# GPT-5.1-Codex vs Olmo 3 32b Think

> GPT-5.1-Codex and Olmo 3 32b Think score almost the same on the Noometry Index (38.2 vs 38.1), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gpt-5-1-codex-vs-olmo-3-32b-think
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Olmo 3 32b Think leads 33.8 to 29.3.
- Olmo 3 32b Think has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.1-Codex | Olmo 3 32b Think |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 38.2 | 38.1 |
| Rank | 178 | 182 |
| Context | 400K | — |
| Input $/M | $1.25 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.1-Codex: 41.7 (#107)
- Olmo 3 32b Think: 38.0 (#169)

| Benchmark | GPT-5.1-Codex | Olmo 3 32b Think |
|---|---|---|
| SWE-bench Verified (bash only) | 66% | — |
| LMArena WebDev | 1337 | — |
| LMArena Coding | — | 1318 |
| ALE-Bench | 1,245 | — |

## Agentic & Tool Use

- GPT-5.1-Codex: 37.8 (#32)
- Olmo 3 32b Think: —

| Benchmark | GPT-5.1-Codex | Olmo 3 32b Think |
|---|---|---|
| Terminal-Bench | 60.4% | — |
| METR Time Horizons | 70.8% | — |

## Reasoning

- GPT-5.1-Codex: —
- Olmo 3 32b Think: 24.9 (#138)

| Benchmark | GPT-5.1-Codex | Olmo 3 32b Think |
|---|---|---|
| LMArena Hard Prompts | — | 1302 |

## Math

- GPT-5.1-Codex: 29.3 (#218)
- Olmo 3 32b Think: 33.8 (#165)

| Benchmark | GPT-5.1-Codex | Olmo 3 32b Think |
|---|---|---|
| ProofBench | 9% | — |
| LMArena Math | — | 1315 |

## Knowledge

- GPT-5.1-Codex: —
- Olmo 3 32b Think: 34.4 (#189)

| Benchmark | GPT-5.1-Codex | Olmo 3 32b Think |
|---|---|---|
| LMArena Expert | — | 1272 |

## Multilingual

- GPT-5.1-Codex: —
- Olmo 3 32b Think: 41.4 (#205)

| Benchmark | GPT-5.1-Codex | Olmo 3 32b Think |
|---|---|---|
| LMArena Non-English | — | 1255 |
| LMArena Chinese | — | 1300 |
| LMArena French | — | 1291 |
| LMArena German | — | 1290 |
| LMArena Russian | — | 1255 |

## Instruction Following

- GPT-5.1-Codex: —
- Olmo 3 32b Think: 67.4 (#193)

| Benchmark | GPT-5.1-Codex | Olmo 3 32b Think |
|---|---|---|
| LMArena Instruction Following | — | 1275 |

## Long Context

- GPT-5.1-Codex: —
- Olmo 3 32b Think: 39.4 (#177)

| Benchmark | GPT-5.1-Codex | Olmo 3 32b Think |
|---|---|---|
| LMArena Longer Query | — | 1296 |

## Writing & Preference

- GPT-5.1-Codex: —
- Olmo 3 32b Think: 49.2 (#188)

| Benchmark | GPT-5.1-Codex | Olmo 3 32b Think |
|---|---|---|
| LMArena Text | — | 1300 |
| LMArena Creative Writing | — | 1256 |
| LMArena Multi-Turn | — | 1289 |

## FAQ

### Is GPT-5.1-Codex better than Olmo 3 32b Think?

GPT-5.1-Codex and Olmo 3 32b Think score almost the same on the Noometry Index (38.2 vs 38.1), so choose on price, context window or the category you care about most.

### Is GPT-5.1-Codex or Olmo 3 32b Think better for coding?

GPT-5.1-Codex scores higher on coding benchmarks: 41.7 versus 38.0 in the Noometry coding category.

### How many benchmarks do GPT-5.1-Codex and Olmo 3 32b Think share?

0 benchmarks have published results for both models. GPT-5.1-Codex has 6 scored results on Noometry and Olmo 3 32b Think has 14.