the price list.

Price changes
Tracked since 17 Sept 2026

No price change has been recorded since tracking began on 17 Sept 2026. Prices are checked every six hours, and any change is listed here and on model changes.

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Coverage
2 stories
  1. Simon Willison's Weblog ·
    Introducing Kimi K3.1 Pro
  2. The Decoder ·
    Chinese AI model Kimi K3.1 Pro is closing in on Anthropic's Claude Opus 5.5
More from MoonshotAI
Cheapest input first
  1. Kimi K3$0.19 in · $15 out
  2. Kimi K2.5$0.50 in · $2.50 out
  3. Kimi K2 0711$0.57 in · $2.30 out
  4. Kimi K2.7 Code$0.60 in · $3.50 out
  5. Kimi K2 Thinking$0.60 in · $2.50 out
  6. Kimi K2 0905$0.60 in · $2.50 out
  7. Kimi K2.6$0.65 in · $3.41 out

Prices and specifications come from OpenRouter’s catalogue, last read 2 Nov 2026. A provider’s own price may differ; how this is collected.