# Composer 2 vs GPT-5.4 nano

> Side-by-side benchmark comparison for Composer 2 and GPT-5.4 nano across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/composer-2-vs-gpt-5-4-nano
- Last updated: September 21, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Composer 2 and GPT-5.4 nano share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GPT-5.4 nano has the lower published output-token price.
- GPT-5.4 nano has the larger published context window at 400K.

## Model Snapshot

| Property | Composer 2 | GPT-5.4 nano |
|----------|----------|----------|
| Creator | Cursor | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 400K |
| Independent public score (not head-to-head) | null | 59.52 |
| Benchmarks Covered | 5 | 18 |
| Pricing (input/output) | $0.50 / $2.50 | $0.20 / $1.25 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: 49.5 (Estimated · #64/154)
- GPT-5.4 nano public-lane score: 35.5 (Supported · #137/154)

| Benchmark | Composer 2 | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 61.7% | 46.3% | Composer 2 |
| OSWorld-Verified | Coming soon | 39% | 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 |
| Terminal-Bench 2.1 (Vals) | Coming soon | 41.6% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: 49.5 (Estimated · #68/156)
- GPT-5.4 nano public-lane score: 38.1 (Supported · #130/156)

| Benchmark | Composer 2 | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| SWE Multilingual | 73.7% | Coming soon | Coming soon |
| SWE-Rebench | 58% | Coming soon | Coming soon |
| React Native Evals | 96.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 61.7% | Coming soon | Coming soon |
| Vibe Code Bench | Coming soon | 26.10% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 84.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 69.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 73.7 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 23.8 (#46/49)

| Benchmark | Composer 2 | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 66.1% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 69.5% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 48 (Supported · #96/186)

| Benchmark | Composer 2 | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 82.8% | Coming soon |
| HLE | Coming soon | 37.7% | Coming soon |
| HLE w/o tools | Coming soon | 24.3% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 77.5% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 77.2% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 91.9 (#9/124)

### Mathematics

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 43.8 (Unranked · 2 rankable rows)

| Benchmark | Composer 2 | 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

### Is there enough evidence to pick between Composer 2 and GPT-5.4 nano?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Composer 2 vs Composer 2.5](/compare/composer-2-vs-composer-2-5)
- [GPT-5.4 nano vs Composer 2.5](/compare/composer-2-5-vs-gpt-5-4-nano)
- [Composer 2 vs Composer 2 Fast](/compare/composer-2-vs-composer-2-fast)
- [GPT-5.4 nano vs Composer 2 Fast](/compare/composer-2-fast-vs-gpt-5-4-nano)

## Explore More

- [Composer 2 profile](/models/composer-2)
- [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)