# Composer 2.5 vs GPT-5.2-Codex

> Side-by-side benchmark comparison for Composer 2.5 and GPT-5.2-Codex across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/composer-2-5-vs-gpt-5-2-codex
- Last updated: October 2, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Composer 2.5 and GPT-5.2-Codex 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.
- Composer 2.5 has the lower published output-token price.
- GPT-5.2-Codex has the larger published context window at 400K.

## Model Snapshot

| Property | Composer 2.5 | GPT-5.2-Codex |
|----------|----------|----------|
| Creator | Cursor | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 400K |
| Independent public score (not head-to-head) | null | 56.76 |
| Benchmarks Covered | 8 | 5 |
| Pricing (input/output) | $0.50 / $2.50 | $1.75 / $14.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Composer 2.5 public-lane score: Coming soon
- GPT-5.2-Codex public-lane score: 40.3 (Estimated · #57/119)

| Benchmark | Composer 2.5 | GPT-5.2-Codex | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 69.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 58.4% | Coming soon | Coming soon |
| Gert Labs | Coming soon | 51.79% | Coming soon |
| JobBench | Coming soon | 26.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Composer 2.5 public-lane score: Coming soon
- GPT-5.2-Codex public-lane score: 46.5 (Supported · #49/144)

| Benchmark | Composer 2.5 | GPT-5.2-Codex | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 69.3% | Coming soon | Coming soon |
| SWE Multilingual | 79.8% | Coming soon | Coming soon |
| cursorBench31 | 63.2% | Coming soon | Coming soon |
| CursorBench 3.2 | 56.1% | Coming soon | Coming soon |
| SWE-bench (Vals) | 79.6% | 72.4% | Composer 2.5 |
| CursorBench 4.0 | 27.7% | Coming soon | Coming soon |
| Vibe Code Bench | Coming soon | 37.91% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 88.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Composer 2.5 public-lane score: Coming soon
- GPT-5.2-Codex public-lane score: 78.9 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Composer 2.5 public-lane score: Coming soon
- GPT-5.2-Codex public-lane score: 73.5 (Unranked · 1 rankable row)

### Knowledge

- Winner: Insufficient shared evidence
- Composer 2.5 public-lane score: Coming soon
- GPT-5.2-Codex public-lane score: 55.5 (Estimated · #49/171)

### Instruction Following

- Winner: Insufficient shared evidence
- Composer 2.5 public-lane score: Coming soon
- GPT-5.2-Codex public-lane score: 92.4 (#3/125)

## FAQ

### Is there enough evidence to pick between Composer 2.5 and GPT-5.2-Codex?

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 2.5 vs Composer 2](/compare/composer-2-vs-composer-2-5)
- [GPT-5.2-Codex vs Composer 2](/compare/composer-2-vs-gpt-5-2-codex)
- [Composer 2.5 vs Composer 2 Fast](/compare/composer-2-5-vs-composer-2-fast)
- [GPT-5.2-Codex vs Composer 2 Fast](/compare/composer-2-fast-vs-gpt-5-2-codex)

## Explore More

- [Composer 2.5 profile](/models/composer-2-5)
- [GPT-5.2-Codex profile](/models/gpt-5-2-codex)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)