Model Comparison

Gemini 2.5 Pro Preview 06-05 vs Grok-1.5VWhich is better in 2026?

Gemini 2.5 Pro Preview 06-05 significantly outperforms across most benchmarks.

Verdict: Gemini 2.5 Pro Preview 06-05 vs Grok-1.5V — which is better?

Gemini 2.5 Pro Preview 06-05 (by Google) 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.

Gemini 2.5 Pro Preview 06-05 outperforms in 1 benchmarks (MMMU), while Grok-1.5V is better at 0 benchmarks. Gemini 2.5 Pro Preview 06-05 significantly outperforms across most benchmarks.

Choose Gemini 2.5 Pro Preview 06-05 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Jun 2025

Choose Grok-1.5V if…

  • you are already invested in the xAI ecosystem

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini 2.5 Pro Preview 06-05 outperforms in 1 benchmarks (MMMU), while Grok-1.5V is better at 0 benchmarks.

Gemini 2.5 Pro Preview 06-05 significantly outperforms across most benchmarks.

Sat Jul 18 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Gemini 2.5 Pro Preview 06-05 specifies input context (1,048,576 tokens). Only Gemini 2.5 Pro Preview 06-05 specifies output context (65,535 tokens).

Google
Gemini 2.5 Pro Preview 06-05
Input1,048,576 tokens
Output65,535 tokens
xAI
Grok-1.5V
Input- tokens
Output- tokens
Sat Jul 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 2.5 Pro Preview 06-05 and Grok-1.5V support multimodal inputs.

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

Gemini 2.5 Pro Preview 06-05

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.

Gemini 2.5 Pro Preview 06-05

Proprietary

Closed source

Grok-1.5V

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 2.5 Pro Preview 06-05 was released on 2025-06-05, while Grok-1.5V was released on 2024-04-12.

Gemini 2.5 Pro Preview 06-05 is 14 months newer than Grok-1.5V.

Gemini 2.5 Pro Preview 06-05

Jun 5, 2025

1.1 years ago

1.1yr newer
Grok-1.5V

Apr 12, 2024

2.3 years ago

Knowledge Cutoff

When training data ends

Gemini 2.5 Pro Preview 06-05 has a documented knowledge cutoff of 2025-01-31, while Grok-1.5V's cutoff date is not specified.

We can confirm Gemini 2.5 Pro Preview 06-05's training data extends to 2025-01-31, but cannot make a direct comparison without Grok-1.5V's cutoff date.

Gemini 2.5 Pro Preview 06-05

Jan 2025

Grok-1.5V

—

Outputs Comparison

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Key Takeaways

Google
Larger context window (1,048,576 tokens)
Higher MMMU score (82.0% vs 53.6%)
xAI

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

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 2.5 Pro Preview 06-05 and Grok-1.5V side-by-side, then vote on the output you prefer.

Gemini 2.5 Pro Preview 06-05
✓ Preferred
Grok-1.5V
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 2.5 Pro Preview 06-05
xAI
Grok-1.5V

FAQ

Common questions about Gemini 2.5 Pro Preview 06-05 vs Grok-1.5V.

Which is better, Gemini 2.5 Pro Preview 06-05 or Grok-1.5V?

Gemini 2.5 Pro Preview 06-05 significantly outperforms across most benchmarks. Gemini 2.5 Pro Preview 06-05 is made by Google 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 Gemini 2.5 Pro Preview 06-05 compare to Grok-1.5V in benchmarks?

Gemini 2.5 Pro Preview 06-05 scores Global-MMLU-Lite: 89.2%, AIME 2025: 88.0%, FACTS Grounding: 87.8%, GPQA: 86.4%, VideoMMMU: 83.6%. 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 Gemini 2.5 Pro Preview 06-05 and Grok-1.5V?

Gemini 2.5 Pro Preview 06-05 supports 1.0M 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 Gemini 2.5 Pro Preview 06-05 and Grok-1.5V?

Gemini 2.5 Pro Preview 06-05 is developed by Google and Grok-1.5V is developed by xAI.

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