moonshotai / text-generation API-only released 2026-10-23

Kimi K3.1 Pro

Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window. It is built for long-horizon coding, 3D...

Input / 1M
$2.00
Output / 1M
$10.00
Context
1M
AA Intelligence
55.1
Closed weights — available only as a hosted API text + image + video → text View on OpenRouter ↗

Pricing

via OpenRouter · USD per 1M tokens · synced 2026-10-24
$2.00
input / 1M
$10.00
output / 1M
$0.20
cached input / 1M
$12.00
1M in + 1M out
Context window
1,048,576 tokens
Max output
943,718 tokens
Providers
1
Cheapest provider
Moonshot AI · $2.00 / $10.00
Best throughput
—
AA Intelligence / Coding / Agentic
55.1 / — / —
✓ Tool calling ✓ Reasoning ✓ Structured outputs ✓ Image input ✗ File input ✗ Audio input ✓ Prompt caching

Price history

tracking started — chart appears after 7 days of snapshots (1 recorded)
Current: $2.00 input · $10.00 output per 1M tokens

Benchmarks

Third-party indices as published through OpenRouter — Artificial Analysis and Design Arena. Not measured by us.

AA Intelligence Index
55.1
AA Coding Index
—
AA Agentic Index
—

Providers

1 provider · per 1M tokens · last 30 min metrics
ProviderQuantContextInputOutputUptimeTok/s
Moonshot AI mxfp4 1M $2.00 $10.00 100% —
Moonshot AI mxfp4 1M $4.00 $20.00 100% —
Provider data from OpenRouter's endpoint listing, refreshed daily.

Specifications

Organisation
moonshotai
Released on OpenRouter
2026-10-23
Context window
1,048,576 tokens
Max output
943,718 tokens
Input
text, image, video
Output
text
Tokenizer
Other
Moderated by provider
No
OpenRouter id
moonshotai/kimi-k3.1-pro
Compare with
Prices, context and providers from the public OpenRouter API, snapshotted daily; benchmark indices from Artificial Analysis. See /methodology.