# GPT-5.3 Chat vs Mistral 7B

> GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 22.9 on the Noometry Index. Mistral 7B costs 19× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-mistral-7b
- Last updated: 2026-10-10
- Shared benchmarks: 16

## Summary

- They share 16 benchmarks with published results for both. GPT-5.3 Chat scores higher in 8 categories and Mistral 7B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.3 to 30.9.
- Mistral 7B is cheaper at $0.25 / $0.25 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- GPT-5.3 Chat accepts more context: 128K tokens versus 8K.
- Mistral 7B has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.3 Chat | Mistral 7B |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 42.1 | 22.9 |
| Rank | 109 | 346 |
| Context | 128K | 8K |
| Input $/M | $1.75 | $0.25 |
| Output $/M | $14 | $0.25 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.3 Chat: 40.8 (#124)
- Mistral 7B: 25.9 (#321)

| Benchmark | GPT-5.3 Chat | Mistral 7B |
|---|---|---|
| LMArena Coding | 1408 | 1082 |
| BigCodeBench Instruct | — | 19.5% |
| BigCodeBench Complete | — | 27.3% |
| HumanEval+ | — | 36% |
| MBPP+ | — | 42.1% |

## Reasoning

- GPT-5.3 Chat: 27.3 (#105)
- Mistral 7B: 12.6 (#331)

| Benchmark | GPT-5.3 Chat | Mistral 7B |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1067 |
| Chess Puzzles | — | 0% |
| DTBench | — | 42.5% |
| Adversarial NLI | — | 47.1% |
| BIG-Bench Hard | — | 56.1% |
| Epoch Capabilities Index | — | 111.97 |
| HellaSwag | — | 81% |
| PIQA | — | 83% |
| WinoGrande | — | 75.3% |

## Math

- GPT-5.3 Chat: 35.4 (#146)
- Mistral 7B: 7.6 (#319)

| Benchmark | GPT-5.3 Chat | Mistral 7B |
|---|---|---|
| LMArena Math | 1389 | 1085 |
| OTIS Mock AIME 2024-2025 | — | 0.3% |
| MATH Level 5 | — | 3.7% |
| GSM8K | — | 54.4% |

## Knowledge

- GPT-5.3 Chat: 38.2 (#137)
- Mistral 7B: 7.3 (#306)

| Benchmark | GPT-5.3 Chat | Mistral 7B |
|---|---|---|
| LMArena Expert | 1397 | 1036 |
| GPQA Diamond | — | 15.2% |
| ARC (AI2) Challenge | — | 78.6% |
| BoolQ | — | 87.4% |
| MMLU | — | 62.5% |
| OpenBookQA | — | 79.8% |
| TriviaQA | — | 75.2% |

## Multilingual

- GPT-5.3 Chat: 50.5 (#119)
- Mistral 7B: 26.0 (#278)

| Benchmark | GPT-5.3 Chat | Mistral 7B |
|---|---|---|
| LMArena Non-English | 1383 | 1012 |
| LMArena Chinese | 1433 | 1009 |
| LMArena French | 1398 | 1036 |
| LMArena German | 1384 | 987 |
| LMArena Japanese | 1351 | 878 |
| LMArena Russian | 1400 | 1018 |
| LMArena Spanish | 1371 | 1026 |
| LMArena Korean | 1347 | — |

## Instruction Following

- GPT-5.3 Chat: 73.0 (#124)
- Mistral 7B: 54.5 (#275)

| Benchmark | GPT-5.3 Chat | Mistral 7B |
|---|---|---|
| LMArena Instruction Following | 1378 | 1060 |

## Long Context

- GPT-5.3 Chat: 42.6 (#115)
- Mistral 7B: 32.2 (#266)

| Benchmark | GPT-5.3 Chat | Mistral 7B |
|---|---|---|
| LMArena Longer Query | 1396 | 1060 |

## Writing & Preference

- GPT-5.3 Chat: 63.3 (#65)
- Mistral 7B: 30.9 (#281)

| Benchmark | GPT-5.3 Chat | Mistral 7B |
|---|---|---|
| LMArena Text | 1389 | 1090 |
| LMArena Creative Writing | 1356 | 1068 |
| LMArena Multi-Turn | 1413 | 1062 |
| EQ-Bench Creative Writing | 1690 | — |

## FAQ

### Is GPT-5.3 Chat better than Mistral 7B?

GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 22.9 on the Noometry Index. Mistral 7B costs 19× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.3 Chat or Mistral 7B?

Mistral 7B is cheaper. It lists at $0.25 per million input tokens and $0.25 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

### Is GPT-5.3 Chat or Mistral 7B better for coding?

GPT-5.3 Chat scores higher on coding benchmarks: 40.8 versus 25.9 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.3 Chat does, with 128K tokens against 8K.

### How many benchmarks do GPT-5.3 Chat and Mistral 7B share?

16 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Mistral 7B has 37.