Model Comparison

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

Grok-2 mini significantly outperforms across most benchmarks.

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

GPT-4o mini (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 mini outperforms in 1 benchmarks (HumanEval), while Grok-2 mini is better at 5 benchmarks (GPQA, MATH, MathVista, MMLU, MMMU). Grok-2 mini significantly outperforms across most benchmarks.

Choose GPT-4o mini if…

  • you want predictable pricing at $0.15/M input and $0.60/M output

Choose Grok-2 mini if…

  • you want the strongest raw capability — it leads on 5 of 6 shared benchmarks
  • you want the most recent training data — it shipped Aug 2024
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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

GPT-4o mini outperforms in 1 benchmarks (HumanEval), while Grok-2 mini is better at 5 benchmarks (GPQA, MATH, MathVista, MMLU, MMMU).

Grok-2 mini significantly outperforms across most benchmarks.

Mon Jun 08 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

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

OpenAI
GPT-4o mini
Input128,000 tokens
Output16,384 tokens
xAI
Grok-2 mini
Input- tokens
Output- tokens
Mon Jun 08 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

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

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

GPT-4o mini

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 mini

Proprietary

Closed source

Grok-2 mini

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-4o mini was released on 2024-07-18, while Grok-2 mini was released on 2024-08-13.

Grok-2 mini is 1 month newer than GPT-4o mini.

GPT-4o mini

Jul 18, 2024

1.9 years ago

Grok-2 mini

Aug 13, 2024

1.8 years ago

3w newer

Knowledge Cutoff

When training data ends

GPT-4o mini has a documented knowledge cutoff of 2023-10-01, while Grok-2 mini's cutoff date is not specified.

We can confirm GPT-4o mini's training data extends to 2023-10-01, but cannot make a direct comparison without Grok-2 mini's cutoff date.

GPT-4o mini

Oct 2023

Grok-2 mini

—

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (128,000 tokens)
Higher HumanEval score (87.2% vs 85.7%)
xAI
Higher GPQA score (51.0% vs 40.2%)
Higher MATH score (73.0% vs 70.2%)
Higher MathVista score (68.1% vs 56.7%)
Higher MMLU score (86.2% vs 82.0%)
Higher MMMU score (63.2% vs 59.4%)

Detailed Comparison

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

FAQ

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

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

Grok-2 mini significantly outperforms across most benchmarks. GPT-4o mini 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 mini compare to Grok-2 mini in benchmarks?

GPT-4o mini scores HumanEval: 87.2%, MGSM: 87.0%, MMLU: 82.0%, DROP: 79.7%, MATH: 70.2%. 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 mini and Grok-2 mini?

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

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

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