Qwen3 Coder Flash vs Seed 1.6 Vision vs Mistral Medium 3.1
Seed 1.6 Vision comes out ahead, 63 to 50 and 50 on our weighted score, and it is the cheaper option too.
Alibaba (Qwen)Qwen3 Coder Flash
50/100- ECI—
- Price$0.30 / $1.50
- Context1M
- Our pick
ByteDance SeedSeed 1.6 Vision
63/100- ECI—
- Price$0.119 / $1.19
- Context256K
Mistral AIMistral Medium 3.1
50/100- ECI—
- Price$0.40 / $2.00
- Context262K
Seed 1.6 Vision is our pick
Seed 1.6 Vision is the better all-round choice, scoring 63/100 against Qwen3 Coder Flash (50) and Mistral Medium 3.1 (50). It leads on price and inputs & features. Qwen3 Coder Flash wins on context window. 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 priceSeed 1.6 VisionSeed 1.6 Vision $0.386 · Qwen3 Coder Flash $0.60 · Mistral Medium 3.1 $0.80 per 1M tokens (3:1 blend)
- Longest contextQwen3 Coder FlashQwen3 Coder Flash 1,000,000 · Mistral Medium 3.1 262,144 · Seed 1.6 Vision 256,000 tokens
- Widest inputsSeed 1.6 Vision and Mistral Medium 3.1Qwen3 Coder Flash: Text · Seed 1.6 Vision: Text, Images · Mistral Medium 3.1: Text, Images
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | Qwen3 Coder Flash | Seed 1.6 Vision | Mistral Medium 3.1 |
|---|---|---|---|---|
| Price | 50% | 60 | 69 | 54 |
| Inputs & features | 30% | 25 | 70 | 50 |
| Context window | 20% | 60 | 36 | 37 |
| Overall | 100% | 50/100 | 63/100 | 50/100 |
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 | Qwen3 Coder FlashAlibaba (Qwen) | Seed 1.6 VisionByteDance Seed | Mistral Medium 3.1Mistral AI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $0.30 | $0.119 (best) | $0.40 |
| Output | $1.50 | $1.19 (best) | $2.00 |
| Cached input | — | $0.024 | — |
| Blended (3:1) | $0.60 | $0.386 (best) | $0.80 |
| Long-context rate | Same rate | Over 32K: $0.178 / $2.37 | Same rate |
| Price source | Official Alibaba API | Official Volcengine Ark API | Official Mistral API |
| Limits | |||
| Context window | 1,000,000 tokens (best) | 256,000 tokens | 262,144 tokens |
| Max output | 65,536 tokens | 32,000 tokens | 262,144 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | No | Yes | Yes |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | No | Yes | No |
| Tool calling | Yes | Yes | Yes |
| Structured output | No | Yes | No |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | qwen3-coder-flash | doubao-seed-1-6-vision-250815 | mistral-medium-2508 |
| API providers | 10 (best) | 2 | 1 |
| Released | Jul 28, 2025 | Aug 15, 2025 | Aug 12, 2025 |
| Knowledge cutoff | Apr 2025 | — | May 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Qwen3 Coder Flash$6.00
- Seed 1.6 Vision$3.56
- Mistral Medium 3.1$8.00
Which should you choose?
Which is better: Qwen3 Coder Flash, Seed 1.6 Vision or Mistral Medium 3.1?
Seed 1.6 Vision is the better all-round choice, scoring 63/100 against Qwen3 Coder Flash (50) and Mistral Medium 3.1 (50). It leads on price and inputs & features. Qwen3 Coder Flash wins on context window. 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, Qwen3 Coder Flash, Seed 1.6 Vision or Mistral Medium 3.1?
Seed 1.6 Vision is cheaper at $0.119 input / $1.19 output per million tokens (official Volcengine Ark API price). Qwen3 Coder Flash costs $0.30 input / $1.50 output per million tokens (official Alibaba API price); Mistral Medium 3.1 costs $0.40 input / $2.00 output per million tokens (official Mistral API price). At a typical mix of three input tokens to one output token, that is $0.386 per million tokens for Seed 1.6 Vision versus $0.60 for Qwen3 Coder Flash (1.6× as much) and $0.80 for Mistral Medium 3.1 (2.1× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Qwen3 Coder Flash has not been scored yet, Seed 1.6 Vision has not been scored yet and Mistral Medium 3.1 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Qwen3 Coder Flash, Seed 1.6 Vision and Mistral Medium 3.1 yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
Qwen3 Coder Flash has the largest context window at 1,000,000 tokens, against 262,144 for Mistral Medium 3.1 and 256,000 for Seed 1.6 Vision. Maximum output per response: Qwen3 Coder Flash up to 65,536, Seed 1.6 Vision up to 32,000, Mistral Medium 3.1 up to 262,144 tokens.
Which can read images, PDFs, audio or video?
Qwen3 Coder Flash accepts text; Seed 1.6 Vision accepts text and images; Mistral Medium 3.1 accepts text and images. Seed 1.6 Vision handles the widest range of inputs.
Are any of these open source?
No. Qwen3 Coder Flash, Seed 1.6 Vision and Mistral Medium 3.1 are proprietary and only available through APIs and apps.
Which is newer?
Seed 1.6 Vision is the newest, released Aug 15, 2025. Mistral Medium 3.1 came out Aug 12, 2025; Qwen3 Coder Flash came out Jul 28, 2025. Knowledge cutoff: Qwen3 Coder Flash Apr 2025, Mistral Medium 3.1 May 2025.
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 Oct 4, 2026.
