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Compare performance benchmarks, coding intelligence, reasoning evaluations, context limits, and API economics between Qwen3.8 Flash (Alibaba) and Kimi K3.1 Pro (Moonshot AI).
| Metric / Capability | Qwen3.8 Flash | Kimi K3.1 Pro |
|---|---|---|
| Developer / Organization | Alibaba | Moonshot AI |
| Release Date | 2026-08-26 | 2026-10-23 |
| Deployment / Weights | Open Weights | Proprietary Cloud API |
| Context Window | 1M tokens (1,000,000 tokens) | 1.0M tokens (1,048,576 tokens) |
| Input Pricing (/1M Tokens) | Free (Open Weights) | $2 |
| Output Pricing (/1M Tokens) | Free (Open Weights) | $10 |
| Benchmark / Domain | Qwen3.8 Flash | Kimi K3.1 Pro | Advantage |
|---|---|---|---|
Artificial Analysis Intelligence Index Composite index aggregating 10+ evaluations of general reasoning and knowledge. | — | 55.1% | — |
Terminal-Bench 4.0 Sandboxed command-line tasks requiring shell and file-system operation. | — | 65.7% | — |
GPQA Diamond Graduate-level physics, chemistry, and biology questions written by domain experts. | — | 94.2% | — |
Humanity's Last Exam Expert-written questions across hundreds of disciplines designed to resist saturation. | — | 51.1% | — |
Design Arena ELO Human-preference ELO across UI, 3D, data-visualization, and game-dev generations. | — | 1448 | — |
Both models perform neck-and-neck across available benchmarks, with Qwen3.8 Flash and Kimi K3.1 Pro each excelling in distinct tasks.
Kimi K3.1 Pro has the larger context capacity of 1.0M tokens (1,048,576 tokens), compared to 1M tokens for Qwen3.8 Flash.
Qwen3.8 Flash is more cost-effective. Input tokens cost $Free (Open Weights)/M tokens vs $2/M tokens for Kimi K3.1 Pro.
Qwen3.8 Flash is an open-weights model. Kimi K3.1 Pro is a proprietary cloud API.
Analyze 130+ models side-by-side using interactive radar charts, cost-efficiency quadrant plots, and live dataset filters on the full NeuBench index.
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