Model comparison
Devstral Small 2505 vs Grok 4.20 Multi-Agent
Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 34.3 on the Noometry Index. Devstral Small 2505 costs 10× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Mistral AISummary
- The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 43.9 to 19.7.
- Devstral Small 2505 is cheaper at $0.10 / $0.30 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.
- Grok 4.20 Multi-Agent accepts more context: 1M tokens versus 128K.
- Devstral Small 2505 has downloadable open weights; the other is API-only.
Side by side
| Devstral Small 2505 | Grok 4.20 Multi-Agent | |
|---|---|---|
| Provider | Mistral AI | xAI |
| Noometry Index | 34.3 | 46.2 |
| Released | 2025-05-07 | 2026-03-09 |
| Weights | Open | Proprietary |
| Context window | 128K | 1M |
| Max output | 128K | 30K |
| Input $ / M tokens | $0.10 | $1.25 |
| Output $ / M tokens | $0.30 | $2.50 |
| Results tracked | 4 | 20 |
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Category by category
Coding Grok 4.20 Multi-Agent leads
Devstral Small 2505: 38.9 (#166), Grok 4.20 Multi-Agent: 43.0 (#92)
| Benchmark | Devstral Small 2505 | Grok 4.20 Multi-Agent |
|---|---|---|
| SWE-bench Verified (bash only) | 56.4% | — |
| SciCode | 28.8% | — |
| LMArena Coding | — | 1457 |
Agentic & Tool Use Not comparable
Devstral Small 2505: —, Grok 4.20 Multi-Agent: —
| Benchmark | Devstral Small 2505 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Search | — | 1204 |
Reasoning Grok 4.20 Multi-Agent leads
Devstral Small 2505: 19.7 (#252), Grok 4.20 Multi-Agent: 43.9 (#48)
| Benchmark | Devstral Small 2505 | Grok 4.20 Multi-Agent |
|---|---|---|
| Kagi LLM Benchmark | 37.7% | — |
| NYT Connections (extended) | — | 89.6% |
| CritPt | 0% | — |
| LMArena Hard Prompts | — | 1448 |
Math Not comparable
Devstral Small 2505: —, Grok 4.20 Multi-Agent: 39.4 (#104)
| Benchmark | Devstral Small 2505 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Math | — | 1442 |
Knowledge Not comparable
Devstral Small 2505: —, Grok 4.20 Multi-Agent: 40.4 (#119)
| Benchmark | Devstral Small 2505 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Expert | — | 1445 |
Multimodal Not comparable
Devstral Small 2505: —, Grok 4.20 Multi-Agent: 40.5 (#48)
| Benchmark | Devstral Small 2505 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Vision | — | 1259 |
Multilingual Not comparable
Devstral Small 2505: —, Grok 4.20 Multi-Agent: 54.4 (#43)
| Benchmark | Devstral Small 2505 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Non-English | — | 1440 |
| LMArena Chinese | — | 1475 |
| LMArena French | — | 1466 |
| LMArena German | — | 1456 |
| LMArena Japanese | — | 1405 |
| LMArena Korean | — | 1416 |
| LMArena Russian | — | 1457 |
| LMArena Spanish | — | 1447 |
Instruction Following Not comparable
Devstral Small 2505: —, Grok 4.20 Multi-Agent: 74.8 (#84)
| Benchmark | Devstral Small 2505 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Instruction Following | — | 1420 |
Long Context Not comparable
Devstral Small 2505: —, Grok 4.20 Multi-Agent: 43.7 (#88)
| Benchmark | Devstral Small 2505 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Longer Query | — | 1431 |
Writing & Preference Not comparable
Devstral Small 2505: —, Grok 4.20 Multi-Agent: 64.0 (#59)
| Benchmark | Devstral Small 2505 | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Text | — | 1450 |
| LMArena Creative Writing | — | 1436 |
| LMArena Multi-Turn | — | 1452 |
Frequently asked questions
Is Devstral Small 2505 better than Grok 4.20 Multi-Agent?
Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 34.3 on the Noometry Index. Devstral Small 2505 costs 10× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.
Which is cheaper, Devstral Small 2505 or Grok 4.20 Multi-Agent?
Devstral Small 2505 is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.
Is Devstral Small 2505 or Grok 4.20 Multi-Agent better for coding?
Grok 4.20 Multi-Agent scores higher on coding benchmarks: 43.0 versus 38.9 in the Noometry coding category.
Which has the bigger context window?
Grok 4.20 Multi-Agent does, with 1M tokens against 128K.
How many benchmarks do Devstral Small 2505 and Grok 4.20 Multi-Agent share?
0 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and Grok 4.20 Multi-Agent has 20.