Kimi K3 vs Kimi K3.1 Pro
API pricing, context, and independently measured performance, side by side. Kimi K3 starts 88% cheaper on input than Kimi K3.1 Pro at list prices.
Kimi K3
Moonshot AI · released Jul 16, 2026
Best input$0.238 / MTok
Best output$5.50 / MTok
Context1.05M
Providers31
Fastest measured0.8s° TTFT · 105 tok/s
Open weightsVisionToolsReasoningStructured outputPrompt caching
Kimi K3.1 Pro
Moonshot AI · released Oct 23, 2026
Best input$2.00 / MTok
Best output$10.00 / MTok
Context1.05M
Providers2
Fastest measured—
VisionToolsReasoningStructured outputPrompt caching
Cheapest providers, measuredUSD / MTOK
| MODEL | PROVIDER | INPUT | OUTPUT | TTFT | TPS | SMOKE |
|---|---|---|---|---|---|---|
| Kimi K3 |  Wafer | $0.238 | $24.00 | 1.7s° | 117° tok/s | 0/5 |
| Kimi K3 |  InferenceNet | $0.239 | $10.80 | — | — | — |
| Kimi K3 |  Relace | $0.30 | $12.00 | 2.6s° | 113° tok/s | — |
| Kimi K3.1 Pro |  Moonshot AI | $2.00 | $10.00 | — | — | — |
TTFT/TPS: ModelIndex-measured medians (P50, trailing 21d) · chat10k profile (~10K in / 200 out) · ° = measured via OpenRouter routing (adds a hop) · SMOKE: of 5 programmatic capability probes passed · methodology v1.1 — full details on each model page