# Claude Opus 5 vs GPT-5.4 mini

> Claude Opus 5 is the stronger model overall, scoring 67.8 to 45.0 on the Noometry Index. GPT-5.4 mini costs 5.9× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/claude-opus-5-vs-gpt-5-4-mini
- Last updated: 2026-10-10
- Shared benchmarks: 39

## Summary

- They share 39 benchmarks with published results for both. Claude Opus 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 reasoning, where Claude Opus 5 leads 77.2 to 30.4.
- The biggest single-benchmark swing is ProofBench: 99% for Claude Opus 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 $5 / $25 for Claude Opus 5.
- Claude Opus 5 accepts more context: 1M tokens versus 400K.

## Snapshot

| | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 67.8 | 45.0 |
| Rank | 4 | 76 |
| Context | 1M | 400K |
| Input $/M | $5 | $0.75 |
| Output $/M | $25 | $4.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 5: 67.5 (#5)
- GPT-5.4 mini: 45.2 (#72)

| Benchmark | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| FrontierCode | 53.4% | 27% |
| LMArena WebDev | 1691 | 1397 |
| SciCode | 56.4% | 49.9% |
| WeirdML | 91.8% | 60.3% |
| LMArena Coding | 1534 | 1438 |
| ALE-Bench | 2,165 | 1,189 |
| DeepSWE | 73.6% | — |
| CursorBench | 46.6% | — |
| FrontierSWE | 52% | — |

## Agentic & Tool Use

- Claude Opus 5: 55.6 (#1)
- GPT-5.4 mini: 29.9 (#81)

| Benchmark | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| APEX-Agents | 65.8% | — |
| OSWorld 2.0 | 31.4% | — |
| τ²-bench Banking | 48.7% | — |
| DeepResearch Bench | — | 36.3% |
| PostTrainBench | 35% | — |
| BALROG | 63.4% | — |
| GBAEval | 79.6% | — |
| GDP.pdf | 24% | — |
| Vending-Bench 2 | 11,182 | — |

## Reasoning

- Claude Opus 5: 77.2 (#4)
- GPT-5.4 mini: 30.4 (#85)

| Benchmark | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| ARC-AGI-2 | 90.4% | 18.9% |
| NYT Connections (extended) | 94.3% | 61.8% |
| ARC-AGI-1 | 97.5% | 63.7% |
| CritPt | 29.1% | 10% |
| Chess Puzzles | 42% | 24% |
| LMArena Hard Prompts | 1526 | 1424 |
| Mystery Game Puzzles | 59% | 11% |
| DTBench | 97.9% | 80% |
| LMCA | 64.5% | 40.8% |
| Epoch Capabilities Index | 162.78 | 148.84 |
| SimpleBench | 80.6% | — |
| Kagi LLM Benchmark | — | 37.9% |
| Thematic Generalization | — | 61.7% |
| EBR-Bench | 45.7% | — |
| Bench to the Future 3 | 0.12 | — |
| ForecastBench | — | 57 |

## Math

- Claude Opus 5: 86.2 (#8)
- GPT-5.4 mini: 45.5 (#75)

| Benchmark | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | 85.6% | 51.2% |
| FrontierMath Tier 4 | 73.2% | 9.8% |
| OTIS Mock AIME 2024-2025 | 98.9% | 88.9% |
| ProofBench | 99% | 21% |
| LMArena Math | 1531 | 1419 |
| FrontierMath (Feb 2025 set) | — | 28.3% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- Claude Opus 5: 66.8 (#9)
- GPT-5.4 mini: 51.5 (#67)

| Benchmark | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| GPQA Diamond | 93.9% | 86.9% |
| SimpleQA Verified | 59.9% | 29.4% |
| LMArena Expert | 1557 | 1435 |
| Vectara Hallucination Rate | — | 5.5% |

## Multimodal

- Claude Opus 5: 50.8 (#8)
- GPT-5.4 mini: 39.7 (#56)

| Benchmark | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| LMArena Vision | 1319 | 1245 |
| Blueprint-Bench 2 | 30.4% | — |
| Furniture Assembly | 60.8% | — |
| LMArena Document | 1516 | — |

## Multilingual

- Claude Opus 5: 58.8 (#4)
- GPT-5.4 mini: 51.9 (#96)

| Benchmark | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| LMArena Non-English | 1501 | 1405 |
| LMArena Chinese | 1574 | 1446 |
| LMArena French | 1519 | 1440 |
| LMArena German | 1524 | 1409 |
| LMArena Japanese | 1516 | 1374 |
| LMArena Korean | 1521 | 1368 |
| LMArena Russian | 1507 | 1417 |
| LMArena Spanish | 1519 | 1405 |

## Instruction Following

- Claude Opus 5: 79.2 (#7)
- GPT-5.4 mini: 74.1 (#102)

| Benchmark | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| LMArena Instruction Following | 1517 | 1405 |

## Long Context

- Claude Opus 5: 46.5 (#21)
- GPT-5.4 mini: 43.0 (#112)

| Benchmark | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| LMArena Longer Query | 1515 | 1407 |

## Writing & Preference

- Claude Opus 5: 79.2 (#1)
- GPT-5.4 mini: 64.0 (#58)

| Benchmark | Claude Opus 5 | GPT-5.4 mini |
|---|---|---|
| LMArena Text | 1507 | 1412 |
| LMArena Creative Writing | 1491 | 1370 |
| EQ-Bench Creative Writing | 2133 | 1665 |
| LMArena Multi-Turn | 1499 | 1429 |
| EQ-Bench 4 | 1385 | — |

## FAQ

### Is Claude Opus 5 better than GPT-5.4 mini?

Claude Opus 5 is the stronger model overall, scoring 67.8 to 45.0 on the Noometry Index. GPT-5.4 mini costs 5.9× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.

### Which is cheaper, Claude Opus 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 Opus 5 lists at $5 and $25.

### Is Claude Opus 5 or GPT-5.4 mini better for coding?

Claude Opus 5 scores higher on coding benchmarks: 67.5 versus 45.2 in the Noometry coding category.

### Which has the bigger context window?

Claude Opus 5 does, with 1M tokens against 400K.

### How many benchmarks do Claude Opus 5 and GPT-5.4 mini share?

39 benchmarks have published results for both models. Claude Opus 5 has 57 scored results on Noometry and GPT-5.4 mini has 46.