Model comparison
Command A vs Grok 4 Fast
Grok 4 Fast is the stronger model overall, scoring 39.0 to 35.9 on the Noometry Index.
Last verified . 20 shared benchmarks.
CohereSummary
- They share 20 benchmarks with published results for both. Command A scores higher in 2 categories and Grok 4 Fast in 7 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 40.6.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 28.8% for Command A and 66.1% for Grok 4 Fast.
- Command A has downloadable open weights; the other is API-only.
Side by side
| Command A | Grok 4 Fast | |
|---|---|---|
| Provider | Cohere | xAI |
| Noometry Index | 35.9 | 39.0 |
| Released | 2025-03-13 | 2025-09-19 |
| Weights | Open | Proprietary |
| Context window | 256K | — |
| Max output | 8K | — |
| Input $ / M tokens | $2.50 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 24 | 30 |
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Category by category
Coding Grok 4 Fast leads
Command A: 26.8 (#317), Grok 4 Fast: 32.3 (#264)
| Benchmark | Command A | Grok 4 Fast |
|---|---|---|
| LMArena Coding | 1331 | 1429 |
| Aider Polyglot | 12% | — |
| LMArena WebDev | — | 1160 |
| WeirdML | — | 42.9% |
Agentic & Tool Use Command A leads
Command A: 35.7 (#36), Grok 4 Fast: 29.3 (#80)
| Benchmark | Command A | Grok 4 Fast |
|---|---|---|
| Berkeley Function Calling Leaderboard | 57.1% | — |
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |
Reasoning Grok 4 Fast leads
Command A: 17.7 (#276), Grok 4 Fast: 22.5 (#179)
| Benchmark | Command A | Grok 4 Fast |
|---|---|---|
| Kagi LLM Benchmark | 28.8% | 66.1% |
| LMArena Hard Prompts | 1326 | 1413 |
| DTBench | 61.3% | 82.7% |
| ARC-AGI-2 | — | 5.3% |
| ARC-AGI-1 | — | 48.5% |
| LMCA | 10.3% | — |
| Epoch Capabilities Index | — | 144.21 |
| ForecastBench | — | 60.5 |
Math Grok 4 Fast leads
Command A: 33.5 (#172), Grok 4 Fast: 36.1 (#126)
| Benchmark | Command A | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1300 | 1419 |
Knowledge Command A leads
Command A: 36.5 (#157), Grok 4 Fast: 31.5 (#211)
| Benchmark | Command A | Grok 4 Fast |
|---|---|---|
| Vectara Hallucination Rate | 9.3% | 19.7% |
| LMArena Expert | 1295 | 1411 |
Multilingual Grok 4 Fast leads
Command A: 45.5 (#166), Grok 4 Fast: 51.5 (#106)
| Benchmark | Command A | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1313 | 1397 |
| LMArena Chinese | 1327 | 1458 |
| LMArena French | 1352 | 1433 |
| LMArena German | 1341 | 1383 |
| LMArena Japanese | 1283 | 1358 |
| LMArena Korean | 1285 | 1359 |
| LMArena Russian | 1314 | 1387 |
| LMArena Spanish | 1346 | 1414 |
Instruction Following Grok 4 Fast leads
Command A: 69.3 (#172), Grok 4 Fast: 73.4 (#116)
| Benchmark | Command A | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1309 | 1388 |
Long Context Grok 4 Fast leads
Command A: 40.6 (#147), Grok 4 Fast: 63.2 (#3)
| Benchmark | Command A | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1334 | 1415 |
| Fiction.LiveBench | — | 94.4% |
Writing & Preference Grok 4 Fast leads
Command A: 47.8 (#204), Grok 4 Fast: 60.2 (#96)
| Benchmark | Command A | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1331 | 1407 |
| LMArena Creative Writing | 1319 | 1388 |
| LMArena Multi-Turn | 1338 | 1414 |
| EQ-Bench Creative Writing | 1145 | — |
Frequently asked questions
Is Command A better than Grok 4 Fast?
Grok 4 Fast is the stronger model overall, scoring 39.0 to 35.9 on the Noometry Index.
Is Command A or Grok 4 Fast better for coding?
Grok 4 Fast scores higher on coding benchmarks: 32.3 versus 26.8 in the Noometry coding category.
How many benchmarks do Command A and Grok 4 Fast share?
20 benchmarks have published results for both models. Command A has 24 scored results on Noometry and Grok 4 Fast has 30.