Gemini 3.1 Pro vs Grok-4 Comparison

Comparing Gemini 3.1 Pro and Grok-4 across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Gemini 3.1 Pro outperforms in 3 benchmarks (ARC-AGI v2, GPQA, Humanity's Last Exam), while Grok-4 is better at 0 benchmarks.

Gemini 3.1 Pro significantly outperforms across most benchmarks.

Tue Mar 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 3.1 Pro costs less

For input processing, Gemini 3.1 Pro ($2.50/1M tokens) is 1.2x cheaper than Grok-4 ($3.00/1M tokens).

For output processing, Gemini 3.1 Pro ($15.00/1M tokens) costs the same as Grok-4 ($15.00/1M tokens).

In conclusion, Grok-4 is more expensive than Gemini 3.1 Pro.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers

Tue Mar 17 2026 • llm-stats.com

Gemini 3.1 Pro

Input tokens$2.50

Output tokens$15.00

Best providerGoogle

Grok-4

Input tokens$3.00

Output tokens$15.00

Best providerxAI

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Context Window

Maximum input and output token capacity

Gemini 3.1 Pro accepts 1,048,576 input tokens compared to Grok-4's 256,000 tokens. Gemini 3.1 Pro can generate longer responses up to 65,536 tokens, while Grok-4 is limited to 8,000 tokens.

Gemini 3.1 Pro

Input1,048,576 tokens

Output65,536 tokens

Grok-4

Input256,000 tokens

Output8,000 tokens

Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.1 Pro and Grok-4 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-4

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-4

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.1 Pro was released on 2026-02-19, while Grok-4 was released on 2025-07-09.

Gemini 3.1 Pro is 8 months newer than Grok-4.

Gemini 3.1 Pro

Feb 19, 2026

3 weeks ago

7mo newer

Grok-4

Jul 9, 2025

8 months ago

Knowledge Cutoff

When training data ends

Gemini 3.1 Pro has a knowledge cutoff of 2025-01-31, while Grok-4 has a cutoff of 2024-12-31.

Gemini 3.1 Pro has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to Grok-4 (2024-12-31).

Gemini 3.1 Pro

Jan 2025

1 mo newer

Grok-4

Dec 2024