# GPT-5.4 vs GPT-5.5

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

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

- Shared sourced benchmarks: 25
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

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

## Summary

- GPT-5.5 leads overall 73.27 to 70.96.
- The clearest category separation is in coding, where the averages are 54 for GPT-5.4 and 67.7 for GPT-5.5.
- The biggest single benchmark swing is ARC-AGI-2 in Reasoning, with scores of 74.0% and 85%.
- 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 |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Overall Score | 70.96 | 73.27 |
| Benchmarks Covered | 37 | 38 |
| Pricing (input/output) | $2.50 / $15.00 | $5.00 / $30.00 |

## Category Breakdown

### Agentic

- Winner: GPT-5.5
- GPT-5.4 public-lane score: 56.4 (Supported · #35/151)
- GPT-5.5 public-lane score: 63.9 (Supported · #15/151)

| Benchmark | GPT-5.4 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 75.1% | 82% | GPT-5.5 |
| CyberGym | 79.0% | 81.8% | GPT-5.5 |
| BrowseComp | 82.7% | 84.4% | GPT-5.5 |
| OSWorld-Verified | 75% | 78.7% | GPT-5.5 |
| MCP Atlas | 70.6% | 75.3% | GPT-5.5 |
| Toolathlon | 54.6% | 55.6% | GPT-5.5 |
| τ²-bench results | 98.9% | 98% | GPT-5.4 |
| Claw-Eval | 60.3% | Coming soon | Coming soon |
| DeepSearchQA | 73.6% | Coming soon | Coming soon |
| Gert Labs | 64.89% | 72.93% | GPT-5.5 |
| ResearchClawBench | 15.3% | 17.0% | GPT-5.5 |
| JobBench | 38.9% | 42.7% | GPT-5.5 |
| ExploitGym | 6.0% | 13.4% | GPT-5.5 |
| OSWorld 2.0 | Coming soon | 13.0% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 76.4% | Coming soon |

### Coding

- Winner: GPT-5.5
- GPT-5.4 public-lane score: 54 (Supported · #49/183)
- GPT-5.5 public-lane score: 67.7 (Supported · #8/183)

| Benchmark | GPT-5.4 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 87.5% | Coming soon | Coming soon |
| SWE-bench Pro | 57.7% | 58.6% | GPT-5.5 |
| React Native Evals | 85.3% | 84.7% | GPT-5.4 |
| Vibe Code Bench | 67.42% | 69.85% | GPT-5.5 |
| Terminal-Bench 2.0 | Coming soon | 82.0% | Coming soon |
| cursorBench31 | Coming soon | 59.2% | Coming soon |
| cursorBench32 | Coming soon | 58.4% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 43.0% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.3% | Coming soon |
| SWE-bench (Vals) | Coming soon | 82.6% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- GPT-5.4 public-lane score: 69.3 (#20/48)
- GPT-5.5 public-lane score: 71.3 (#19/48)

| Benchmark | GPT-5.4 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 81.2% | 81.2% | Tie |
| OfficeQA Pro | 53.2% | 54.1% | GPT-5.5 |
| MMMU-Pro w/ Python | 82.1% | 83.2% | GPT-5.5 |
| 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: GPT-5.5
- GPT-5.4 public-lane score: 57 (#19/22)
- GPT-5.5 public-lane score: 63.5 (#15/22)

| Benchmark | GPT-5.4 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 74.0% | 85% | GPT-5.5 |
| ARC-AGI-3 | 0.2% | 0.4% | GPT-5.5 |
| MRCR v2 64K-128K | Coming soon | 83.1% | Coming soon |
| MRCR v2 128K-256K | Coming soon | 87.5% | Coming soon |

### Knowledge

- Winner: GPT-5.5
- GPT-5.4 public-lane score: 69.2 (Supported · #16/181)
- GPT-5.5 public-lane score: 73.3 (Supported · #7/181)

| Benchmark | GPT-5.4 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.8% | 93.6% | GPT-5.5 |
| HLE | 52.1% | 52.2% | GPT-5.5 |
| HLE w/o tools | 39.8% | 41.4% | GPT-5.5 |
| GPQA-D | 92.8% | 93.6% | GPT-5.5 |
| HealthBench Hard | 40.1% | Coming soon | Coming soon |
| MedXpertQA (Text) | 59.6% | Coming soon | Coming soon |
| HealthBench Professional | 48.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 93.2% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 88.1% | Coming soon |

### Instruction Following

- Winner: Coming soon
- GPT-5.4 public-lane score: 90.4 (#19/120)
- GPT-5.5 public-lane score: 92.9 (#7/120)

### Mathematics

- Winner: Coming soon
- GPT-5.4 public-lane score: 64.5 (Unranked · 2 rankable rows)
- GPT-5.5 public-lane score: 69.6 (Unranked · 3 rankable rows)

| Benchmark | GPT-5.4 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 47.600% | 51.700% | GPT-5.5 |
| FrontierMath v2 (Tier 4) | 27.100% | 35.400% | GPT-5.5 |
| FrontierMath (legacy) | Coming soon | 51.7% | Coming soon |

## FAQ

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

GPT-5.5 is ahead overall on BenchLM right now.

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

The widest category gap is in coding, where the averages are 54 for GPT-5.4 and 67.7 for GPT-5.5.

### 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 cover on BenchLM?

GPT-5.5 currently has 38 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 vs GPT-5.4 mini](/compare/gpt-5-4-mini-vs-gpt-5-5)
- [GPT-5.4 vs GPT-5.4 nano](/compare/gpt-5-4-vs-gpt-5-4-nano)
- [GPT-5.5 vs GPT-5.4 nano](/compare/gpt-5-4-nano-vs-gpt-5-5)

## Explore More

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