Gemini 1.5 Pro vs Grok-1.5 Comparison

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

Performance Benchmarks

Comparative analysis across standard metrics

8 benchmarks

Gemini 1.5 Pro outperforms in 8 benchmarks (GPQA, GSM8k, HumanEval, MATH, MathVista, MMLU, MMLU-Pro, MMMU), while Grok-1.5 is better at 0 benchmarks.

Gemini 1.5 Pro significantly outperforms across most benchmarks.

Thu Mar 19 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Cost data unavailable.

Lowest available price from all providers
Thu Mar 19 2026 • llm-stats.com
Google
Gemini 1.5 Pro
Input tokens$2.50
Output tokens$10.00
Best providerGoogle
xAI
Grok-1.5
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
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Context Window

Maximum input and output token capacity

Only Gemini 1.5 Pro specifies input context (2,097,152 tokens). Only Gemini 1.5 Pro specifies output context (8,192 tokens).

Google
Gemini 1.5 Pro
Input2,097,152 tokens
Output8,192 tokens
xAI
Grok-1.5
Input- tokens
Output- tokens
Thu Mar 19 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 1.5 Pro supports multimodal inputs, whereas Grok-1.5 does not.

Gemini 1.5 Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 1.5 Pro

Text
Images
Audio
Video

Grok-1.5

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 1.5 Pro

Proprietary

Closed source

Grok-1.5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 1.5 Pro was released on 2024-05-01, while Grok-1.5 was released on 2024-03-28.

Gemini 1.5 Pro is 1 month newer than Grok-1.5.

Gemini 1.5 Pro

May 1, 2024

1.9 years ago

1mo newer
Grok-1.5

Mar 28, 2024

2.0 years ago

Knowledge Cutoff

When training data ends

Gemini 1.5 Pro has a documented knowledge cutoff of 2023-11-01, while Grok-1.5's cutoff date is not specified.

We can confirm Gemini 1.5 Pro's training data extends to 2023-11-01, but cannot make a direct comparison without Grok-1.5's cutoff date.

Gemini 1.5 Pro

Nov 2023

Grok-1.5

Outputs Comparison

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Key Takeaways

Larger context window (2,097,152 tokens)
Supports multimodal inputs
Higher GPQA score (59.1% vs 35.9%)
Higher GSM8k score (90.8% vs 90.0%)
Higher HumanEval score (84.1% vs 74.1%)
Higher MATH score (86.5% vs 50.6%)
Higher MathVista score (68.1% vs 52.8%)
Higher MMLU score (85.9% vs 81.3%)
Higher MMLU-Pro score (75.8% vs 51.0%)
Higher MMMU score (65.9% vs 53.6%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 1.5 Pro
xAI
Grok-1.5