Mistral Medium 3.1 vs Mistral Medium 3
Too close to call on our weighted score (Mistral Medium 3.1 50, Mistral Medium 3 47). The right pick depends on what you value most.
Mistral AIMistral Medium 3.1
50/100- ECI—
- Price$0.40 / $2.00
- Context262K
- Mistral AI
Mistral Medium 3
47/100- ECI134.1
- Price$0.40 / $2.00
- Context131K
Add a model
Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within 2 points (Mistral Medium 3.1 50/100, Mistral Medium 3 47/100), so choose by what matters most for your work: Mistral Medium 3.1 on price and Mistral Medium 3.1 for long inputs. 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 priceSame priceMistral Medium 3.1 $0.80 · Mistral Medium 3 $0.80 per 1M tokens (3:1 blend)
- Longest contextMistral Medium 3.1Mistral Medium 3.1 262,144 · Mistral Medium 3 131,072 tokens
- Widest inputsSame inputsMistral Medium 3.1: Text, Images · Mistral Medium 3: Text, Images
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Mistral Medium 3.1 | Mistral Medium 3 |
|---|---|---|---|
| Price | 50% | 54 | 54 |
| Inputs & features | 30% | 50 | 50 |
| Context window | 20% | 37 | 24 |
| Overall | 100% | 50/100 | 47/100 |
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 | Mistral Medium 3.1Mistral AI | Mistral Medium 3Mistral AI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | 134.1 |
| ECI rank | — | #117 of 148 |
| GPQA DiamondGraduate-level science questions | — | 59.5% |
| OTIS Mock AIME 2024–2025Competition mathematics | — | 32.2% |
| Price per million tokens | ||
| Input | $0.40 | $0.40 |
| Output | $2.00 | $2.00 |
| Cached input | — | — |
| Blended (3:1) | $0.80 | $0.80 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Mistral API | Official Mistral API |
| Limits | ||
| Context window | 262,144 tokens (best) | 131,072 tokens |
| Max output | 262,144 tokens (best) | 131,072 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | No | No |
| Tool calling | Yes | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | mistral-medium-2508 | mistral-medium-2505 |
| API providers | 1 | 5 (best) |
| Released | Aug 12, 2025 | May 7, 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.
- Mistral Medium 3.1$8.00
- Mistral Medium 3$8.00
Which should you choose?
Which is better: Mistral Medium 3.1 or Mistral Medium 3?
It is close. Our weighted score puts them within 2 points (Mistral Medium 3.1 50/100, Mistral Medium 3 47/100), so choose by what matters most for your work: Mistral Medium 3.1 on price and Mistral Medium 3.1 for long inputs. 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, Mistral Medium 3.1 or Mistral Medium 3?
Mistral Medium 3.1 and Mistral Medium 3 cost the same: $0.40 input / $2.00 output per million tokens.
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Mistral Medium 3.1 has not been scored yet and Mistral Medium 3 has an ECI of 134.1.
Which is better for coding?
There are no published SWE-bench Verified results for Mistral Medium 3.1 and Mistral Medium 3 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?
Mistral Medium 3.1 has the largest context window at 262,144 tokens, against 131,072 for Mistral Medium 3. Maximum output per response: Mistral Medium 3.1 up to 262,144, Mistral Medium 3 up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Mistral Medium 3.1 accepts text and images; Mistral Medium 3 accepts text and images. They handle the same number of input types.
Are any of these open source?
No. Mistral Medium 3.1 and Mistral Medium 3 are proprietary and only available through APIs and apps.
Which is newer?
Mistral Medium 3.1 is the newest, released Aug 12, 2025. Mistral Medium 3 came out May 7, 2025. Knowledge cutoff: Mistral Medium 3.1 May 2025, Mistral Medium 3 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.
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