Kimi K3.1 Pro API pricing per million tokens
Kimi K3.1 Pro costs $2 per million input tokens and $10 per million output, with a 1.05M context window.
AIGROW credit covers Claude Opus 5.5, Claude Fable 5.2, Claude Fable 5.1, GPT-6 Astra, Claude Sonnet 5.5, GPT-6.1 Sol, GPT-6.1 Terra, Grok 4.7 and Gemini 4 Argon. See API credit
$25 a month brings $110 of API credit and cancels any time; $25 once buys $100. US dollars per million tokens, standard rate, shortest context band. Number 16 of 256 on the Epoch Capabilities Index by Epoch AI, data of 12 November 2026. CC BY 4.0
- 1,000 support replies
- $10.00
- Cached input
- $0.20
- Context window
- 1,048,576 tokens
- Released
- Not published
- Weights
- Open weights
From Moonshot AI’s own pages, 12 November 2026.
Kimi K3.1 Pro costs $2 per million input tokens and $10 per million output tokens on Moonshot AI’s own API, and $0.20 for cached input. At those prices 1,000 support replies cost $10.00, the 19th most expensive of 49 priced models on our list.
AIGROW API credit per million input / output tokens: Claude Opus 5.5 $1.60 / $8.00, Claude Fable 5.2 $3.20 / $16.00, Claude Fable 5.1 $4.00 / $20.00, GPT-6 Astra $2.50 / $12.50, Claude Sonnet 5.5 $0.80 / $4.00, GPT-6.1 Sol $0.50 / $2.50, GPT-6.1 Terra $0.25 / $1.25, Grok 4.7 $0.50 / $1.50 and Gemini 4 Argon $1.00 / $5.00. That is up to 75% below list price. See API credit
What a job costs
Three jobs, 1,000 runs of each, at the list price above, and where each puts Kimi K3.1 Pro among the 49 models with a list price.
| Job | 1,000 runs | Among 49 |
|---|---|---|
| Support reply3,000 in, 400 out. | $10.00 | 19th most expensive |
| Document summary25,000 in, 1,000 out. | $60.00 | 19th most expensive |
| Agent task80,000 in (70,000 cached), 3,000 out. | $64.00 | 17th most expensive |
The token counts are ours, chosen to look like real work; the prices are Moonshot AI’s. All three jobs stay under 100,000 tokens a request, below every long-context surcharge on the list.
The small print
What the base rate above leaves out, copied from the maker’s pages: surcharges, discounts, promotions and cache pricing.
Cache write $2 (5 min TTL) or $4 (1 h TTL). A highspeed variant costs $4 / $20. Batch 40% off. Moonshot calls it open-weight. Release date not stated on the official pages.
Kimi K3.1 Pro against the models it is weighed with
Each comparison puts both list prices side by side and costs the same three jobs on each.
- vs Kimi K3
- Moonshot's new flagship against the previous-generation K3, a third cheaper on input and output.
- vs Claude Opus 5.5
- Moonshot's open-weight flagship against Anthropic's, aimed at long-horizon coding at half the Opus list price.
- vs GPT-6.1 Sol
- Moonshot's open-weight flagship against OpenAI's Sol, at the same $2 / $10 list price.
- vs GLM-5.3
- Two open-weight frontier models from China, with Kimi K3.1 Pro dearer on input and over twice the price on output.
Other Moonshot AI models
| Model | Input | Output | Context | 1,000 replies |
|---|---|---|---|---|
| Kimi K2.6Moonshot AI · open weightsNewer model: Kimi K3.1 Pro | $0.95 | $4.00 | 262K | $4.45 |
| Kimi K3Moonshot AI · open weightsNewer model: Kimi K3.1 Pro | $3.00 | $15.00 | 1.05M | $15.00 |
Where the price comes from
- Moonshot AI
- platform.kimi.ai/docs/pricing/chat
Read on 12 November 2026. Each price is the standard rate for the shortest context band, with no batch or priority discount; long-context surcharges, batch rates and promotions are in each model’s small print. No price was taken from a reseller.
Compare Kimi K3.1 Pro with 53 other models
The price list sets every model’s input and output price side by side, with what a support reply, a document summary and an agent task cost on each.
Prices checked 12 November 2026 · See them by release date