Devstral Small vs Devstral Medium
Devstral Small comes out ahead, 57 to 39 on our weighted score, and it is the cheaper option too.
- Our pick
Mistral AIDevstral Small
57/100- ECI—
- Price$0.10 / $0.30
- Context128K
- Mistral AI
Devstral Medium
39/100- ECI—
- Price$0.40 / $2.00
- Context128K
Add a model
Make it a three-way comparison.
Devstral Small is our pick
Devstral Small is the better all-round choice, scoring 57/100 against Devstral Medium (39). It leads on price. 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 SmallDevstral Small $0.15 · Devstral Medium $0.80 per 1M tokens (3:1 blend)
- Longest contextAbout the sameDevstral Small 128,000 · Devstral Medium 128,000 tokens
- Widest inputsSame inputsDevstral Small: Text · Devstral Medium: Text
- Self-hostingDevstral SmallPublishes downloadable weights
| Measure | Weight | Devstral Small | Devstral Medium |
|---|---|---|---|
| Price | 50% | 89 | 54 |
| Inputs & features | 30% | 25 | 25 |
| Context window | 20% | 24 | 24 |
| Overall | 100% | 57/100 | 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 | Devstral SmallMistral AI | Devstral MediumMistral AI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.10 (best) | $0.40 |
| Output | $0.30 (best) | $2.00 |
| Cached input | — | — |
| Blended (3:1) | $0.15 (best) | $0.80 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Mistral API | Official Mistral API |
| Limits | ||
| Context window | 128,000 tokens | 128,000 tokens |
| Max output | 128,000 tokens | 128,000 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | No | No |
| Tool calling | Yes | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Open | Proprietary |
| API model ID | devstral-small-2507 | devstral-medium-2507 |
| API providers | 2 | 2 |
| Released | Jul 10, 2025 | Jul 10, 2025 |
| Knowledge cutoff | May 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.
- Devstral Small$1.60
- Devstral Medium$8.00
Which should you choose?
Which is better: Devstral Small or Devstral Medium?
Devstral Small is the better all-round choice, scoring 57/100 against Devstral Medium (39). It leads on price. 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 Small or Devstral Medium?
Devstral Small is cheaper at $0.10 input / $0.30 output per million tokens (official Mistral API price). 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 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 Small has not been scored yet and Devstral Medium has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Devstral Small and Devstral Medium 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 and Devstral Medium share the same 128,000-token context window. Maximum output per response: Devstral Small up to 128,000, Devstral Medium up to 128,000 tokens.
Which can read images, PDFs, audio or video?
Devstral Small accepts text; Devstral Medium accepts text. They handle the same number of input types.
Are any of these open source?
Devstral Small publishes its weights and can be self-hosted; Devstral Medium is proprietary.
Which is newer?
Devstral Small is the newest, released Jul 10, 2025. Devstral Medium came out Jul 10, 2025. Knowledge cutoff: Devstral Small May 2025, Devstral Medium 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.
