Gemini 3.1 Pro vs Grok-4 Comparison
Comparing Gemini 3.1 Pro and Grok-4 across benchmarks, pricing, and capabilities.
Performance Benchmarks
Comparative analysis across standard metrics
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.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
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
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.
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
Grok-4
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
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.
Feb 19, 2026
3 weeks ago
7mo newerJul 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).
Jan 2025
1 mo newerDec 2024
Provider Availability
Gemini 3.1 Pro is available from Google. Grok-4 is available from xAI. The availability of providers can affect quality of the model and reliability.
Gemini 3.1 Pro
Grok-4
Outputs Comparison
Key Takeaways
Detailed Comparison
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