# GPT-5.3 Chat vs Laguna M.1

> GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 32.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-laguna-m-1
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where GPT-5.3 Chat leads 38.2 to 21.1.
- Laguna M.1 accepts more context: 262K tokens versus 128K.
- Laguna M.1 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.3 Chat | Laguna M.1 |
|---|---|---|
| Provider | OpenAI | Poolside |
| Noometry Index | 42.8 | 32.5 |
| Rank | 109 | 256 |
| Context | 128K | 262K |
| Input $/M | $1.75 | — |
| Output $/M | $14 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.3 Chat: 41.4 (#124)
- Laguna M.1: 36.6 (#204)

| Benchmark | GPT-5.3 Chat | Laguna M.1 |
|---|---|---|
| LMArena WebDev | — | 1349 |
| LMArena Coding | 1408 | — |

## Reasoning

- GPT-5.3 Chat: 28.5 (#102)
- Laguna M.1: 23.1 (#184)

| Benchmark | GPT-5.3 Chat | Laguna M.1 |
|---|---|---|
| LMArena Hard Prompts | 1399 | — |
| Surface Evolver Bench | — | 15.6% |

## Math

- GPT-5.3 Chat: 38.2 (#142)
- Laguna M.1: 21.1 (#283)

| Benchmark | GPT-5.3 Chat | Laguna M.1 |
|---|---|---|
| ProofBench | — | 0% |
| LMArena Math | 1389 | — |

## Knowledge

- GPT-5.3 Chat: 38.8 (#140)
- Laguna M.1: —

| Benchmark | GPT-5.3 Chat | Laguna M.1 |
|---|---|---|
| LMArena Expert | 1397 | — |

## Multilingual

- GPT-5.3 Chat: 50.3 (#124)
- Laguna M.1: —

| Benchmark | GPT-5.3 Chat | Laguna M.1 |
|---|---|---|
| LMArena Non-English | 1382 | — |
| LMArena Chinese | 1432 | — |
| LMArena French | 1397 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
| LMArena Russian | 1400 | — |
| LMArena Spanish | 1371 | — |

## Instruction Following

- GPT-5.3 Chat: 72.8 (#129)
- Laguna M.1: —

| Benchmark | GPT-5.3 Chat | Laguna M.1 |
|---|---|---|
| LMArena Instruction Following | 1378 | — |

## Long Context

- GPT-5.3 Chat: 42.6 (#120)
- Laguna M.1: —

| Benchmark | GPT-5.3 Chat | Laguna M.1 |
|---|---|---|
| LMArena Longer Query | 1396 | — |

## Writing & Preference

- GPT-5.3 Chat: 63.1 (#68)
- Laguna M.1: —

| Benchmark | GPT-5.3 Chat | Laguna M.1 |
|---|---|---|
| LMArena Text | 1389 | — |
| LMArena Creative Writing | 1355 | — |
| EQ-Bench Creative Writing | 1690 | — |
| LMArena Multi-Turn | 1412 | — |

## FAQ

### Is GPT-5.3 Chat better than Laguna M.1?

GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 32.5 on the Noometry Index.

### Is GPT-5.3 Chat or Laguna M.1 better for coding?

GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 36.6 in the Noometry coding category.

### Which has the bigger context window?

Laguna M.1 does, with 262K tokens against 128K.

### How many benchmarks do GPT-5.3 Chat and Laguna M.1 share?

0 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Laguna M.1 has 3.