Devstral Medium vs Devstral Small 2
Devstral Small 2 comes out ahead, 67 to 39 on our weighted score, and it is the cheaper option too.
Mistral AIDevstral Medium
39/100- ECI—
- Price$0.40 / $2.00
- Context128K
- Our pickMistral AI
Devstral Small 2
67/100- ECI—
- Price$0.10 / $0.30
- Context262K
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Make it a three-way comparison.
Devstral Small 2 is our pick
Devstral Small 2 is the better all-round choice, scoring 67/100 against Devstral Medium (39). It leads on price, inputs & features and 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 priceDevstral Small 2Devstral Small 2 $0.15 · Devstral Medium $0.80 per 1M tokens (3:1 blend)
- Longest contextDevstral Small 2Devstral Small 2 262,144 · Devstral Medium 128,000 tokens
- Widest inputsDevstral Small 2Devstral Medium: Text · Devstral Small 2: Text, Images
- Self-hostingDevstral Small 2Publishes downloadable weights (Apache-2.0)
| Measure | Weight | Devstral Medium | Devstral Small 2 |
|---|---|---|---|
| Price | 50% | 54 | 89 |
| Inputs & features | 30% | 25 | 50 |
| Context window | 20% | 24 | 37 |
| Overall | 100% | 39/100 | 67/100 |
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 | Devstral MediumMistral AI | Devstral Small 2Mistral AI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.40 | $0.10 (best) |
| Output | $2.00 | $0.30 (best) |
| Cached input | — | — |
| Blended (3:1) | $0.80 | $0.15 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Official Mistral API | Median of 1 providers |
| Limits | ||
| Context window | 128,000 tokens | 262,144 tokens (best) |
| Max output | 128,000 tokens | 262,144 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | No | No |
| Tool calling | Yes | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Proprietary | OpenApache-2.0 |
| API model ID | devstral-medium-2507 | — |
| API providers | 2 (best) | 1 |
| Released | Jul 10, 2025 | Dec 9, 2025 |
| Knowledge cutoff | May 2025 | Dec 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Devstral Medium$8.00
- Devstral Small 2$1.60
Which should you choose?
Which is better: Devstral Medium or Devstral Small 2?
Devstral Small 2 is the better all-round choice, scoring 67/100 against Devstral Medium (39). It leads on price, inputs & features and 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, Devstral Medium or Devstral Small 2?
Devstral Small 2 is cheaper at $0.10 input / $0.30 output per million tokens (median across 1 API provider). Devstral Medium 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 $0.15 per million tokens for Devstral Small 2 versus $0.80 for Devstral Medium (5.3× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Devstral Medium has not been scored yet and Devstral Small 2 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Devstral Medium and Devstral Small 2 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?
Devstral Small 2 has the largest context window at 262,144 tokens, against 128,000 for Devstral Medium. Maximum output per response: Devstral Medium up to 128,000, Devstral Small 2 up to 262,144 tokens.
Which can read images, PDFs, audio or video?
Devstral Medium accepts text; Devstral Small 2 accepts text and images. Devstral Small 2 handles the widest range of inputs.
Are any of these open source?
Devstral Small 2 publishes its weights (Apache-2.0) and can be self-hosted; Devstral Medium is proprietary.
Which is newer?
Devstral Small 2 is the newest, released Dec 9, 2025. Devstral Medium came out Jul 10, 2025. Knowledge cutoff: Devstral Medium May 2025, Devstral Small 2 Dec 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.
