Kimi K3.1 Pro
KimiReleased Oct 23, 2026
Kimi K3.1 Pro has no arena.ai Agents result yet, so on our leaderboard it is listed after models that do. Kimi K3.1 Pro is not ranked on LMArena yet; output price $10.00 per 1M tokens.
Quick answer
- Agents leaderboard
- No result yet
- Text (LMArena)
- No result yet
- 17NAS overall
- #73 of 87
- API price (in / out)
- $2.00 / $10.00 per 1M tokens
- Data updated
- Oct 24, 2026 · synced daily
Sources: arena.ai, LMArena, Artificial Analysis, OpenRouter
Key metrics
Pricing
- Official API list price: $2.00 input and $10.00 output per 1M tokens (USD).
- At a typical 3:1 input-to-output ratio, the blended cost is about $4.00 per 1M tokens.
- Among 82 models with an output price, it is the #52 cheapest.
- The cheapest OpenRouter route charges $2.00 input / $10.00 output.
Sources & methodology
Kimi K3.1 Pro has no arena.ai Agents result yet, so on our leaderboard it is listed after models that do.
- arena.ai Agents — agent task success rate, 95% interval, sessions and rank (via the public Hugging Face dataset, CC BY 4.0).
- LMArena — Arena score (Text leaderboard with style control, the same view arena.ai shows by default), 95% confidence interval, votes and rank.
- Artificial Analysis — Intelligence / Coding Index, output speed and latency (medians).
- OpenRouter — Route prices, context length and listing date.
Arena scores use the Bradley-Terry model (not Elo); ± is the half-width of the 95% confidence interval. Latency figures are Artificial Analysis medians; for reasoning models, time to first token and to first answer include the thinking phase. Data syncs daily at 14:20 (UTC+8).
Limits: Arena scores come from anonymous users voting on chats, so they reflect conversational preference rather than agent or coding benchmarks; with few votes the interval is wide and ranks move. Prices and speeds change as providers update them.
FAQ
What rank is Kimi K3.1 Pro right now?
Kimi K3.1 Pro has not been scored by LMArena yet, so it is not ranked here.
What does Kimi K3.1 Pro cost via API?
Input $2.00 / output $10.00 per 1M tokens (official API list price; the OpenRouter quote when no official price is available). At a typical 3:1 input-to-output ratio, the blended cost is about $4.00 per 1M tokens.
How fast is Kimi K3.1 Pro?
Artificial Analysis measures about 72 output tokens per second, 1.8 s to the first token and 30 s to the first answer token; it is a reasoning model, so latency includes thinking time.
Is Kimi K3.1 Pro open source? Can it be self-hosted?
Kimi K3.1 Pro is a closed model, available only via official APIs or hosted services.
What is the context length of Kimi K3.1 Pro?
1.05M (1,048,576 tokens, as listed on OpenRouter).
Where does the Kimi K3.1 Pro data come from and how often is it updated?
Agent success rates come from the arena.ai Agents leaderboard (CC BY 4.0), Text scores from LMArena, intelligence and speed from Artificial Analysis, and prices and context from official list prices and OpenRouter. 17NAS syncs daily at 06:20 UTC; this page was last updated Oct 24, 2026.