o4 Max vs o4 Pro: which model should you choose?
We compared o4 Max and o4 Pro on price, context window and 12 benchmarks. o4 Pro has the stronger average benchmark score; o4 Pro is cheaper on a blended 3:1 basis.
o4 Max
o4 Max is a frontier model from OpenAI. It offers a 2,000,000-token context window, costs $19.51 per million input tokens and $93.98 per million output tokens, and averages 86.2 across the index's benchmark suite.
- Input
- $19.51 / 1M
- Output
- $93.98 / 1M
- Context
- 2,000,000
- Avg score
- 86.2
- Open weights
- No
o4 Pro
o4 Pro is a frontier model from OpenAI. It offers a 1,000,000-token context window, costs $19.37 per million input tokens and $70.19 per million output tokens, and averages 87.3 across the index's benchmark suite.
- Input
- $19.37 / 1M
- Output
- $70.19 / 1M
- Context
- 1,000,000
- Avg score
- 87.3
- Open weights
- No
Specification comparison
| Spec | o4 Max | o4 Pro | Edge |
|---|---|---|---|
| Input price / 1M | $19.51 | $19.37 | B |
| Output price / 1M | $93.98 | $70.19 | B |
| Context window | 2,000,000 | 1,000,000 | A |
| Max output | 65,536 | 16,384 | A |
| Average score | 86.2 | 87.3 | B |
| Arena Elo | 1486.0 | 1471.2 | A |
| Open weights | No | No | Tie |
Benchmark comparison
o4 Max wins 5, o4 Pro wins 7, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | o4 Max | o4 Pro | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 86.3 | 87.7 | 1.4 | o4 Pro |
| GPQA Diamond | 80.1 | 82.7 | 2.6 | o4 Pro |
| SWE-bench Verified | 79.8 | 78.5 | 1.3 | o4 Max |
| HumanEval | 94.6 | 92.1 | 2.5 | o4 Max |
| MATH-500 | 90.6 | 89.8 | 0.8 | o4 Max |
| AIME 2025 | 84.8 | 89.9 | 5.1 | o4 Pro |
| LiveCodeBench | 80.6 | 81.8 | 1.2 | o4 Pro |
| IFEval | 91.1 | 90.9 | 0.2 | o4 Max |
| TruthfulQA | 87.1 | 87.9 | 0.8 | o4 Pro |
| HellaSwag | 91.7 | 94.4 | 2.7 | o4 Pro |
| MMMU | 81.9 | 84.1 | 2.2 | o4 Pro |
| Arena Elo | 1486.0 | 1471.2 | 14.8 | o4 Max |
Price analysis
On a blended 3:1 input-to-output basis, o4 Max costs about $38.13 per million tokens and o4 Pro costs about $32.08. o4 Pro is roughly 16% cheaper than o4 Max. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
o4 Max has the larger context window at 2,000,000 tokens, compared with 1,000,000 for o4 Pro. That matters for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, o4 Max wins 5, o4 Pro wins 7, and 0 are tied. On the index average, o4 Pro leads o4 Max by 1.1 points (87.3 versus 86.2).
The price picture favours o4 Pro. The context picture favours o4 Max. 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 o4 Pro for quality-sensitive work, and check whether its price holds at your expected volume before committing.
Choose o4 Max if
- You need the larger 2,000,000-token context window.
- You need the larger 65,536-token output limit.
Choose o4 Pro if
- You want the higher average benchmark score in this index.
- Unit cost matters and you want the cheaper blended price.
FAQ
Is o4 Max better than o4 Pro?
On the index average, o4 Pro leads o4 Max by 1.1 points (87.3 versus 86.2). The better choice depends on price, context and your task. o4 Max wins 5 benchmarks, o4 Pro wins 7.
Which is cheaper, o4 Max or o4 Pro?
o4 Pro is cheaper on a blended 3:1 basis at about $32.08 per million tokens, versus $38.13 for o4 Max.
Which has the larger context window?
o4 Max has the larger context window at 2,000,000 tokens. o4 Pro has 1,000,000 tokens.
Are these models open weights?
o4 Max is proprietary; o4 Pro is proprietary.
Which should I choose for production?
If you need a single default, start with o4 Pro for quality-sensitive work, and check whether its price holds at your expected volume before committing.