# GPT-5.1-Codex vs Laguna M.1

> GPT-5.1-Codex is the stronger model overall, scoring 38.2 to 31.9 on the Noometry Index.

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

## Summary

- They share 2 benchmarks with published results for both. GPT-5.1-Codex scores higher in 2 categories and Laguna M.1 in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.1-Codex leads 29.3 to 20.3.
- The biggest single-benchmark swing is ProofBench: 9% for GPT-5.1-Codex and 0% for Laguna M.1.
- GPT-5.1-Codex accepts more context: 400K tokens versus 262K.
- Laguna M.1 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.1-Codex | Laguna M.1 |
|---|---|---|
| Provider | OpenAI | Poolside |
| Noometry Index | 38.2 | 31.9 |
| Rank | 178 | 252 |
| Context | 400K | 262K |
| Input $/M | $1.25 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.1-Codex: 41.7 (#107)
- Laguna M.1: 36.4 (#195)

| Benchmark | GPT-5.1-Codex | Laguna M.1 |
|---|---|---|
| LMArena WebDev | 1337 | 1348 |
| SWE-bench Verified (bash only) | 66% | — |
| ALE-Bench | 1,245 | — |

## Agentic & Tool Use

- GPT-5.1-Codex: 37.8 (#32)
- Laguna M.1: —

| Benchmark | GPT-5.1-Codex | Laguna M.1 |
|---|---|---|
| Terminal-Bench | 60.4% | — |
| METR Time Horizons | 70.8% | — |

## Reasoning

- GPT-5.1-Codex: —
- Laguna M.1: 21.9 (#187)

| Benchmark | GPT-5.1-Codex | Laguna M.1 |
|---|---|---|
| Surface Evolver Bench | — | 15.6% |

## Math

- GPT-5.1-Codex: 29.3 (#218)
- Laguna M.1: 20.3 (#276)

| Benchmark | GPT-5.1-Codex | Laguna M.1 |
|---|---|---|
| ProofBench | 9% | 0% |

## FAQ

### Is GPT-5.1-Codex better than Laguna M.1?

GPT-5.1-Codex is the stronger model overall, scoring 38.2 to 31.9 on the Noometry Index.

### Is GPT-5.1-Codex or Laguna M.1 better for coding?

GPT-5.1-Codex scores higher on coding benchmarks: 41.7 versus 36.4 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.1-Codex does, with 400K tokens against 262K.

### How many benchmarks do GPT-5.1-Codex and Laguna M.1 share?

2 benchmarks have published results for both models. GPT-5.1-Codex has 6 scored results on Noometry and Laguna M.1 has 3.