Model comparison
Gemini 3 Deep Think vs GPT-5.3 Codex
GPT-5.3 Codex has enough public results to be ranked (#69); Gemini 3 Deep Think does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
GoogleSide by side
| Gemini 3 Deep Think | GPT-5.3 Codex | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 58.3 | 45.8 |
| Released | 2026-02-12 | 2026-02-05 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 3 | 8 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Not comparable
Gemini 3 Deep Think: —, GPT-5.3 Codex: 48.6 (#56)
| Benchmark | Gemini 3 Deep Think | GPT-5.3 Codex |
|---|---|---|
| SWE-bench Verified | — | 74.8% |
| LMArena WebDev | — | 1409 |
| WeirdML | — | 79.3% |
| ALE-Bench | — | 1,655 |
Agentic & Tool Use Not comparable
Gemini 3 Deep Think: —, GPT-5.3 Codex: 48.0 (#9)
| Benchmark | Gemini 3 Deep Think | GPT-5.3 Codex |
|---|---|---|
| Terminal-Bench | — | 78.4% |
| METR Time Horizons | — | 74.5% |
| Vending-Bench 2 | — | 5,940 |
Reasoning Not comparable
Gemini 3 Deep Think: 70.2 (#14), GPT-5.3 Codex: —
| Benchmark | Gemini 3 Deep Think | GPT-5.3 Codex |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| ARC-AGI-1 | 96% | — |
| CritPt | 25.7% | — |
| Epoch Capabilities Index | — | 156.77 |
Frequently asked questions
Is Gemini 3 Deep Think better than GPT-5.3 Codex?
GPT-5.3 Codex has enough public results to be ranked (#69); Gemini 3 Deep Think does not yet, so treat this comparison as directional.
How many benchmarks do Gemini 3 Deep Think and GPT-5.3 Codex share?
0 benchmarks have published results for both models. Gemini 3 Deep Think has 3 scored results on Noometry and GPT-5.3 Codex has 8.