# Claude Sonnet 5 vs GPT-5.4 nano

> Side-by-side benchmark comparison for Claude Sonnet 5 and GPT-5.4 nano across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-5-vs-gpt-5-4-nano
- Last updated: September 18, 2026

- Shared sourced benchmarks: 9
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Claude Sonnet 5 if you want the stronger benchmark profile. GPT-5.4 nano only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Sonnet 5 leads overall 69.68 to 59.42.
- The clearest category separation is in multimodal & grounded, where the averages are 77.4 for Claude Sonnet 5 and 23.8 for GPT-5.4 nano.
- The biggest single benchmark swing is OSWorld-Verified in Agentic, with scores of 81.2% and 39%.
- GPT-5.4 nano is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Sonnet 5 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Sonnet 5 | GPT-5.4 nano |
|----------|----------|----------|
| Creator | Anthropic | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 400K |
| Overall Score | 69.68 | 59.42 |
| Benchmarks Covered | 26 | 18 |
| Pricing (input/output) | $2.00 / $10.00 | $0.20 / $1.25 |

## Category Breakdown

### Agentic

- Winner: Claude Sonnet 5
- Claude Sonnet 5 public-lane score: 65.9 (Supported · #11/154)
- GPT-5.4 nano public-lane score: 34.5 (Supported · #137/154)

| Benchmark | Claude Sonnet 5 | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 14.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 80.4% | 46.3% | Claude Sonnet 5 |
| BrowseComp | 84.7% | Coming soon | Coming soon |
| HLE w/ tools | 57.4% | Coming soon | Coming soon |
| OSWorld-Verified | 81.2% | 39% | Claude Sonnet 5 |
| Terminal-Bench 2.1 (Vals) | 74.5% | 41.6% | Claude Sonnet 5 |
| ApprenticeBench | 16% | Coming soon | Coming soon |
| MCP Atlas | Coming soon | 56.1% | Coming soon |
| Toolathlon | Coming soon | 35.5% | Coming soon |
| τ²-bench results | Coming soon | 92.5% | Coming soon |

### Coding

- Winner: Claude Sonnet 5
- Claude Sonnet 5 public-lane score: 63.9 (Supported · #13/154)
- GPT-5.4 nano public-lane score: 37.1 (Supported · #129/154)

| Benchmark | Claude Sonnet 5 | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85.2% | Coming soon | Coming soon |
| SWE-bench Pro | 63.2% | Coming soon | Coming soon |
| SWE Multilingual | 78.3% | Coming soon | Coming soon |
| SWE Multimodal | 28.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 80.4% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 42.7% | Coming soon | Coming soon |
| cursorBench32 | 61.5% | Coming soon | Coming soon |
| VulcanBench CII v1 | 89.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.4% | 84.0% | GPT-5.4 nano |
| SWE-bench (Vals) | 79.6% | 69.8% | Claude Sonnet 5 |
| cursorBench40 | 34.1% | Coming soon | Coming soon |
| Vibe Code Bench | Coming soon | 26.10% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 77.4 (#14/48)
- GPT-5.4 nano public-lane score: 23.8 (#45/48)

| Benchmark | Claude Sonnet 5 | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 88.3% | Coming soon | Coming soon |
| CharXiv w/o tools | 77% | Coming soon | Coming soon |
| MMMU-Pro | Coming soon | 66.1% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 69.5% | Coming soon |

### Reasoning

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 77.4 (Unranked · 2 rankable rows)
- GPT-5.4 nano public-lane score: 73.7 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Claude Sonnet 5
- Claude Sonnet 5 public-lane score: 66.5 (Supported · #20/184)
- GPT-5.4 nano public-lane score: 47.5 (Supported · #98/184)

| Benchmark | Claude Sonnet 5 | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| HLE | 57.4% | 37.7% | Claude Sonnet 5 |
| HLE w/o tools | 43.2% | 24.3% | Claude Sonnet 5 |
| HLE-Verified | 31.0% | Coming soon | Coming soon |
| LABBench2 | 80.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.9% | 77.5% | Claude Sonnet 5 |
| MMLU-Pro (Vals) | 87.5% | 77.2% | Claude Sonnet 5 |
| GPQA | Coming soon | 82.8% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 91.9 (#9/124)

### Mathematics

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 43.8 (Unranked · 2 rankable rows)

| Benchmark | Claude Sonnet 5 | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 25.860% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 6.250% | Coming soon |

## FAQ

### Which is better overall, Claude Sonnet 5 or GPT-5.4 nano?

Claude Sonnet 5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Sonnet 5 and GPT-5.4 nano?

The widest category gap is in multimodal & grounded, where the averages are 77.4 for Claude Sonnet 5 and 23.8 for GPT-5.4 nano.

### How many benchmarks does Claude Sonnet 5 cover on BenchLM?

Claude Sonnet 5 currently has 26 sourced benchmark scores on BenchLM.

### How many benchmarks does GPT-5.4 nano cover on BenchLM?

GPT-5.4 nano currently has 18 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Sonnet 5 vs GPT-5.4](/compare/claude-sonnet-5-vs-gpt-5-4)
- [GPT-5.4 nano vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-nano)
- [Claude Sonnet 5 vs GPT-5.4 mini](/compare/claude-sonnet-5-vs-gpt-5-4-mini)
- [GPT-5.4 nano vs GPT-5.4 mini](/compare/gpt-5-4-mini-vs-gpt-5-4-nano)

## Explore More

- [Claude Sonnet 5 profile](/models/claude-sonnet-5)
- [GPT-5.4 nano profile](/models/gpt-5-4-nano)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)