# GPT-5.4 vs GPT-5.5 Pro

> Side-by-side benchmark comparison for GPT-5.4 and GPT-5.5 Pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-4-vs-gpt-5-5-pro
- Last updated: September 4, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick GPT-5.4 if you want the stronger benchmark profile. GPT-5.5 Pro only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.4 leads overall 70.96 to 63.07.
- The clearest category separation is in knowledge, where the averages are 69.2 for GPT-5.4 and 61.1 for GPT-5.5 Pro.
- The biggest single benchmark swing is FrontierMath v2 (Tier 4) in Mathematics, with scores of 27.100% and 39.600%.
- GPT-5.4 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-5.4 also has the larger context window at 1.05M.

## Model Snapshot

| Property | GPT-5.4 | GPT-5.5 Pro |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Overall Score | 70.96 | 63.07 |
| Benchmarks Covered | 37 | 6 |
| Pricing (input/output) | $2.50 / $15.00 | $30.00 / $180.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- GPT-5.4 public-lane score: 56.4 (Supported · #35/151)
- GPT-5.5 Pro public-lane score: 60.6 (Estimated · #24/151)

| Benchmark | GPT-5.4 | GPT-5.5 Pro | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 75.1% | Coming soon | Coming soon |
| CyberGym | 79.0% | Coming soon | Coming soon |
| BrowseComp | 82.7% | 90.1% | GPT-5.5 Pro |
| OSWorld-Verified | 75% | Coming soon | Coming soon |
| MCP Atlas | 70.6% | Coming soon | Coming soon |
| Toolathlon | 54.6% | Coming soon | Coming soon |
| τ²-bench results | 98.9% | Coming soon | Coming soon |
| Claw-Eval | 60.3% | Coming soon | Coming soon |
| DeepSearchQA | 73.6% | Coming soon | Coming soon |
| Gert Labs | 64.89% | Coming soon | Coming soon |
| ResearchClawBench | 15.3% | Coming soon | Coming soon |
| JobBench | 38.9% | Coming soon | Coming soon |
| ExploitGym | 6.0% | Coming soon | Coming soon |

### Coding

- Winner: Coming soon
- GPT-5.4 public-lane score: 54 (Supported · #49/183)
- GPT-5.5 Pro public-lane score: Coming soon

| Benchmark | GPT-5.4 | GPT-5.5 Pro | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 87.5% | Coming soon | Coming soon |
| SWE-bench Pro | 57.7% | Coming soon | Coming soon |
| React Native Evals | 85.3% | Coming soon | Coming soon |
| Vibe Code Bench | 67.42% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- GPT-5.4 public-lane score: 69.3 (#20/48)
- GPT-5.5 Pro public-lane score: Coming soon

| Benchmark | GPT-5.4 | GPT-5.5 Pro | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 81.2% | Coming soon | Coming soon |
| OfficeQA Pro | 53.2% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 82.1% | Coming soon | Coming soon |
| CharXiv | 82.8% | Coming soon | Coming soon |
| ERQA | 65.4% | Coming soon | Coming soon |
| SimpleVQA | 61.1% | Coming soon | Coming soon |
| ScreenSpot Pro | 85.4% | Coming soon | Coming soon |
| ZeroBench | 41.0% | Coming soon | Coming soon |
| MedXpertQA (MM) | 77.1% | Coming soon | Coming soon |

### Reasoning

- Winner: Coming soon
- GPT-5.4 public-lane score: 57 (#19/22)
- GPT-5.5 Pro public-lane score: Coming soon

| Benchmark | GPT-5.4 | GPT-5.5 Pro | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 74.0% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.2% | Coming soon | Coming soon |

### Knowledge

- Winner: Coming soon
- GPT-5.4 public-lane score: 69.2 (Supported · #16/181)
- GPT-5.5 Pro public-lane score: 61.1 (Estimated · #36/181)

| Benchmark | GPT-5.4 | GPT-5.5 Pro | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.8% | Coming soon | Coming soon |
| HLE | 52.1% | 57.2% | GPT-5.5 Pro |
| HLE w/o tools | 39.8% | 43.1% | GPT-5.5 Pro |
| GPQA-D | 92.8% | Coming soon | Coming soon |
| HealthBench Hard | 40.1% | Coming soon | Coming soon |
| MedXpertQA (Text) | 59.6% | Coming soon | Coming soon |
| HealthBench Professional | 48.1% | Coming soon | Coming soon |

### Instruction Following

- Winner: Coming soon
- GPT-5.4 public-lane score: 90.4 (#19/120)
- GPT-5.5 Pro public-lane score: Coming soon

### Mathematics

- Winner: Coming soon
- GPT-5.4 public-lane score: 64.5 (Unranked · 2 rankable rows)
- GPT-5.5 Pro public-lane score: 70.2 (Unranked · 3 rankable rows)

| Benchmark | GPT-5.4 | GPT-5.5 Pro | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 47.600% | 51.000% | GPT-5.5 Pro |
| FrontierMath v2 (Tier 4) | 27.100% | 39.600% | GPT-5.5 Pro |
| FrontierMath (legacy) | Coming soon | 52.4% | Coming soon |

## FAQ

### Which is better overall, GPT-5.4 or GPT-5.5 Pro?

GPT-5.4 is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.4 and GPT-5.5 Pro?

The widest category gap is in knowledge, where the averages are 69.2 for GPT-5.4 and 61.1 for GPT-5.5 Pro.

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

GPT-5.4 currently has 37 sourced benchmark scores on BenchLM.

### How many benchmarks does GPT-5.5 Pro cover on BenchLM?

GPT-5.5 Pro currently has 6 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.4 vs GPT-5.4 mini](/compare/gpt-5-4-vs-gpt-5-4-mini)
- [GPT-5.5 Pro vs GPT-5.4 mini](/compare/gpt-5-4-mini-vs-gpt-5-5-pro)
- [GPT-5.4 vs GPT-5.4 nano](/compare/gpt-5-4-vs-gpt-5-4-nano)
- [GPT-5.5 Pro vs GPT-5.4 nano](/compare/gpt-5-4-nano-vs-gpt-5-5-pro)

## Explore More

- [GPT-5.4 profile](/models/gpt-5-4)
- [GPT-5.5 Pro profile](/models/gpt-5-5-pro)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)