# Claude Sonnet 5.5 vs GPT-5.4 mini

> Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 45.0 on the Noometry Index. GPT-5.4 mini costs 2.4× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-gpt-5-4-mini
- Last updated: 2026-10-12
- Shared benchmarks: 27

## Summary

- They share 27 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 10 categories and GPT-5.4 mini in 0 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 45.5.
- The biggest single-benchmark swing is ProofBench: 100% for Claude Sonnet 5.5 and 21% for GPT-5.4 mini.
- GPT-5.4 mini is cheaper at $0.75 / $4.50 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
- Claude Sonnet 5.5 accepts more context: 1M tokens versus 400K.

## Snapshot

| | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 61.9 | 45.0 |
| Rank | 10 | 76 |
| Context | 1M | 400K |
| Input $/M | $2 | $0.75 |
| Output $/M | $10 | $4.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Sonnet 5.5: 67.3 (#6)
- GPT-5.4 mini: 45.2 (#72)

| Benchmark | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| FrontierCode | 52.1% | 27% |
| LMArena WebDev | 1774 | 1397 |
| SciCode | 61% | 49.9% |
| LMArena Coding | 1513 | 1438 |
| ALE-Bench | 1,819 | 1,189 |
| CursorBench | 55.5% | — |
| FrontierSWE | 61.9% | — |
| WeirdML | — | 60.3% |

## Agentic & Tool Use

- Claude Sonnet 5.5: 45.0 (#16)
- GPT-5.4 mini: 29.9 (#81)

| Benchmark | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| APEX-Agents | 75.5% | — |
| DeepResearch Bench | — | 36.3% |

## Reasoning

- Claude Sonnet 5.5: 54.0 (#28)
- GPT-5.4 mini: 30.4 (#85)

| Benchmark | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| NYT Connections (extended) | 80.5% | 61.8% |
| CritPt | 31.4% | 10% |
| LMArena Hard Prompts | 1495 | 1424 |
| Mystery Game Puzzles | 65% | 11% |
| Epoch Capabilities Index | 165.03 | 148.84 |
| ARC-AGI-2 | — | 18.9% |
| Kagi LLM Benchmark | — | 37.9% |
| ARC-AGI-1 | — | 63.7% |
| Chess Puzzles | — | 24% |
| Thematic Generalization | — | 61.7% |
| DTBench | — | 80% |
| LMCA | — | 40.8% |
| ForecastBench | — | 57 |

## Math

- Claude Sonnet 5.5: 87.9 (#6)
- GPT-5.4 mini: 45.5 (#75)

| Benchmark | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | 51.2% |
| FrontierMath Tier 4 | 80.5% | 9.8% |
| OTIS Mock AIME 2024-2025 | 100% | 88.9% |
| ProofBench | 100% | 21% |
| LMArena Math | 1510 | 1419 |
| FrontierMath (Feb 2025 set) | — | 28.3% |
| FrontierMath Erdős | 2.9% | — |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#12)
- GPT-5.4 mini: 51.5 (#67)

| Benchmark | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| GPQA Diamond | 95.6% | 86.9% |
| SimpleQA Verified | 46.5% | 29.4% |
| LMArena Expert | 1540 | 1435 |
| Vectara Hallucination Rate | — | 5.5% |

## Multimodal

- Claude Sonnet 5.5: 51.5 (#6)
- GPT-5.4 mini: 39.7 (#56)

| Benchmark | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| LMArena Vision | 1289 | 1245 |
| Furniture Assembly | 75% | — |

## Multilingual

- Claude Sonnet 5.5: 55.3 (#30)
- GPT-5.4 mini: 51.9 (#96)

| Benchmark | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| LMArena Non-English | 1452 | 1405 |
| LMArena Chinese | 1522 | 1446 |
| LMArena Russian | 1451 | 1417 |
| LMArena French | — | 1440 |
| LMArena German | — | 1409 |
| LMArena Japanese | — | 1374 |
| LMArena Korean | — | 1368 |
| LMArena Spanish | — | 1405 |

## Instruction Following

- Claude Sonnet 5.5: 78.3 (#11)
- GPT-5.4 mini: 74.1 (#102)

| Benchmark | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| LMArena Instruction Following | 1495 | 1405 |

## Long Context

- Claude Sonnet 5.5: 45.9 (#28)
- GPT-5.4 mini: 43.0 (#112)

| Benchmark | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| LMArena Longer Query | 1498 | 1407 |

## Writing & Preference

- Claude Sonnet 5.5: 66.0 (#40)
- GPT-5.4 mini: 64.0 (#58)

| Benchmark | Claude Sonnet 5.5 | GPT-5.4 mini |
|---|---|---|
| LMArena Text | 1471 | 1412 |
| LMArena Creative Writing | 1465 | 1370 |
| LMArena Multi-Turn | 1474 | 1429 |
| EQ-Bench Creative Writing | — | 1665 |

## FAQ

### Is Claude Sonnet 5.5 better than GPT-5.4 mini?

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 45.0 on the Noometry Index. GPT-5.4 mini costs 2.4× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

### Which is cheaper, Claude Sonnet 5.5 or GPT-5.4 mini?

GPT-5.4 mini is cheaper. It lists at $0.75 per million input tokens and $4.50 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.

### Is Claude Sonnet 5.5 or GPT-5.4 mini better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 45.2 in the Noometry coding category.

### Which has the bigger context window?

Claude Sonnet 5.5 does, with 1M tokens against 400K.

### How many benchmarks do Claude Sonnet 5.5 and GPT-5.4 mini share?

27 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and GPT-5.4 mini has 46.