Model comparison
Gemini 1.0 Pro vs GPT-5.3 Codex
GPT-5.3 Codex is the stronger model overall, scoring 45.5 to 27.1 on the Noometry Index.
Last verified . 1 shared benchmarks.
GoogleSummary
- They share 1 benchmark with published results for both. Gemini 1.0 Pro scores higher in 0 categories and GPT-5.3 Codex in 1 category; one gap is clear of the uncertainty.
- The widest gap is in coding, where GPT-5.3 Codex leads 48.5 to 31.6.
Side by side
| Gemini 1.0 Pro | GPT-5.3 Codex | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 27.1 | 45.5 |
| Released | 2023-12-13 | 2026-02-05 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 24 | 8 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GPT-5.3 Codex leads
Gemini 1.0 Pro: 31.6 (#270), GPT-5.3 Codex: 48.5 (#51)
| Benchmark | Gemini 1.0 Pro | GPT-5.3 Codex |
|---|---|---|
| SWE-bench Verified | — | 74.8% |
| LMArena WebDev | — | 1408 |
| WeirdML | — | 79.3% |
| LMArena Coding | 1108 | — |
| ALE-Bench | — | 1,655 |
| HumanEval+ | 55.5% | — |
| MBPP+ | 61.4% | — |
Agentic & Tool Use Not comparable
Gemini 1.0 Pro: —, GPT-5.3 Codex: 47.8 (#9)
| Benchmark | Gemini 1.0 Pro | GPT-5.3 Codex |
|---|---|---|
| Terminal-Bench | — | 78.4% |
| METR Time Horizons | — | 74.5% |
| Vending-Bench 2 | — | 5,940 |
Reasoning Not comparable
Gemini 1.0 Pro: 16.4 (#292), GPT-5.3 Codex: —
| Benchmark | Gemini 1.0 Pro | GPT-5.3 Codex |
|---|---|---|
| Epoch Capabilities Index | 116.97 | 156.84 |
| LMArena Hard Prompts | 1109 | — |
| DTBench | 45.9% | — |
Math Not comparable
Gemini 1.0 Pro: 8.7 (#315), GPT-5.3 Codex: —
| Benchmark | Gemini 1.0 Pro | GPT-5.3 Codex |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.1% | — |
| LMArena Math | 1132 | — |
| MATH Level 5 | 11.2% | — |
Knowledge Not comparable
Gemini 1.0 Pro: 15.5 (#286), GPT-5.3 Codex: —
| Benchmark | Gemini 1.0 Pro | GPT-5.3 Codex |
|---|---|---|
| GPQA Diamond | 34% | — |
| LMArena Expert | 1059 | — |
| MMLU | 70% | — |
Multilingual Not comparable
Gemini 1.0 Pro: 33.5 (#247), GPT-5.3 Codex: —
| Benchmark | Gemini 1.0 Pro | GPT-5.3 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 Not comparable
Gemini 1.0 Pro: 57.9 (#262), GPT-5.3 Codex: —
| Benchmark | Gemini 1.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LMArena Instruction Following | 1114 | — |
Long Context Not comparable
Gemini 1.0 Pro: 34.3 (#244), GPT-5.3 Codex: —
| Benchmark | Gemini 1.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LMArena Longer Query | 1132 | — |
Writing & Preference Not comparable
Gemini 1.0 Pro: 36.2 (#259), GPT-5.3 Codex: —
| Benchmark | Gemini 1.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LMArena Text | 1149 | — |
| LMArena Creative Writing | 1130 | — |
| LMArena Multi-Turn | 1139 | — |
Frequently asked questions
Is Gemini 1.0 Pro better than GPT-5.3 Codex?
GPT-5.3 Codex is the stronger model overall, scoring 45.5 to 27.1 on the Noometry Index.
Is Gemini 1.0 Pro or GPT-5.3 Codex better for coding?
GPT-5.3 Codex scores higher on coding benchmarks: 48.5 versus 31.6 in the Noometry coding category.
How many benchmarks do Gemini 1.0 Pro and GPT-5.3 Codex share?
1 benchmark has published results for both models. Gemini 1.0 Pro has 24 scored results on Noometry and GPT-5.3 Codex has 8.