# GPT-5.4 vs Mistral Small 3

> GPT-5.4 is the stronger model overall, scoring 59.4 to 31.2 on the Noometry Index. Mistral Small 3 costs 98× less per token, which makes it the better buy when GPT-5.4's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-4-vs-mistral-small-3
- Last updated: 2026-10-11
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. GPT-5.4 scores higher in 8 categories and Mistral Small 3 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.4 leads 73.5 to 16.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 97.8% for GPT-5.4 and 6.7% for Mistral Small 3.
- Mistral Small 3 is cheaper at $0.05 / $0.08 per million input/output tokens, against $2.50 / $15 for GPT-5.4.
- GPT-5.4 accepts more context: 1.05M tokens versus 33K.
- Mistral Small 3 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 59.4 | 31.2 |
| Rank | 16 | 278 |
| Context | 1.05M | 33K |
| Input $/M | $2.50 | $0.05 |
| Output $/M | $15 | $0.08 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.4: 52.6 (#33)
- Mistral Small 3: 36.5 (#207)

| Benchmark | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| LMArena Coding | 1497 | 1246 |
| SWE-bench Verified | 76.9% | — |
| DeepSWE | 51.8% | — |
| LMArena WebDev | 1465 | — |
| SciCode | 56.6% | — |
| GSO | 31.4% | — |
| WeirdML | 77.7% | — |
| BigCodeBench Instruct | — | 45.3% |
| MirrorCode | 15.6% | — |
| BigCodeBench Complete | — | 50.4% |
| ALE-Bench | 1,607 | — |
| AlgoTune | 1.85 | — |

## Agentic & Tool Use

- GPT-5.4: 46.5 (#13)
- Mistral Small 3: —

| Benchmark | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| Terminal-Bench | 81.8% | — |
| APEX-Agents | 52.4% | — |
| τ²-bench Banking | 39.4% | — |
| DeepResearch Bench | 35.1% | — |
| PostTrainBench | 19% | — |
| GBAEval | 45.1% | — |
| LMArena Search | 1197 | — |
| METR Time Horizons | 74.3% | — |
| Vending-Bench 2 | 6,144 | — |

## Reasoning

- GPT-5.4: 61.8 (#19)
- Mistral Small 3: 18.9 (#273)

| Benchmark | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| Chess Puzzles | 44% | 0% |
| LMArena Hard Prompts | 1485 | 1233 |
| Epoch Capabilities Index | 156.81 | 127.07 |
| ARC-AGI-2 | 74% | — |
| Kagi LLM Benchmark | 63.8% | — |
| NYT Connections (extended) | 91.3% | — |
| ARC-AGI-1 | 93.7% | — |
| CritPt | 23.4% | — |
| EnigmaEval | 16% | — |
| Thematic Generalization | 80% | — |
| EBR-Bench | 25.4% | — |
| Mystery Game Puzzles | 37% | — |
| DTBench | 94.4% | — |
| LMCA | 52% | — |
| ForecastBench | 59.5 | — |

## Math

- GPT-5.4: 73.5 (#19)
- Mistral Small 3: 16.3 (#295)

| Benchmark | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 97.8% | 6.7% |
| LMArena Math | 1488 | 1240 |
| FrontierMath (Tiers 1-3) | 78.6% | — |
| FrontierMath Tier 4 | 49% | — |
| MathArena Final-Answer Competitions | 83.1% | — |
| ProofBench | 56% | — |
| FrontierMath (Feb 2025 set) | 47.6% | — |
| FrontierMath Tier 4 (v1) | 27.1% | — |

## Knowledge

- GPT-5.4: 65.3 (#14)
- Mistral Small 3: 25.1 (#263)

| Benchmark | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| GPQA Diamond | 93.3% | 47.3% |
| LMArena Expert | 1507 | 1202 |
| Humanity's Last Exam | 36.2% | — |
| SimpleQA Verified | 45.1% | — |
| Confabulations | — | 25.2% |
| Vectara Hallucination Rate | 7% | — |

## Multimodal

- GPT-5.4: 43.7 (#20)
- Mistral Small 3: —

| Benchmark | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| LMArena Vision | 1303 | — |
| Blueprint-Bench 2 | 27.1% | — |
| Furniture Assembly | 37.5% | — |
| LMArena Document | 1471 | — |

## Multilingual

- GPT-5.4: 56.2 (#23)
- Mistral Small 3: 37.3 (#236)

| Benchmark | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| LMArena Non-English | 1465 | 1198 |
| LMArena Chinese | 1519 | 1204 |
| LMArena French | 1493 | 1203 |
| LMArena German | 1472 | 1211 |
| LMArena Japanese | 1485 | 1111 |
| LMArena Korean | 1448 | 1188 |
| LMArena Russian | 1480 | 1216 |
| LMArena Spanish | 1454 | — |

## Instruction Following

- GPT-5.4: 77.1 (#27)
- Mistral Small 3: 63.7 (#229)

| Benchmark | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| LMArena Instruction Following | 1469 | 1214 |

## Long Context

- GPT-5.4: 50.3 (#8)
- Mistral Small 3: 37.8 (#211)

| Benchmark | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| LMArena Longer Query | 1473 | 1246 |
| CL-bench | 27.9% | — |
| CL-bench Life | 21.7% | — |

## Writing & Preference

- GPT-5.4: 71.9 (#17)
- Mistral Small 3: 32.2 (#280)

| Benchmark | GPT-5.4 | Mistral Small 3 |
|---|---|---|
| LMArena Text | 1469 | 1234 |
| LMArena Creative Writing | 1439 | 1195 |
| EQ-Bench Creative Writing | 1840 | 707 |
| LMArena Multi-Turn | 1482 | 1217 |
| EQ-Bench 4 | 1272 | — |

## FAQ

### Is GPT-5.4 better than Mistral Small 3?

GPT-5.4 is the stronger model overall, scoring 59.4 to 31.2 on the Noometry Index. Mistral Small 3 costs 98× less per token, which makes it the better buy when GPT-5.4's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.4 or Mistral Small 3?

Mistral Small 3 is cheaper. It lists at $0.05 per million input tokens and $0.08 per million output tokens; GPT-5.4 lists at $2.50 and $15.

### Is GPT-5.4 or Mistral Small 3 better for coding?

GPT-5.4 scores higher on coding benchmarks: 52.6 versus 36.5 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.4 does, with 1.05M tokens against 33K.

### How many benchmarks do GPT-5.4 and Mistral Small 3 share?

21 benchmarks have published results for both models. GPT-5.4 has 68 scored results on Noometry and Mistral Small 3 has 24.