Model comparison
Gemini 2.0 Pro vs GPT-5.1-Codex
Gemini 2.0 Pro and GPT-5.1-Codex score almost the same on the Noometry Index (39.1 vs 38.6), so choose on price, context window or the category you care about most.
Last verified . 0 shared benchmarks.
GoogleSummary
- The widest gap is in math, where Gemini 2.0 Pro leads 39.7 to 30.3.
Side by side
| Gemini 2.0 Pro | GPT-5.1-Codex | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 39.1 | 38.6 |
| Released | 2025-02-05 | 2025-11-12 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $10 |
| Results tracked | 14 | 6 |
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Category by category
Coding GPT-5.1-Codex leads
Gemini 2.0 Pro: 37.8 (#187), GPT-5.1-Codex: 41.9 (#116)
| Benchmark | Gemini 2.0 Pro | GPT-5.1-Codex |
|---|---|---|
| SWE-bench Verified (bash only) | — | 66% |
| Aider Polyglot | 35.6% | — |
| LMArena WebDev | — | 1337 |
| LiveBench Coding | 63.5% | — |
| ALE-Bench | — | 1,245 |
Agentic & Tool Use Not comparable
Gemini 2.0 Pro: —, GPT-5.1-Codex: 38.0 (#33)
| Benchmark | Gemini 2.0 Pro | GPT-5.1-Codex |
|---|---|---|
| Terminal-Bench | — | 60.4% |
| METR Time Horizons | — | 70.8% |
Reasoning Not comparable
Gemini 2.0 Pro: 22.3 (#198), GPT-5.1-Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.1-Codex |
|---|---|---|
| EnigmaEval | 0.7% | — |
| LiveBench Reasoning | 60.1% | — |
| LiveBench Data Analysis | 68% | — |
| Epoch Capabilities Index | 135.06 | — |
| LiveBench | 65.1% | — |
Math Gemini 2.0 Pro leads
Gemini 2.0 Pro: 39.7 (#100), GPT-5.1-Codex: 30.3 (#235)
| Benchmark | Gemini 2.0 Pro | GPT-5.1-Codex |
|---|---|---|
| ProofBench | — | 9% |
| LiveBench Math | 71% | — |
| MATH Level 5 | 83.5% | — |
Knowledge Not comparable
Gemini 2.0 Pro: 36.5 (#167), GPT-5.1-Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.1-Codex |
|---|---|---|
| GPQA Diamond | 65.7% | — |
| Confabulations | 18.4% | — |
Instruction Following Not comparable
Gemini 2.0 Pro: 75.5 (#59), GPT-5.1-Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.1-Codex |
|---|---|---|
| LiveBench Instruction Following | 83.4% | — |
Long Context Not comparable
Gemini 2.0 Pro: 29.2 (#292), GPT-5.1-Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.1-Codex |
|---|---|---|
| Fiction.LiveBench | 41.7% | — |
Writing & Preference Not comparable
Gemini 2.0 Pro: 52.7 (#165), GPT-5.1-Codex: —
| Benchmark | Gemini 2.0 Pro | GPT-5.1-Codex |
|---|---|---|
| LiveBench Language | 44.9% | — |
Frequently asked questions
Is Gemini 2.0 Pro better than GPT-5.1-Codex?
Gemini 2.0 Pro and GPT-5.1-Codex score almost the same on the Noometry Index (39.1 vs 38.6), so choose on price, context window or the category you care about most.
Is Gemini 2.0 Pro or GPT-5.1-Codex better for coding?
GPT-5.1-Codex scores higher on coding benchmarks: 41.9 versus 37.8 in the Noometry coding category.
How many benchmarks do Gemini 2.0 Pro and GPT-5.1-Codex share?
0 benchmarks have published results for both models. Gemini 2.0 Pro has 14 scored results on Noometry and GPT-5.1-Codex has 6.