Devstral Medium
by Mistral AI · FranceA coding agent model trained on repository-scale edit trajectories.
Specification
The numbers
- Maker
- Mistral AI
- Released
- 2025-07
- Parameters
- Not reported
- Architecture
- Not reported
- Context window
- 131,072 tokens
- Max output
- 8,192 tokens
- Input
- Text
- Output
- Text
- Reasoning
- No
- Tool calling
- Yes
- Knowledge cutoff
- Not reported
- Licence
- Proprietary
- Availability
- Not reported
- Weights
- Not released
Cost
Price per million tokens
- Input
- $0.40 / M tokens
- Output
- $2.00 / M tokens
- Blended 3:1
- $0.80
Standard first-party API rate, excluding batch discounts. Reasoning models bill thinking tokens as output, so cost per answer can far exceed the cost per token suggests.
Published scores
Benchmarks
Figures published by Mistral AI or taken from a public leaderboard. Row last checked 2026-08.
| Category | Score | Rank |
|---|---|---|
| ReasoningMulti-step logic on problems that cannot be looked up | Not reported | — |
| MathsCompetition mathematics, graded on the final answer | Not reported | — |
| CodingSWE-bench Verified | 61.6% | 23 of 33 reporting the same tests |
| KnowledgeBreadth of factual recall under exam conditions | Not reported | — |
| MultimodalReading charts, diagrams and photographs | Not reported | — |
| Instruction followingObeying an exact, checkable format | Not reported | — |
| Human preferenceWhich answer people pick, blind | Not reported | — |
A category averages every benchmark in it that Devstral Medium reports. The rank counts only models that report the same tests, so it never compares an average over three benchmarks against an average over one.
Every reported test
| MMLU-ProKnowledge | Not reported | No figure published |
|---|---|---|
| GPQA DiamondReasoning | Not reported | No figure published |
| AIME 2025Maths | Not reported | No figure published |
| MATH-500Maths | Not reported | No figure published |
| SWE-bench VerifiedCoding | Rank 23 of 33 models reporting | |
| SWE-bench ProCoding | Not reported | No figure published |
| Terminal-Bench 2.1Coding | Not reported | No figure published |
| Frontier-Bench v0.1Reasoning | Not reported | No figure published |
| Terminal-Bench 4.0Coding | Not reported | No figure published |
| LiveCodeBenchCoding | Not reported | No figure published |
| HumanEvalCoding | Not reported | No figure published |
| MMMUMultimodal | Not reported | No figure published |
| IFEvalInstruction following | Not reported | No figure published |
| LMArena EloHuman preference | Not reported | No figure published |
Where these numbers come from
Every score on this page is a published figure, taken from the model's own card, system card, technical report or release post, or from a public leaderboard. CorX Labs did not run these evaluations. Most are self-reported by the lab that built the model, which means they were produced under that lab's own choice of prompt, scaffold and number of attempts — so treat them as a starting point for a shortlist, not as a settled ranking.
A score someone other than the model's maker measured is marked Independent and names its measurer. Those are the stronger numbers on this page — an outside harness has no reason to flatter anyone — and there are not many of them.
Where a figure has not been published, the cell reads Not reported rather than an estimate. Nothing here is inferred, interpolated or guessed. Each model records the month its row was last checked. Full method and caveats.
Same maker
Other models from Mistral AI
| Codestral 25.08Mistral AI | Mistral AI | 262K | $0.30 | $0.90 | — | — | — | — | Mistral AI Non-Production |
| Magistral MediumMistral AI | Mistral AI | 41K | $2.00 | $5.00 | — | 70.8% | 73.6% | — | Proprietary |
| Magistral SmallMistral AI | Mistral AI | 41K | $0.50 | $1.50 | — | 68.2% | 70.7% | — | Apache 2.0 |
| Mistral Small 3.2 24BMistral AI | Mistral AI | 131K | $0.10 | $0.30 | 69.1% | 46.1% | — | — | Apache 2.0 |
| Mistral Medium 3Mistral AI | Mistral AI | 131K | $0.40 | $2.00 | 76% | 62.4% | — | — | Proprietary |
| Mistral Large 2Mistral AI | Mistral AI | 131K | $2.00 | $6.00 | 69.9% | 48% | — | — | Mistral Research |
| Pixtral LargeMistral AI | Mistral AI | 131K | $2.00 | $6.00 | — | — | — | — | Mistral Research |
| Ministral 8BMistral AI | Mistral AI | 131K | $0.10 | $0.10 | 47% | — | — | — | Mistral Research |
| Mistral NeMo 12BMistral AI | Mistral AI | 131K | $0.03 | $0.070 | 50% | — | — | — | Apache 2.0 |
| Mixtral 8x22BMistral AI | Mistral AI | 66K | $0.90 | $0.90 | 56% | — | — | — | Apache 2.0 |
| Mistral 7BMistral AI | Mistral AI | 33K | $0.025 | $0.025 | 30% | — | — | — | Apache 2.0 |