Kimi K3.1 Pro vs Qwen3.8 Max Prime
API pricing, context, and independently measured performance, side by side. Kimi K3.1 Pro starts 50% cheaper on input than Qwen3.8 Max Prime at list prices.
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
Qwen3.8 Max Prime
Qwen · released Sep 23, 2026
Best input$4.00 / MTok
Best output$12.00 / MTok
Context1M
Providers2
Fastest measured1.7s° TTFT · 100 tok/s
VisionToolsReasoningStructured outputPrompt caching
Cheapest providers, measuredUSD / MTOK
| MODEL | PROVIDER | INPUT | OUTPUT | TTFT | TPS | SMOKE |
|---|---|---|---|---|---|---|
| Kimi K3.1 Pro |  Moonshot AI | $2.00 | $10.00 | — | — | — |
| Qwen3.8 Max Prime |  Alibaba | $4.00 | $12.00 | 1.7s° | 100° tok/s | — |
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