# GPT-5.2 Codex vs GPT-6.1 Sol

> GPT-5.2 Codex has enough public results to be ranked (#107); GPT-6.1 Sol does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/gpt-5-2-codex-vs-gpt-6-1-sol
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in agentic & tool use, where GPT-5.2 Codex leads 40.7 to 34.3.
- GPT-6.1 Sol is cheaper at $2 / $10 per million input/output tokens, against $1.75 / $14 for GPT-5.2 Codex.
- GPT-6.1 Sol accepts more context: 1.05M tokens versus 400K.

## Snapshot

| | GPT-5.2 Codex | GPT-6.1 Sol |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 42.2 | 42.1 |
| Rank | 107 | — |
| Context | 400K | 1.05M |
| Input $/M | $1.75 | $2 |
| Output $/M | $14 | $10 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.2 Codex: 45.4 (#66)
- GPT-6.1 Sol: 51.4

| Benchmark | GPT-5.2 Codex | GPT-6.1 Sol |
|---|---|---|
| DeepSWE | — | 75.2% |
| SWE-bench Verified (bash only) | 72.8% | — |
| LMArena WebDev | 1339 | — |
| SWE-bench Multilingual | 66.3% | — |
| ALE-Bench | 1,300 | — |

## Agentic & Tool Use

- GPT-5.2 Codex: 40.7 (#20)
- GPT-6.1 Sol: 34.3

| Benchmark | GPT-5.2 Codex | GPT-6.1 Sol |
|---|---|---|
| Terminal-Bench | 66.5% | — |
| GDP.pdf | — | 32% |

## FAQ

### Is GPT-5.2 Codex better than GPT-6.1 Sol?

GPT-5.2 Codex has enough public results to be ranked (#107); GPT-6.1 Sol does not yet, so treat this comparison as directional.

### Which is cheaper, GPT-5.2 Codex or GPT-6.1 Sol?

GPT-6.1 Sol is cheaper. It lists at $2 per million input tokens and $10 per million output tokens; GPT-5.2 Codex lists at $1.75 and $14.

### Is GPT-5.2 Codex or GPT-6.1 Sol better for coding?

GPT-6.1 Sol scores higher on coding benchmarks: 51.4 versus 45.4 in the Noometry coding category.

### Which has the bigger context window?

GPT-6.1 Sol does, with 1.05M tokens against 400K.

### How many benchmarks do GPT-5.2 Codex and GPT-6.1 Sol share?

0 benchmarks have published results for both models. GPT-5.2 Codex has 5 scored results on Noometry and GPT-6.1 Sol has 2.