Model comparison
Devstral Medium vs Grok 4.5
Grok 4.5 has enough public results to be ranked (#25); Devstral Medium does not yet, so treat this comparison as directional.
Last verified . 2 shared benchmarks.
Mistral AISummary
- They share 2 benchmarks with published results for both. Devstral Medium scores higher in 0 categories and Grok 4.5 in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 21.1.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 37.7% for Devstral Medium and 83.5% for Grok 4.5.
- Devstral Medium is cheaper at $0.40 / $2 per million input/output tokens, against $2 / $6 for Grok 4.5.
- Grok 4.5 accepts more context: 500K tokens versus 262K.
- Devstral Medium has downloadable open weights; the other is API-only.
Side by side
| Devstral Medium | Grok 4.5 | |
|---|---|---|
| Provider | Mistral AI | xAI |
| Noometry Index | 30.1 | 55.0 |
| Released | 2025-07-10 | 2026-07-08 |
| Weights | Open | Proprietary |
| Context window | 262K | 500K |
| Max output | 262K | 500K |
| Input $ / M tokens | $0.40 | $2 |
| Output $ / M tokens | $2 | $6 |
| Results tracked | 2 | 52 |
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Category by category
Coding Grok 4.5 leads
Devstral Medium: 24.3, Grok 4.5: 52.2 (#35)
| Benchmark | Devstral Medium | Grok 4.5 |
|---|---|---|
| LMArena WebDev | 1076 | 1553 |
| DeepSWE | — | 53.8% |
| FrontierCode | — | 42.4% |
| SciCode | — | 54.1% |
| WeirdML | — | 46.4% |
| LMArena Coding | — | 1474 |
| ALE-Bench | — | 1,309 |
Agentic & Tool Use Not comparable
Devstral Medium: —, Grok 4.5: 44.4 (#17)
| Benchmark | Devstral Medium | Grok 4.5 |
|---|---|---|
| APEX-Agents | — | 56.2% |
| τ²-bench Banking | — | 47.9% |
| PostTrainBench | — | 23.4% |
| GBAEval | — | 65.4% |
| GDP.pdf | — | 14% |
| LMArena Search | — | 1213 |
| Vending-Bench 2 | — | 3,887 |
Reasoning Grok 4.5 leads
Devstral Medium: 21.1, Grok 4.5: 56.1 (#25)
| Benchmark | Devstral Medium | Grok 4.5 |
|---|---|---|
| Kagi LLM Benchmark | 37.7% | 83.5% |
| ARC-AGI-2 | — | 52.6% |
| SimpleBench | — | 70% |
| NYT Connections (extended) | — | 79.9% |
| ARC-AGI-1 | — | 87.2% |
| CritPt | — | 15.4% |
| Chess Puzzles | — | 36% |
| LMArena Hard Prompts | — | 1462 |
| DTBench | — | 96.5% |
| LMCA | — | 45.2% |
| Surface Evolver Bench | — | 74.4% |
| Epoch Capabilities Index | — | 153.92 |
Math Not comparable
Devstral Medium: —, Grok 4.5: 60.9 (#35)
| Benchmark | Devstral Medium | Grok 4.5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 57.2% |
| FrontierMath Tier 4 | — | 24.4% |
| OTIS Mock AIME 2024-2025 | — | 97.8% |
| ProofBench | — | 31% |
| LMArena Math | — | 1459 |
Knowledge Not comparable
Devstral Medium: —, Grok 4.5: 62.3 (#24)
| Benchmark | Devstral Medium | Grok 4.5 |
|---|---|---|
| GPQA Diamond | — | 93.4% |
| SimpleQA Verified | — | 48.3% |
| LMArena Expert | — | 1466 |
Multimodal Not comparable
Devstral Medium: —, Grok 4.5: 37.6 (#72)
| Benchmark | Devstral Medium | Grok 4.5 |
|---|---|---|
| LMArena Vision | — | 1288 |
| Blueprint-Bench 2 | — | 27.3% |
| Furniture Assembly | — | 22.5% |
| LMArena Document | — | 1452 |
Multilingual Not comparable
Devstral Medium: —, Grok 4.5: 54.4 (#42)
| Benchmark | Devstral Medium | Grok 4.5 |
|---|---|---|
| LMArena Non-English | — | 1440 |
| LMArena Chinese | — | 1496 |
| LMArena French | — | 1456 |
| LMArena German | — | 1446 |
| LMArena Japanese | — | 1428 |
| LMArena Korean | — | 1404 |
| LMArena Russian | — | 1448 |
| LMArena Spanish | — | 1450 |
Instruction Following Not comparable
Devstral Medium: —, Grok 4.5: 76.0 (#48)
| Benchmark | Devstral Medium | Grok 4.5 |
|---|---|---|
| LMArena Instruction Following | — | 1446 |
Long Context Not comparable
Devstral Medium: —, Grok 4.5: 44.8 (#56)
| Benchmark | Devstral Medium | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | — | 1463 |
Writing & Preference Not comparable
Devstral Medium: —, Grok 4.5: 65.8 (#42)
| Benchmark | Devstral Medium | Grok 4.5 |
|---|---|---|
| LMArena Text | — | 1448 |
| LMArena Creative Writing | — | 1442 |
| EQ-Bench Creative Writing | — | 1579 |
| LMArena Multi-Turn | — | 1456 |
Frequently asked questions
Is Devstral Medium better than Grok 4.5?
Grok 4.5 has enough public results to be ranked (#25); Devstral Medium does not yet, so treat this comparison as directional.
Which is cheaper, Devstral Medium or Grok 4.5?
Devstral Medium is cheaper. It lists at $0.40 per million input tokens and $2 per million output tokens; Grok 4.5 lists at $2 and $6.
Is Devstral Medium or Grok 4.5 better for coding?
Grok 4.5 scores higher on coding benchmarks: 52.2 versus 24.3 in the Noometry coding category.
Which has the bigger context window?
Grok 4.5 does, with 500K tokens against 262K.
How many benchmarks do Devstral Medium and Grok 4.5 share?
2 benchmarks have published results for both models. Devstral Medium has 2 scored results on Noometry and Grok 4.5 has 52.