# Gemma 1.1 2b IT vs GPT-5.1-Codex

> GPT-5.1-Codex is the stronger model overall, scoring 38.6 to 29.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemma-1-1-2b-it-vs-gpt-5-1-codex
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where GPT-5.1-Codex leads 41.9 to 30.1.
- Gemma 1.1 2b IT has downloadable open weights; the other is API-only.

## Snapshot

| | Gemma 1.1 2b IT | GPT-5.1-Codex |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 29.3 | 38.6 |
| Rank | 313 | 186 |
| Context | — | 400K |
| Input $/M | — | $1.25 |
| Output $/M | — | $10 |
| Weights | Open | Proprietary |

## Coding

- Gemma 1.1 2b IT: 30.1 (#299)
- GPT-5.1-Codex: 41.9 (#116)

| Benchmark | Gemma 1.1 2b IT | GPT-5.1-Codex |
|---|---|---|
| SWE-bench Verified (bash only) | — | 66% |
| LMArena WebDev | — | 1337 |
| LMArena Coding | 1034 | — |
| ALE-Bench | — | 1,245 |
| HumanEval+ | 17.7% | — |
| MBPP+ | 23.3% | — |

## Agentic & Tool Use

- Gemma 1.1 2b IT: —
- GPT-5.1-Codex: 38.0 (#33)

| Benchmark | Gemma 1.1 2b IT | GPT-5.1-Codex |
|---|---|---|
| Terminal-Bench | — | 60.4% |
| METR Time Horizons | — | 70.8% |

## Reasoning

- Gemma 1.1 2b IT: 19.1 (#270)
- GPT-5.1-Codex: —

| Benchmark | Gemma 1.1 2b IT | GPT-5.1-Codex |
|---|---|---|
| LMArena Hard Prompts | 1005 | — |

## Math

- Gemma 1.1 2b IT: 30.8 (#232)
- GPT-5.1-Codex: 30.3 (#235)

| Benchmark | Gemma 1.1 2b IT | GPT-5.1-Codex |
|---|---|---|
| ProofBench | — | 9% |
| LMArena Math | 1047 | — |

## Knowledge

- Gemma 1.1 2b IT: 26.5 (#258)
- GPT-5.1-Codex: —

| Benchmark | Gemma 1.1 2b IT | GPT-5.1-Codex |
|---|---|---|
| LMArena Expert | 970 | — |

## Multilingual

- Gemma 1.1 2b IT: 24.6 (#289)
- GPT-5.1-Codex: —

| Benchmark | Gemma 1.1 2b IT | GPT-5.1-Codex |
|---|---|---|
| LMArena Non-English | 988 | — |
| LMArena Chinese | 1012 | — |
| LMArena German | 944 | — |
| LMArena Korean | 899 | — |
| LMArena Russian | 990 | — |

## Instruction Following

- Gemma 1.1 2b IT: 49.9 (#299)
- GPT-5.1-Codex: —

| Benchmark | Gemma 1.1 2b IT | GPT-5.1-Codex |
|---|---|---|
| LMArena Instruction Following | 992 | — |

## Long Context

- Gemma 1.1 2b IT: 30.6 (#286)
- GPT-5.1-Codex: —

| Benchmark | Gemma 1.1 2b IT | GPT-5.1-Codex |
|---|---|---|
| LMArena Longer Query | 1003 | — |

## Writing & Preference

- Gemma 1.1 2b IT: 25.1 (#306)
- GPT-5.1-Codex: —

| Benchmark | Gemma 1.1 2b IT | GPT-5.1-Codex |
|---|---|---|
| LMArena Text | 1022 | — |
| LMArena Creative Writing | 998 | — |
| LMArena Multi-Turn | 959 | — |

## FAQ

### Is Gemma 1.1 2b IT better than GPT-5.1-Codex?

GPT-5.1-Codex is the stronger model overall, scoring 38.6 to 29.3 on the Noometry Index.

### Is Gemma 1.1 2b IT or GPT-5.1-Codex better for coding?

GPT-5.1-Codex scores higher on coding benchmarks: 41.9 versus 30.1 in the Noometry coding category.

### How many benchmarks do Gemma 1.1 2b IT and GPT-5.1-Codex share?

0 benchmarks have published results for both models. Gemma 1.1 2b IT has 16 scored results on Noometry and GPT-5.1-Codex has 6.