Model comparison
Gemini 3 Deep Think vs GPT-4.5
GPT-4.5 has enough public results to be ranked (#208); Gemini 3 Deep Think does not yet, so treat this comparison as directional.
Last verified . 2 shared benchmarks.
GoogleSummary
- They share 2 benchmarks with published results for both. Gemini 3 Deep Think scores higher in 1 category and GPT-4.5 in 0 categories; one gap is clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3 Deep Think leads 70.2 to 13.9.
- The biggest single-benchmark swing is ARC-AGI-1: 96% for Gemini 3 Deep Think and 10.3% for GPT-4.5.
Side by side
| Gemini 3 Deep Think | GPT-4.5 | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 58.3 | 37.2 |
| Released | 2026-02-12 | 2025-02-27 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 3 | 42 |
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Category by category
Coding Not comparable
Gemini 3 Deep Think: —, GPT-4.5: 42.2 (#109)
| Benchmark | Gemini 3 Deep Think | GPT-4.5 |
|---|---|---|
| Aider Polyglot | — | 44.9% |
| WeirdML | — | 39.4% |
| LiveBench Coding | — | 75.2% |
| LMArena Coding | — | 1396 |
Agentic & Tool Use Not comparable
Gemini 3 Deep Think: —, GPT-4.5: 27.9 (#97)
| Benchmark | Gemini 3 Deep Think | GPT-4.5 |
|---|---|---|
| Cybench | — | 17.5% |
Reasoning Gemini 3 Deep Think leads
Gemini 3 Deep Think: 70.2 (#14), GPT-4.5: 13.9 (#330)
| Benchmark | Gemini 3 Deep Think | GPT-4.5 |
|---|---|---|
| ARC-AGI-2 | 84.6% | 0.8% |
| ARC-AGI-1 | 96% | 10.3% |
| SimpleBench | — | 34.5% |
| CritPt | 25.7% | — |
| EnigmaEval | — | 3.2% |
| LiveBench Reasoning | — | 71.1% |
| LMArena Hard Prompts | — | 1403 |
| LiveBench Data Analysis | — | 64.3% |
| Epoch Capabilities Index | — | 136.74 |
| ForecastBench | — | 61.7 |
| LiveBench | — | 69% |
Math Not comparable
Gemini 3 Deep Think: —, GPT-4.5: 32.6 (#211)
| Benchmark | Gemini 3 Deep Think | GPT-4.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 37.8% |
| LiveBench Math | — | 69.3% |
| LMArena Math | — | 1412 |
| MATH Level 5 | — | 78.6% |
Knowledge Not comparable
Gemini 3 Deep Think: —, GPT-4.5: 32.5 (#211)
| Benchmark | Gemini 3 Deep Think | GPT-4.5 |
|---|---|---|
| GPQA Diamond | — | 68.7% |
| Humanity's Last Exam | — | 5.4% |
| Confabulations | — | 13.6% |
| LMArena Expert | — | 1394 |
Multimodal Not comparable
Gemini 3 Deep Think: —, GPT-4.5: 37.6 (#71)
| Benchmark | Gemini 3 Deep Think | GPT-4.5 |
|---|---|---|
| LMArena Vision | — | 1195 |
| VPCT | — | 45% |
Multilingual Not comparable
Gemini 3 Deep Think: —, GPT-4.5: 52.5 (#83)
| Benchmark | Gemini 3 Deep Think | GPT-4.5 |
|---|---|---|
| LMArena Non-English | — | 1413 |
| LMArena Chinese | — | 1421 |
| LMArena French | — | 1418 |
| LMArena German | — | 1457 |
| LMArena Japanese | — | 1416 |
| LMArena Korean | — | 1392 |
| LMArena Russian | — | 1419 |
Instruction Following Not comparable
Gemini 3 Deep Think: —, GPT-4.5: 72.6 (#134)
| Benchmark | Gemini 3 Deep Think | GPT-4.5 |
|---|---|---|
| LiveBench Instruction Following | — | 72.3% |
| LMArena Instruction Following | — | 1404 |
Long Context Not comparable
Gemini 3 Deep Think: —, GPT-4.5: 40.4 (#155)
| Benchmark | Gemini 3 Deep Think | GPT-4.5 |
|---|---|---|
| Fiction.LiveBench | — | 63.9% |
| LMArena Longer Query | — | 1406 |
Writing & Preference Not comparable
Gemini 3 Deep Think: —, GPT-4.5: 56.9 (#134)
| Benchmark | Gemini 3 Deep Think | GPT-4.5 |
|---|---|---|
| LMArena Text | — | 1417 |
| LMArena Creative Writing | — | 1394 |
| Short-Story Creative Writing | — | 75.6% |
| EQ-Bench Creative Writing | — | 1258 |
| LMArena Multi-Turn | — | 1444 |
| LiveBench Language | — | 61.5% |
Frequently asked questions
Is Gemini 3 Deep Think better than GPT-4.5?
GPT-4.5 has enough public results to be ranked (#208); Gemini 3 Deep Think does not yet, so treat this comparison as directional.
How many benchmarks do Gemini 3 Deep Think and GPT-4.5 share?
2 benchmarks have published results for both models. Gemini 3 Deep Think has 3 scored results on Noometry and GPT-4.5 has 42.