# Command A vs GPT-5.1

> GPT-5.1 is the stronger model overall, scoring 49.0 to 36.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/command-a-vs-gpt-5-1
- Last updated: 2026-10-11
- Shared benchmarks: 20

## Summary

- They share 20 benchmarks with published results for both. Command A scores higher in 1 category and GPT-5.1 in 8 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.1 leads 39.8 to 18.3.
- The biggest single-benchmark swing is LMCA: 10.3% for Command A and 43.9% for GPT-5.1.
- GPT-5.1 is cheaper at $1.25 / $10 per million input/output tokens, against $2.50 / $10 for Command A.
- GPT-5.1 accepts more context: 400K tokens versus 256K.
- Command A has downloadable open weights; the other is API-only.

## Snapshot

| | Command A | GPT-5.1 |
|---|---|---|
| Provider | Cohere | OpenAI |
| Noometry Index | 36.5 | 49.0 |
| Rank | 215 | 53 |
| Context | 256K | 400K |
| Input $/M | $2.50 | $1.25 |
| Output $/M | $10 | $10 |
| Weights | Open | Proprietary |

## Coding

- Command A: 27.2 (#322)
- GPT-5.1: 46.4 (#66)

| Benchmark | Command A | GPT-5.1 |
|---|---|---|
| LMArena Coding | 1330 | 1454 |
| SWE-bench Verified | — | 68% |
| SWE-bench Verified (bash only) | — | 66% |
| Aider Polyglot | 12% | — |
| LMArena WebDev | — | 1395 |
| SciCode | — | 43.3% |
| GSO | — | 13.7% |
| WeirdML | — | 60.8% |
| LiveBench Coding | — | 72.5% |
| ALE-Bench | — | 1,192 |

## Agentic & Tool Use

- Command A: 35.9 (#40)
- GPT-5.1: 32.7 (#60)

| Benchmark | Command A | GPT-5.1 |
|---|---|---|
| Terminal-Bench | — | 47.6% |
| Berkeley Function Calling Leaderboard | 57.1% | — |
| DeepResearch Bench | — | 42.8% |
| LMArena Search | — | 1199 |
| Vending-Bench 2 | — | 1,473 |

## Reasoning

- Command A: 18.3 (#283)
- GPT-5.1: 39.8 (#58)

| Benchmark | Command A | GPT-5.1 |
|---|---|---|
| LMArena Hard Prompts | 1326 | 1457 |
| DTBench | 61.3% | 90.1% |
| LMCA | 10.3% | 43.9% |
| ARC-AGI-2 | — | 17.6% |
| SimpleBench | — | 53.2% |
| Kagi LLM Benchmark | 28.8% | — |
| ARC-AGI-1 | — | 72.8% |
| CritPt | — | 4.9% |
| Chess Puzzles | — | 32% |
| EnigmaEval | — | 11.2% |
| LiveBench Reasoning | — | 95.8% |
| Mystery Game Puzzles | — | 19% |
| LiveBench Data Analysis | — | 72.1% |
| Epoch Capabilities Index | — | 149.64 |
| ForecastBench | — | 58.1 |
| LiveBench | — | 78.8% |

## Math

- Command A: 36.2 (#171)
- GPT-5.1: 52.2 (#51)

| Benchmark | Command A | GPT-5.1 |
|---|---|---|
| LMArena Math | 1300 | 1447 |
| OTIS Mock AIME 2024-2025 | — | 88.6% |
| Omni-MATH | — | 46.4% |
| LiveBench Math | — | 94.5% |
| FrontierMath (Feb 2025 set) | — | 31% |
| FrontierMath Tier 4 (v1) | — | 12.5% |

## Knowledge

- Command A: 37.1 (#159)
- GPT-5.1: 50.6 (#71)

| Benchmark | Command A | GPT-5.1 |
|---|---|---|
| Vectara Hallucination Rate | 9.3% | 10.9% |
| LMArena Expert | 1295 | 1470 |
| GPQA Diamond | — | 87.6% |
| Humanity's Last Exam | — | 23.7% |
| SimpleQA Verified | — | 48% |
| MMLU-Pro | — | 57.9% |
| GPQA (HELM) | — | 44.2% |

## Multimodal

- Command A: —
- GPT-5.1: 44.8 (#19)

| Benchmark | Command A | GPT-5.1 |
|---|---|---|
| LMArena Vision | — | 1250 |
| VPCT | — | 58.7% |
| LMArena Document | — | 1403 |

## Multilingual

- Command A: 45.3 (#170)
- GPT-5.1: 53.8 (#56)

| Benchmark | Command A | GPT-5.1 |
|---|---|---|
| LMArena Non-English | 1313 | 1431 |
| LMArena Chinese | 1327 | 1495 |
| LMArena French | 1351 | 1450 |
| LMArena German | 1341 | 1438 |
| LMArena Japanese | 1285 | 1453 |
| LMArena Korean | 1285 | 1401 |
| LMArena Russian | 1314 | 1435 |
| LMArena Spanish | 1347 | 1433 |

## Instruction Following

- Command A: 69.1 (#177)
- GPT-5.1: 83.9 (#1)

| Benchmark | Command A | GPT-5.1 |
|---|---|---|
| LMArena Instruction Following | 1309 | 1443 |
| LiveBench Instruction Following | — | 93.3% |
| IFEval | — | 93.5% |

## Long Context

- Command A: 40.6 (#151)
- GPT-5.1: 47.6 (#14)

| Benchmark | Command A | GPT-5.1 |
|---|---|---|
| LMArena Longer Query | 1334 | 1447 |
| CL-bench | — | 23.7% |
| CL-bench Life | — | 17.3% |

## Writing & Preference

- Command A: 47.6 (#208)
- GPT-5.1: 64.5 (#55)

| Benchmark | Command A | GPT-5.1 |
|---|---|---|
| LMArena Text | 1331 | 1443 |
| LMArena Creative Writing | 1319 | 1427 |
| LMArena Multi-Turn | 1339 | 1450 |
| EQ-Bench Creative Writing | 1145 | — |
| WildBench | — | 86.3% |
| LiveBench Language | — | 80.2% |

## FAQ

### Is Command A better than GPT-5.1?

GPT-5.1 is the stronger model overall, scoring 49.0 to 36.5 on the Noometry Index.

### Which is cheaper, Command A or GPT-5.1?

GPT-5.1 is cheaper. It lists at $1.25 per million input tokens and $10 per million output tokens; Command A lists at $2.50 and $10.

### Is Command A or GPT-5.1 better for coding?

GPT-5.1 scores higher on coding benchmarks: 46.4 versus 27.2 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.1 does, with 400K tokens against 256K.

### How many benchmarks do Command A and GPT-5.1 share?

20 benchmarks have published results for both models. Command A has 24 scored results on Noometry and GPT-5.1 has 63.