Model Comparison

GPT-4o vs Grok-2 miniWhich is better in 2026?

Both models are evenly matched across the benchmarks.

Verdict: GPT-4o vs Grok-2 mini — which is better?

GPT-4o (by OpenAI) and Grok-2 mini (by xAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

GPT-4o outperforms in 3 benchmarks (GPQA, MMLU-Pro, MMMU), while Grok-2 mini is better at 3 benchmarks (DocVQA, MathVista, MMLU). Both models are evenly matched across the benchmarks.

Choose GPT-4o if…

  • you want predictable pricing at $2.50/M input and $10.00/M output

Choose Grok-2 mini if…

  • you want the most recent training data — it shipped Aug 2024
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

GPT-4o outperforms in 3 benchmarks (GPQA, MMLU-Pro, MMMU), while Grok-2 mini is better at 3 benchmarks (DocVQA, MathVista, MMLU).

Both models are evenly matched across the benchmarks.

Sun Jun 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GPT-4o specifies input context (128,000 tokens). Only GPT-4o specifies output context (16,384 tokens).

OpenAI
GPT-4o
Input128,000 tokens
Output16,384 tokens
xAI
Grok-2 mini
Input- tokens
Output- tokens
Sun Jun 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-4o and Grok-2 mini support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

GPT-4o

Text
Images
Audio
Video

Grok-2 mini

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-4o

Proprietary

Closed source

Grok-2 mini

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-4o was released on 2024-08-06, while Grok-2 mini was released on 2024-08-13.

Grok-2 mini is 0 month newer than GPT-4o.

GPT-4o

Aug 6, 2024

1.8 years ago

Grok-2 mini

Aug 13, 2024

1.8 years ago

1w newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (128,000 tokens)
Higher GPQA score (70.1% vs 51.0%)
Higher MMLU-Pro score (74.7% vs 72.0%)
Higher MMMU score (72.2% vs 63.2%)
xAI
Higher DocVQA score (93.2% vs 92.8%)
Higher MathVista score (68.1% vs 61.4%)
Higher MMLU score (86.2% vs 85.7%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4o
xAI
Grok-2 mini

FAQ

Common questions about GPT-4o vs Grok-2 mini.

Which is better, GPT-4o or Grok-2 mini?

Both models are evenly matched across the benchmarks. GPT-4o is made by OpenAI and Grok-2 mini is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-4o compare to Grok-2 mini in benchmarks?

GPT-4o scores AI2D: 94.2%, DocVQA: 92.8%, ChartQA: 85.7%, MMLU: 85.7%, CharXiv-D: 85.3%. Grok-2 mini scores DocVQA: 93.2%, MMLU: 86.2%, HumanEval: 85.7%, MATH: 73.0%, MMLU-Pro: 72.0%.

What are the context window sizes for GPT-4o and Grok-2 mini?

GPT-4o supports 128K tokens and Grok-2 mini supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes GPT-4o and Grok-2 mini?

GPT-4o is developed by OpenAI and Grok-2 mini is developed by xAI.

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