Grok 4 Turbo vs o4 Pro: which model should you choose?
We compared Grok 4 Turbo 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.
Grok 4 Turbo
Grok 4 Turbo is a frontier model from xAI. It offers a 1,000,000-token context window, costs $19.21 per million input tokens and $87.37 per million output tokens, and averages 86.7 across the index's benchmark suite.
- Input
- $19.21 / 1M
- Output
- $87.37 / 1M
- Context
- 1,000,000
- Avg score
- 86.7
- 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 | Grok 4 Turbo | o4 Pro | Edge |
|---|---|---|---|
| Input price / 1M | $19.21 | $19.37 | A |
| Output price / 1M | $87.37 | $70.19 | B |
| Context window | 1,000,000 | 1,000,000 | Tie |
| Max output | 65,536 | 16,384 | A |
| Average score | 86.7 | 87.3 | B |
| Arena Elo | 1466.9 | 1471.2 | B |
| Open weights | No | No | Tie |
Benchmark comparison
Grok 4 Turbo wins 6, o4 Pro wins 6, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Grok 4 Turbo | o4 Pro | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 86.1 | 87.7 | 1.6 | o4 Pro |
| GPQA Diamond | 84.5 | 82.7 | 1.8 | Grok 4 Turbo |
| SWE-bench Verified | 73.8 | 78.5 | 4.7 | o4 Pro |
| HumanEval | 92.9 | 92.1 | 0.8 | Grok 4 Turbo |
| MATH-500 | 92.1 | 89.8 | 2.3 | Grok 4 Turbo |
| AIME 2025 | 85.2 | 89.9 | 4.7 | o4 Pro |
| LiveCodeBench | 84.7 | 81.8 | 2.9 | Grok 4 Turbo |
| IFEval | 91.1 | 90.9 | 0.2 | Grok 4 Turbo |
| TruthfulQA | 88.8 | 87.9 | 0.9 | Grok 4 Turbo |
| HellaSwag | 92.5 | 94.4 | 1.9 | o4 Pro |
| MMMU | 81.7 | 84.1 | 2.4 | o4 Pro |
| Arena Elo | 1466.9 | 1471.2 | 4.3 | o4 Pro |
Price analysis
On a blended 3:1 input-to-output basis, Grok 4 Turbo costs about $36.25 per million tokens and o4 Pro costs about $32.08. o4 Pro is roughly 12% cheaper than Grok 4 Turbo. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Both models list a 1,000,000-token context window. That is enough for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Grok 4 Turbo wins 6, o4 Pro wins 6, and 0 are tied. On the index average, o4 Pro leads Grok 4 Turbo by 0.6 points (87.3 versus 86.7).
The price picture favours o4 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 o4 Pro for quality-sensitive work, and check whether its price holds at your expected volume before committing.
Choose Grok 4 Turbo if
- 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 Grok 4 Turbo better than o4 Pro?
On the index average, o4 Pro leads Grok 4 Turbo by 0.6 points (87.3 versus 86.7). The better choice depends on price, context and your task. Grok 4 Turbo wins 6 benchmarks, o4 Pro wins 6.
Which is cheaper, Grok 4 Turbo or o4 Pro?
o4 Pro is cheaper on a blended 3:1 basis at about $32.08 per million tokens, versus $36.25 for Grok 4 Turbo.
Which has the larger context window?
Both models list a 1,000,000-token context window.
Are these models open weights?
Grok 4 Turbo 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.