# Gemini 1.0 Pro vs GPT-5.1-Codex

> GPT-5.1-Codex is the stronger model overall, scoring 38.2 to 27.1 on the Noometry Index.

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

## Summary

- The widest gap is in math, where GPT-5.1-Codex leads 29.3 to 8.7.

## Snapshot

| | Gemini 1.0 Pro | GPT-5.1-Codex |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 27.1 | 38.2 |
| Rank | 327 | 178 |
| Context | — | 400K |
| Input $/M | — | $1.25 |
| Output $/M | — | $10 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 1.0 Pro: 31.6 (#270)
- GPT-5.1-Codex: 41.7 (#107)

| Benchmark | Gemini 1.0 Pro | GPT-5.1-Codex |
|---|---|---|
| SWE-bench Verified (bash only) | — | 66% |
| LMArena WebDev | — | 1337 |
| LMArena Coding | 1108 | — |
| ALE-Bench | — | 1,245 |
| HumanEval+ | 55.5% | — |
| MBPP+ | 61.4% | — |

## Agentic & Tool Use

- Gemini 1.0 Pro: —
- GPT-5.1-Codex: 37.8 (#32)

| Benchmark | Gemini 1.0 Pro | GPT-5.1-Codex |
|---|---|---|
| Terminal-Bench | — | 60.4% |
| METR Time Horizons | — | 70.8% |

## Reasoning

- Gemini 1.0 Pro: 16.4 (#292)
- GPT-5.1-Codex: —

| Benchmark | Gemini 1.0 Pro | GPT-5.1-Codex |
|---|---|---|
| LMArena Hard Prompts | 1109 | — |
| DTBench | 45.9% | — |
| Epoch Capabilities Index | 116.97 | — |

## Math

- Gemini 1.0 Pro: 8.7 (#315)
- GPT-5.1-Codex: 29.3 (#218)

| Benchmark | Gemini 1.0 Pro | GPT-5.1-Codex |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.1% | — |
| ProofBench | — | 9% |
| LMArena Math | 1132 | — |
| MATH Level 5 | 11.2% | — |

## Knowledge

- Gemini 1.0 Pro: 15.5 (#286)
- GPT-5.1-Codex: —

| Benchmark | Gemini 1.0 Pro | GPT-5.1-Codex |
|---|---|---|
| GPQA Diamond | 34% | — |
| LMArena Expert | 1059 | — |
| MMLU | 70% | — |

## Multilingual

- Gemini 1.0 Pro: 33.5 (#247)
- GPT-5.1-Codex: —

| Benchmark | Gemini 1.0 Pro | GPT-5.1-Codex |
|---|---|---|
| LMArena Non-English | 1138 | — |
| LMArena Chinese | 1124 | — |
| LMArena French | 1144 | — |
| LMArena German | 1125 | — |
| LMArena Japanese | 1023 | — |
| LMArena Russian | 1186 | — |
| LMArena Spanish | 1118 | — |

## Instruction Following

- Gemini 1.0 Pro: 57.9 (#262)
- GPT-5.1-Codex: —

| Benchmark | Gemini 1.0 Pro | GPT-5.1-Codex |
|---|---|---|
| LMArena Instruction Following | 1114 | — |

## Long Context

- Gemini 1.0 Pro: 34.3 (#244)
- GPT-5.1-Codex: —

| Benchmark | Gemini 1.0 Pro | GPT-5.1-Codex |
|---|---|---|
| LMArena Longer Query | 1132 | — |

## Writing & Preference

- Gemini 1.0 Pro: 36.2 (#259)
- GPT-5.1-Codex: —

| Benchmark | Gemini 1.0 Pro | GPT-5.1-Codex |
|---|---|---|
| LMArena Text | 1149 | — |
| LMArena Creative Writing | 1130 | — |
| LMArena Multi-Turn | 1139 | — |

## FAQ

### Is Gemini 1.0 Pro better than GPT-5.1-Codex?

GPT-5.1-Codex is the stronger model overall, scoring 38.2 to 27.1 on the Noometry Index.

### Is Gemini 1.0 Pro or GPT-5.1-Codex better for coding?

GPT-5.1-Codex scores higher on coding benchmarks: 41.7 versus 31.6 in the Noometry coding category.

### How many benchmarks do Gemini 1.0 Pro and GPT-5.1-Codex share?

0 benchmarks have published results for both models. Gemini 1.0 Pro has 24 scored results on Noometry and GPT-5.1-Codex has 6.