Model comparison
Devstral Medium vs Gemini 3.5 Flash
Gemini 3.5 Flash has enough public results to be ranked (#32); Devstral Medium does not yet, so treat this comparison as directional.
Last verified . 1 shared benchmarks.
Mistral AI
GoogleSummary
- They share 1 benchmark with published results for both. Devstral Medium scores higher in 0 categories and Gemini 3.5 Flash in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.5 Flash leads 62.8 to 21.1.
- Devstral Medium is cheaper at $0.40 / $2 per million input/output tokens, against $1.50 / $9 for Gemini 3.5 Flash.
- Gemini 3.5 Flash accepts more context: 1.05M tokens versus 262K.
- Devstral Medium has downloadable open weights; the other is API-only.
Side by side
| Devstral Medium | Gemini 3.5 Flash | |
|---|---|---|
| Provider | Mistral AI | |
| Noometry Index | 30.1 | 54.2 |
| Released | 2025-07-10 | 2026-05-19 |
| Weights | Open | Proprietary |
| Context window | 262K | 1.05M |
| Max output | 262K | 66K |
| Input $ / M tokens | $0.40 | $1.50 |
| Output $ / M tokens | $2 | $9 |
| Results tracked | 2 | 54 |
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Category by category
Coding Gemini 3.5 Flash leads
Devstral Medium: 24.3, Gemini 3.5 Flash: 49.4 (#49)
| Benchmark | Devstral Medium | Gemini 3.5 Flash |
|---|---|---|
| LMArena WebDev | 1076 | 1499 |
| SWE-bench Verified | — | 79.3% |
| DeepSWE | — | 37.4% |
| SciCode | — | 53.1% |
| WeirdML | — | 62.6% |
| LMArena Coding | — | 1492 |
| ALE-Bench | — | 911.02 |
Agentic & Tool Use Not comparable
Devstral Medium: —, Gemini 3.5 Flash: 24.7 (#114)
| Benchmark | Devstral Medium | Gemini 3.5 Flash |
|---|---|---|
| APEX-Agents | — | 27.5% |
| GBAEval | — | 6.7% |
| GDP.pdf | — | 14% |
| Vending-Bench 2 | — | 5,396 |
Reasoning Gemini 3.5 Flash leads
Devstral Medium: 21.1, Gemini 3.5 Flash: 62.8 (#18)
| Benchmark | Devstral Medium | Gemini 3.5 Flash |
|---|---|---|
| ARC-AGI-2 | — | 72.1% |
| SimpleBench | — | 76.7% |
| Kagi LLM Benchmark | 37.7% | — |
| NYT Connections (extended) | — | 92.6% |
| ARC-AGI-1 | — | 92.5% |
| CritPt | — | 13.1% |
| Chess Puzzles | — | 50% |
| EnigmaEval | — | 25.4% |
| EBR-Bench | — | 4.8% |
| LMArena Hard Prompts | — | 1488 |
| Mystery Game Puzzles | — | 32% |
| DTBench | — | 94.7% |
| LMCA | — | 47.1% |
| Surface Evolver Bench | — | 58.1% |
| Epoch Capabilities Index | — | 154.46 |
| ForecastBench | — | 59 |
Math Not comparable
Devstral Medium: —, Gemini 3.5 Flash: 60.7 (#36)
| Benchmark | Devstral Medium | Gemini 3.5 Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 62.8% |
| FrontierMath Tier 4 | — | 26.8% |
| MathArena Final-Answer Competitions | — | 76.3% |
| OTIS Mock AIME 2024-2025 | — | 95.6% |
| ProofBench | — | 31% |
| LMArena Math | — | 1504 |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Tier 4 (v1) | — | 14.6% |
Knowledge Not comparable
Devstral Medium: —, Gemini 3.5 Flash: 66.3 (#11)
| Benchmark | Devstral Medium | Gemini 3.5 Flash |
|---|---|---|
| GPQA Diamond | — | 92.8% |
| SimpleQA Verified | — | 66.2% |
| LMArena Expert | — | 1495 |
Multimodal Not comparable
Devstral Medium: —, Gemini 3.5 Flash: 45.7 (#15)
| Benchmark | Devstral Medium | Gemini 3.5 Flash |
|---|---|---|
| LMArena Vision | — | 1310 |
| Blueprint-Bench 2 | — | 33.6% |
| LMArena Document | — | 1463 |
Multilingual Not comparable
Devstral Medium: —, Gemini 3.5 Flash: 57.0 (#13)
| Benchmark | Devstral Medium | Gemini 3.5 Flash |
|---|---|---|
| LMArena Non-English | — | 1476 |
| LMArena Chinese | — | 1526 |
| LMArena French | — | 1490 |
| LMArena German | — | 1492 |
| LMArena Japanese | — | 1486 |
| LMArena Korean | — | 1451 |
| LMArena Russian | — | 1493 |
| LMArena Spanish | — | 1480 |
Instruction Following Not comparable
Devstral Medium: —, Gemini 3.5 Flash: 77.0 (#30)
| Benchmark | Devstral Medium | Gemini 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | — | 1467 |
Long Context Not comparable
Devstral Medium: —, Gemini 3.5 Flash: 45.4 (#38)
| Benchmark | Devstral Medium | Gemini 3.5 Flash |
|---|---|---|
| LMArena Longer Query | — | 1482 |
Writing & Preference Not comparable
Devstral Medium: —, Gemini 3.5 Flash: 65.5 (#47)
| Benchmark | Devstral Medium | Gemini 3.5 Flash |
|---|---|---|
| LMArena Text | — | 1482 |
| LMArena Creative Writing | — | 1470 |
| EQ-Bench 4 | — | 1087 |
| LMArena Multi-Turn | — | 1481 |
Frequently asked questions
Is Devstral Medium better than Gemini 3.5 Flash?
Gemini 3.5 Flash has enough public results to be ranked (#32); Devstral Medium does not yet, so treat this comparison as directional.
Which is cheaper, Devstral Medium or Gemini 3.5 Flash?
Devstral Medium is cheaper. It lists at $0.40 per million input tokens and $2 per million output tokens; Gemini 3.5 Flash lists at $1.50 and $9.
Is Devstral Medium or Gemini 3.5 Flash better for coding?
Gemini 3.5 Flash scores higher on coding benchmarks: 49.4 versus 24.3 in the Noometry coding category.
Which has the bigger context window?
Gemini 3.5 Flash does, with 1.05M tokens against 262K.
How many benchmarks do Devstral Medium and Gemini 3.5 Flash share?
1 benchmark has published results for both models. Devstral Medium has 2 scored results on Noometry and Gemini 3.5 Flash has 54.