Model Comparison

Gemini 3.1 Pro vs Grok-1.5VWhich is better in 2026?

Comparing Gemini 3.1 Pro and Grok-1.5V across benchmarks, pricing, and capabilities.

Verdict: Gemini 3.1 Pro vs Grok-1.5V — which is better?

Gemini 3.1 Pro (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.

Choose Gemini 3.1 Pro if…

  • you want the most recent training data — it shipped Feb 2026

Choose Grok-1.5V if…

  • you are already invested in the xAI ecosystem

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Gemini 3.1 Pro and Grok-1.5Vdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Gemini 3.1 Pro specifies input context (1,048,576 tokens). Only Gemini 3.1 Pro specifies output context (65,536 tokens).

Google
Gemini 3.1 Pro
Input1,048,576 tokens
Output65,536 tokens
xAI
Grok-1.5V
Input- tokens
Output- tokens
Wed Jul 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.1 Pro and Grok-1.5V support multimodal inputs.

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

Gemini 3.1 Pro

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 3.1 Pro

Proprietary

Closed source

Grok-1.5V

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.1 Pro was released on 2026-02-19, while Grok-1.5V was released on 2024-04-12.

Gemini 3.1 Pro is 23 months newer than Grok-1.5V.

Gemini 3.1 Pro

Feb 19, 2026

4 months ago

1.9yr newer
Grok-1.5V

Apr 12, 2024

2.3 years ago

Knowledge Cutoff

When training data ends

Gemini 3.1 Pro has a documented knowledge cutoff of 2025-01-31, while Grok-1.5V's cutoff date is not specified.

We can confirm Gemini 3.1 Pro's training data extends to 2025-01-31, but cannot make a direct comparison without Grok-1.5V's cutoff date.

Gemini 3.1 Pro

Jan 2025

Grok-1.5V

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Larger context window (1,048,576 tokens)
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 3.1 Pro and Grok-1.5V side-by-side, then vote on the output you prefer.

Gemini 3.1 Pro
✓ Preferred
Grok-1.5V
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 3.1 Pro
xAI
Grok-1.5V

FAQ

Common questions about Gemini 3.1 Pro vs Grok-1.5V.

Which is better, Gemini 3.1 Pro or Grok-1.5V?

Gemini 3.1 Pro (Google) and Grok-1.5V (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Gemini 3.1 Pro compare to Grok-1.5V in benchmarks?

Gemini 3.1 Pro scores t2-bench: 99.3%, LiveCodeBench Pro: 96.2%, GPQA: 94.3%, MMMLU: 92.6%, BrowseComp: 85.9%. 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 3.1 Pro and Grok-1.5V?

Gemini 3.1 Pro 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 3.1 Pro and Grok-1.5V?

Gemini 3.1 Pro is developed by Google and Grok-1.5V is developed by xAI.

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