Gemini 3 Pro Max vs GPT-5.2 Pro: which model should you choose?
We compared Gemini 3 Pro Max and GPT-5.2 Pro on price, context window and 12 benchmarks. GPT-5.2 Pro has the stronger average benchmark score; GPT-5.2 Pro is cheaper on a blended 3:1 basis.
Gemini 3 Pro Max
Gemini 3 Pro Max is a frontier model from Google DeepMind. It offers a 2,000,000-token context window, costs $20.57 per million input tokens and $112.92 per million output tokens, and averages 87.9 across the index's benchmark suite.
- Input
- $20.57 / 1M
- Output
- $112.92 / 1M
- Context
- 2,000,000
- Avg score
- 87.9
- Open weights
- No
GPT-5.2 Pro
GPT-5.2 Pro is a frontier model from OpenAI. It offers a 2,000,000-token context window, costs $21.32 per million input tokens and $76.33 per million output tokens, and averages 89.6 across the index's benchmark suite.
- Input
- $21.32 / 1M
- Output
- $76.33 / 1M
- Context
- 2,000,000
- Avg score
- 89.6
- Open weights
- No
Specification comparison
| Spec | Gemini 3 Pro Max | GPT-5.2 Pro | Edge |
|---|---|---|---|
| Input price / 1M | $20.57 | $21.32 | A |
| Output price / 1M | $112.92 | $76.33 | B |
| Context window | 2,000,000 | 2,000,000 | Tie |
| Max output | 128,000 | 32,768 | A |
| Average score | 87.9 | 89.6 | B |
| Arena Elo | 1477.5 | 1485.0 | B |
| Open weights | No | No | Tie |
Benchmark comparison
Gemini 3 Pro Max wins 1, GPT-5.2 Pro wins 10, and 1 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Gemini 3 Pro Max | GPT-5.2 Pro | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 89.5 | 91.6 | 2.1 | GPT-5.2 Pro |
| GPQA Diamond | 81.8 | 83.2 | 1.4 | GPT-5.2 Pro |
| SWE-bench Verified | 76.6 | 81.7 | 5.1 | GPT-5.2 Pro |
| HumanEval | 91.9 | 96.8 | 4.9 | GPT-5.2 Pro |
| MATH-500 | 92.1 | 91.8 | 0.3 | Gemini 3 Pro Max |
| AIME 2025 | 89.6 | 91.0 | 1.4 | GPT-5.2 Pro |
| LiveCodeBench | 83.6 | 84.6 | 1.0 | GPT-5.2 Pro |
| IFEval | 94.7 | 95.6 | 0.9 | GPT-5.2 Pro |
| TruthfulQA | 89.6 | 90.0 | 0.4 | GPT-5.2 Pro |
| HellaSwag | 92.6 | 95.3 | 2.7 | GPT-5.2 Pro |
| MMMU | 84.4 | 84.4 | 0.0 | Tie |
| Arena Elo | 1477.5 | 1485.0 | 7.5 | GPT-5.2 Pro |
Price analysis
On a blended 3:1 input-to-output basis, Gemini 3 Pro Max costs about $43.66 per million tokens and GPT-5.2 Pro costs about $35.07. GPT-5.2 Pro is roughly 20% cheaper than Gemini 3 Pro Max. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Both models list a 2,000,000-token context window. That is enough for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Gemini 3 Pro Max wins 1, GPT-5.2 Pro wins 10, and 1 are tied. On the index average, GPT-5.2 Pro leads Gemini 3 Pro Max by 1.7 points (89.6 versus 87.9).
The price picture favours GPT-5.2 Pro. The context picture is effectively a tie. Those two dimensions often matter more than a few benchmark points once a model is good enough for the task.
If you need a single default, start with GPT-5.2 Pro for quality-sensitive work, and check whether its price holds at your expected volume before committing.
Choose Gemini 3 Pro Max if
- You need the larger 128,000-token output limit.
Choose GPT-5.2 Pro if
- You want the higher average benchmark score in this index.
- Unit cost matters and you want the cheaper blended price.
FAQ
Is Gemini 3 Pro Max better than GPT-5.2 Pro?
On the index average, GPT-5.2 Pro leads Gemini 3 Pro Max by 1.7 points (89.6 versus 87.9). The better choice depends on price, context and your task. Gemini 3 Pro Max wins 1 benchmarks, GPT-5.2 Pro wins 10.
Which is cheaper, Gemini 3 Pro Max or GPT-5.2 Pro?
GPT-5.2 Pro is cheaper on a blended 3:1 basis at about $35.07 per million tokens, versus $43.66 for Gemini 3 Pro Max.
Which has the larger context window?
Both models list a 2,000,000-token context window.
Are these models open weights?
Gemini 3 Pro Max is proprietary; GPT-5.2 Pro is proprietary.
Which should I choose for production?
If you need a single default, start with GPT-5.2 Pro for quality-sensitive work, and check whether its price holds at your expected volume before committing.