Kimi K3.1 Pro
Fourth on the Artificial Analysis index at 55, one point behind Sonnet 5.5, at the same $2 in / $10 out list price, with the weights still to come.
Key facts
- Score
- 86 / 100, rank #2Evals95Price38Peoplen/aFit100
- Price
- $2 in · $10 out per 1M tokens (Kimi API model pricing)
- Blended price
- $4 per 1M tokens (3 input : 1 output)
- Context window
- 1M
- Open weights
- Yes
- Best for
- Agentic coding with an open-weight exit, 1M-token long-context work, Moving off Kimi K3
Kimi K3.1 Pro costs $2 per million input tokens and $10 per million output tokens on Moonshot's list price (Kimi API model pricing, read Oct 26, 2026). Compare API rates and calculate a monthly workload cost.
Independent evals
| Benchmark | Result | Who ran it | Read |
|---|---|---|---|
| Artificial Analysis Intelligence Index | 55 | Kimi K3.1 Pro - Artificial Analysis | Oct 26, 2026 |
| Terminal-Bench 4.0 (vendor) | 65.7% | Kimi K3.1 Pro announcement | Oct 26, 2026 |
- Artificial Analysis output speed (tokens/s): 51 (Kimi K3.1 Pro - Artificial Analysis)
What practitioners say
No practitioner threads recorded in Signals yet; left out of the score rather than guessed.
Caveats
- Scores within three points of Sonnet 5.5 (tie), and ranks on evals and price alone because no practitioner sentiment exists yet.
- Moonshot says the full weights arrive by 4 Nov 2026; until then it is open-weight in intent, hosted-only in practice.
- Artificial Analysis rates it slow (51 tokens/s) and very verbose: 150M tokens to run its index, which is where the $2.11 per-task cost comes from.
- Moonshot's Terminal-Bench figure is vendor-run and is not counted. No Arena or Scale result yet, and no practitioner threads in Signals, so sentiment is left out.
Questions people ask
How much does Kimi K3.1 Pro cost?
Kimi K3.1 Pro costs $2 per million input tokens and $10 per million output tokens on Moonshot's list price (Kimi API model pricing, read Oct 26, 2026).
How good is Kimi K3.1 Pro?
Kimi K3.1 Pro ranks #2 of 27 on the Models at Work leaderboard with a score of 86 out of 100 (October 2026 edition). Fourth on the Artificial Analysis index at 55, one point behind Sonnet 5.5, at the same $2 in / $10 out list price, with the weights still to come.
What is Kimi K3.1 Pro best for?
Kimi K3.1 Pro is best for agentic coding with an open-weight exit, 1m-token long-context work, moving off kimi k3.
What are Kimi K3.1 Pro's benchmark scores?
Artificial Analysis Intelligence Index: 55 (Kimi K3.1 Pro - Artificial Analysis); Terminal-Bench 4.0 (vendor): 65.7% (Kimi K3.1 Pro announcement).
What is Kimi K3.1 Pro's context window?
Kimi K3.1 Pro has a 1M token context window according to Moonshot.
Is Kimi K3.1 Pro open weights?
Yes. Kimi K3.1 Pro is released with open weights, so it can be self-hosted.
Compare Kimi K3.1 Pro
Methodology: Score is 0 to 100 and computed, not typed: 55% independent evals (Artificial Analysis, Arena, Scale SEAL, Epoch, each scaled against its natural floor and the best score in this table, then averaged), 15% blended price on a fixed log scale ($0.05 per million is 100, $60 is 0), 15% practitioner sentiment from Signals and community threads, 15% operational fit (context window, open weights). A missing component drops out and the rest are reweighted. A model with no independent eval yet is provisional and ranks below every measured one. Within three points is a tie. Vendor-published figures are labelled and never counted. Our coverage: read the article.