Model Comparison

Grok-4 vs Gemini 2.5 Pro Preview 06-05

Grok-4 significantly outperforms across most benchmarks. Gemini 2.5 Pro Preview 06-05 is 1.7x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Grok-4 outperforms in 4 benchmarks (AIME 2025, GPQA, Humanity's Last Exam, LiveCodeBench), while Gemini 2.5 Pro Preview 06-05 is better at 0 benchmarks.

Grok-4 significantly outperforms across most benchmarks.

Sun May 10 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 2.5 Pro Preview 06-05 costs less

For input processing, Grok-4 ($3.00/1M tokens) is 2.4x more expensive than Gemini 2.5 Pro Preview 06-05 ($1.25/1M tokens).

For output processing, Grok-4 ($15.00/1M tokens) is 1.5x more expensive than Gemini 2.5 Pro Preview 06-05 ($10.00/1M tokens).

In conclusion, Grok-4 is more expensive than Gemini 2.5 Pro Preview 06-05.*

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

Lowest available price from all providers
Sun May 10 2026 • llm-stats.com
xAI
Grok-4
Input tokens$3.00
Output tokens$15.00
Best providerxAI
Google
Gemini 2.5 Pro Preview 06-05
Input tokens$1.25
Output tokens$10.00
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 2.5 Pro Preview 06-05 accepts 1,048,576 input tokens compared to Grok-4's 256,000 tokens. Gemini 2.5 Pro Preview 06-05 can generate longer responses up to 65,535 tokens, while Grok-4 is limited to 8,000 tokens.

xAI
Grok-4
Input256,000 tokens
Output8,000 tokens
Google
Gemini 2.5 Pro Preview 06-05
Input1,048,576 tokens
Output65,535 tokens
Sun May 10 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Grok-4 and Gemini 2.5 Pro Preview 06-05 support multimodal inputs.

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

Grok-4

Text
Images
Audio
Video

Gemini 2.5 Pro Preview 06-05

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.

Grok-4

Proprietary

Closed source

Gemini 2.5 Pro Preview 06-05

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-4 was released on 2025-07-09, while Gemini 2.5 Pro Preview 06-05 was released on 2025-06-05.

Grok-4 is 1 month newer than Gemini 2.5 Pro Preview 06-05.

Grok-4

Jul 9, 2025

10 months ago

1mo newer
Gemini 2.5 Pro Preview 06-05

Jun 5, 2025

11 months ago

Knowledge Cutoff

When training data ends

Grok-4 has a knowledge cutoff of 2024-12-31, while Gemini 2.5 Pro Preview 06-05 has a cutoff of 2025-01-31.

Gemini 2.5 Pro Preview 06-05 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).

Grok-4

Dec 2024

Gemini 2.5 Pro Preview 06-05

Jan 2025

1 mo newer

Provider Availability

Grok-4 is available from xAI. Gemini 2.5 Pro Preview 06-05 is available from Google.

Grok-4

xai logo
xAI
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

Gemini 2.5 Pro Preview 06-05

google logo
Google
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

xAI
Higher AIME 2025 score (91.7% vs 88.0%)
Higher GPQA score (87.5% vs 86.4%)
Higher Humanity's Last Exam score (40.0% vs 21.6%)
Higher LiveCodeBench score (79.0% vs 69.0%)
Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
xAIGrok-4
GoogleGemini 2.5 Pro Preview 06-05
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Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-4
Google
Gemini 2.5 Pro Preview 06-05

FAQ

Common questions about Grok-4 vs Gemini 2.5 Pro Preview 06-05.

Which is better, Grok-4 or Gemini 2.5 Pro Preview 06-05?

Grok-4 significantly outperforms across most benchmarks. Grok-4 is made by xAI and Gemini 2.5 Pro Preview 06-05 is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Grok-4 compare to Gemini 2.5 Pro Preview 06-05 in benchmarks?

Grok-4 scores AIME 2025: 91.7%, HMMT25: 90.0%, GPQA: 87.5%, LiveCodeBench: 79.0%, Humanity's Last Exam: 40.0%. 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%.

Is Grok-4 cheaper than Gemini 2.5 Pro Preview 06-05?

Gemini 2.5 Pro Preview 06-05 is 2.4x cheaper for input tokens. Grok-4 costs $3.00/M input and $15.00/M output via xai. Gemini 2.5 Pro Preview 06-05 costs $1.25/M input and $10.00/M output via google.

What are the context window sizes for Grok-4 and Gemini 2.5 Pro Preview 06-05?

Grok-4 supports 256K tokens and Gemini 2.5 Pro Preview 06-05 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Grok-4 and Gemini 2.5 Pro Preview 06-05?

Key differences include context window (256K vs 1.0M), input pricing ($3.00 vs $1.25/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok-4 and Gemini 2.5 Pro Preview 06-05?

Grok-4 is developed by xAI and Gemini 2.5 Pro Preview 06-05 is developed by Google.