Kimi K3.1 Pro vs Qwen 3.8 Max Prime
Kimi K3.1 Pro comes out ahead, 46 to 39 on our weighted score, and it is the cheaper option too.
- Our pick
Moonshot AIKimi K3.1 Pro
46/100- ECI—
- Price$2.00 / $10.00
- Context1.05M
Alibaba (Qwen)Qwen 3.8 Max Prime
39/100- ECI—
- Price$4.00 / $12.00
- Context1M
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Make it a three-way comparison.
Kimi K3.1 Pro is our pick
Kimi K3.1 Pro is the better all-round choice, scoring 46/100 against Qwen 3.8 Max Prime (39). It leads on price and inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceKimi K3.1 ProKimi K3.1 Pro $4.00 · Qwen 3.8 Max Prime $6.00 per 1M tokens (3:1 blend)
- Longest contextKimi K3.1 ProKimi K3.1 Pro 1,048,576 · Qwen 3.8 Max Prime 1,000,000 tokens
- Widest inputsSame inputsKimi K3.1 Pro: Text, Images, Video · Qwen 3.8 Max Prime: Text, Images, Video
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Kimi K3.1 Pro | Qwen 3.8 Max Prime |
|---|---|---|---|
| Price | 50% | 20 | 12 |
| Inputs & features | 30% | 80 | 70 |
| Context window | 20% | 61 | 60 |
| Overall | 100% | 46/100 | 39/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Kimi K3.1 ProMoonshot AI | Qwen 3.8 Max PrimeAlibaba (Qwen) |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $2.00 (best) | $4.00 |
| Output | $10.00 (best) | $12.00 |
| Cached input | $0.20 | — |
| Blended (3:1) | $4.00 (best) | $6.00 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Moonshot AI API | Median of 5 providers |
| Limits | ||
| Context window | 1,048,576 tokens (best) | 1,000,000 tokens |
| Max output | 131,072 tokens | 131,072 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | Yes | Yes |
| Reasoning | Yeslow · high · max | Yes |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | kimi-k3.1-pro | — |
| API providers | 17 (best) | 5 |
| Released | Oct 23, 2026 | Sep 23, 2026 |
| Knowledge cutoff | — | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Kimi K3.1 Pro$40.00
- Qwen 3.8 Max Prime$64.00
Which should you choose?
Which is better: Kimi K3.1 Pro or Qwen 3.8 Max Prime?
Kimi K3.1 Pro is the better all-round choice, scoring 46/100 against Qwen 3.8 Max Prime (39). It leads on price and inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Kimi K3.1 Pro or Qwen 3.8 Max Prime?
Kimi K3.1 Pro is cheaper at $2.00 input / $10.00 output per million tokens (official Moonshot AI API price). Qwen 3.8 Max Prime costs $4.00 input / $12.00 output per million tokens (median across 5 API providers). At a typical mix of three input tokens to one output token, that is $4.00 per million tokens for Kimi K3.1 Pro versus $6.00 for Qwen 3.8 Max Prime (1.5× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Kimi K3.1 Pro has not been scored yet and Qwen 3.8 Max Prime has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Kimi K3.1 Pro and Qwen 3.8 Max Prime yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
Kimi K3.1 Pro has the largest context window at 1,048,576 tokens, against 1,000,000 for Qwen 3.8 Max Prime. Maximum output per response: Kimi K3.1 Pro up to 131,072, Qwen 3.8 Max Prime up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Kimi K3.1 Pro accepts text, images and video; Qwen 3.8 Max Prime accepts text, images and video. They handle the same number of input types.
Are any of these open source?
No. Kimi K3.1 Pro and Qwen 3.8 Max Prime are proprietary and only available through APIs and apps.
Which is newer?
Kimi K3.1 Pro is the newest, released Oct 23, 2026. Qwen 3.8 Max Prime came out Sep 23, 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
