Model Comparison

GPT-4o mini vs Grok-1.5VWhich is better in 2026?

GPT-4o mini significantly outperforms across most benchmarks.

Verdict: GPT-4o mini vs Grok-1.5V — which is better?

GPT-4o mini (by OpenAI) and Grok-1.5V (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 2 benchmarks (MathVista, MMMU), while Grok-1.5V is better at 0 benchmarks. GPT-4o mini significantly outperforms across most benchmarks.

Choose GPT-4o mini if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you want the most recent training data — it shipped Jul 2024

Choose Grok-1.5V if…

  • you are already invested in the xAI ecosystem
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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT-4o mini outperforms in 2 benchmarks (MathVista, MMMU), while Grok-1.5V is better at 0 benchmarks.

GPT-4o mini significantly outperforms across most benchmarks.

Sat Jun 06 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-1.5V
Input- tokens
Output- tokens
Sat Jun 06 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-4o mini and Grok-1.5V 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-1.5V

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-1.5V

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-4o mini was released on 2024-07-18, while Grok-1.5V was released on 2024-04-12.

GPT-4o mini is 3 months newer than Grok-1.5V.

GPT-4o mini

Jul 18, 2024

1.9 years ago

3mo newer
Grok-1.5V

Apr 12, 2024

2.2 years ago

Knowledge Cutoff

When training data ends

GPT-4o mini has a documented knowledge cutoff of 2023-10-01, while Grok-1.5V'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-1.5V's cutoff date.

GPT-4o mini

Oct 2023

Grok-1.5V

—

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (128,000 tokens)
Higher MathVista score (56.7% vs 52.8%)
Higher MMMU score (59.4% vs 53.6%)
xAI

No standout differentiators in the data we have for this pair.

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4o mini
xAI
Grok-1.5V

FAQ

Common questions about GPT-4o mini vs Grok-1.5V.

Which is better, GPT-4o mini or Grok-1.5V?

GPT-4o mini significantly outperforms across most benchmarks. GPT-4o mini is made by OpenAI and Grok-1.5V 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-1.5V in benchmarks?

GPT-4o mini scores HumanEval: 87.2%, MGSM: 87.0%, MMLU: 82.0%, DROP: 79.7%, MATH: 70.2%. Grok-1.5V scores AI2D: 88.3%, DocVQA: 85.6%, TextVQA: 78.1%, ChartQA: 76.1%, RealWorldQA: 68.7%.

What are the context window sizes for GPT-4o mini and Grok-1.5V?

GPT-4o mini supports 128K tokens and Grok-1.5V 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-1.5V?

GPT-4o mini is developed by OpenAI and Grok-1.5V is developed by xAI.

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