Head-to-head · frontier vs frontier

GPT-5.2 Vision vs Grok 4 Turbo: which model should you choose?

We compared GPT-5.2 Vision and Grok 4 Turbo on price, context window and 12 benchmarks. GPT-5.2 Vision has the stronger average benchmark score; GPT-5.2 Vision is cheaper on a blended 3:1 basis.

OpenAI

GPT-5.2 Vision

GPT-5.2 Vision is a frontier model from OpenAI. It offers a 1,000,000-token context window, costs $19.03 per million input tokens and $85.72 per million output tokens, and averages 87.4 across the index's benchmark suite.

Input: $19.03 / 1M
Output: $85.72 / 1M
Context: 1,000,000
Avg score: 87.4
Open weights: No

Full GPT-5.2 Vision page

xAI

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

Full Grok 4 Turbo page

Specification comparison

Spec	GPT-5.2 Vision	Grok 4 Turbo	Edge
Input price / 1M	$19.03	$19.21	A
Output price / 1M	$85.72	$87.37	A
Context window	1,000,000	1,000,000	Tie
Max output	16,384	65,536	B
Average score	87.4	86.7	A
Arena Elo	1484.3	1466.9	A
Open weights	No	No	Tie

Benchmark comparison

GPT-5.2 Vision wins 8, Grok 4 Turbo wins 4, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.

Benchmark	GPT-5.2 Vision	Grok 4 Turbo	Gap	Winner
MMLU-Pro	89.5	86.1	3.4	GPT-5.2 Vision
GPQA Diamond	82.1	84.5	2.4	Grok 4 Turbo
SWE-bench Verified	78.8	73.8	5.0	GPT-5.2 Vision
HumanEval	91.2	92.9	1.7	Grok 4 Turbo
MATH-500	92.9	92.1	0.8	GPT-5.2 Vision
AIME 2025	85.7	85.2	0.5	GPT-5.2 Vision
LiveCodeBench	83.4	84.7	1.3	Grok 4 Turbo
IFEval	93.9	91.1	2.8	GPT-5.2 Vision
TruthfulQA	85.3	88.8	3.5	Grok 4 Turbo
HellaSwag	94.6	92.5	2.1	GPT-5.2 Vision
MMMU	84.4	81.7	2.7	GPT-5.2 Vision
Arena Elo	1484.3	1466.9	17.4	GPT-5.2 Vision

Price analysis

On a blended 3:1 input-to-output basis, GPT-5.2 Vision costs about $35.70 per million tokens and Grok 4 Turbo costs about $36.25. GPT-5.2 Vision is roughly 2% 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, GPT-5.2 Vision wins 8, Grok 4 Turbo wins 4, and 0 are tied. On the index average, GPT-5.2 Vision leads Grok 4 Turbo by 0.7 points (87.4 versus 86.7).

The price picture favours GPT-5.2 Vision. 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 Vision for quality-sensitive work, and check whether its price holds at your expected volume before committing.

Choose GPT-5.2 Vision if

You want the higher average benchmark score in this index.
Unit cost matters and you want the cheaper blended price.

Choose Grok 4 Turbo if

You need the larger 65,536-token output limit.

FAQ

Is GPT-5.2 Vision better than Grok 4 Turbo?

On the index average, GPT-5.2 Vision leads Grok 4 Turbo by 0.7 points (87.4 versus 86.7). The better choice depends on price, context and your task. GPT-5.2 Vision wins 8 benchmarks, Grok 4 Turbo wins 4.

Which is cheaper, GPT-5.2 Vision or Grok 4 Turbo?

GPT-5.2 Vision is cheaper on a blended 3:1 basis at about $35.70 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?

GPT-5.2 Vision is proprietary; Grok 4 Turbo is proprietary.

Which should I choose for production?