Model Comparison
Gemini 3.1 Pro vs Grok-4.20 Beta Non-ReasoningWhich is better in 2026?
Comparing Gemini 3.1 Pro and Grok-4.20 Beta Non-Reasoning across benchmarks, pricing, and capabilities.
Verdict: Gemini 3.1 Pro vs Grok-4.20 Beta Non-Reasoning — which is better?
Gemini 3.1 Pro (by Google) and Grok-4.20 Beta Non-Reasoning (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.
On price, Grok-4.20 Beta Non-Reasoning is roughly 1.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok-4.20 Beta Non-Reasoning also accepts a larger context window (2,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Choose Gemini 3.1 Pro if…
- you want predictable pricing at $2.50/M input and $15.00/M output
Choose Grok-4.20 Beta Non-Reasoning if…
- cost matters — it's about 1.9x cheaper per token
- you process long inputs — it offers a 2,000,000 token context window
- you want the most recent training data — it shipped Mar 2026
Performance Benchmarks
Comparative analysis across standard metrics
Gemini 3.1 Pro and Grok-4.20 Beta Non-Reasoningdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 3.1 Pro ($2.50/1M tokens) is 1.3x more expensive than Grok-4.20 Beta Non-Reasoning ($2.00/1M tokens).
For output processing, Gemini 3.1 Pro ($15.00/1M tokens) is 2.5x more expensive than Grok-4.20 Beta Non-Reasoning ($6.00/1M tokens).
In conclusion, Gemini 3.1 Pro is more expensive than Grok-4.20 Beta Non-Reasoning.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok-4.20 Beta Non-Reasoning accepts 2,000,000 input tokens compared to Gemini 3.1 Pro's 1,048,576 tokens. Gemini 3.1 Pro can generate longer responses up to 65,536 tokens, while Grok-4.20 Beta Non-Reasoning is limited to 30,000 tokens.
Input Capabilities
Supported data types and modalities
Both Gemini 3.1 Pro and Grok-4.20 Beta Non-Reasoning support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 3.1 Pro
Grok-4.20 Beta Non-Reasoning
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-4.20 Beta Non-Reasoning was released on 2026-03-09.
Grok-4.20 Beta Non-Reasoning is 1 month newer than Gemini 3.1 Pro.
Feb 19, 2026
3 months ago
Mar 9, 2026
3 months ago
2w newerKnowledge Cutoff
When training data ends
Gemini 3.1 Pro has a documented knowledge cutoff of 2025-01-31, while Grok-4.20 Beta Non-Reasoning'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-4.20 Beta Non-Reasoning's cutoff date.
Jan 2025
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Provider Availability
Gemini 3.1 Pro is available from Google. Grok-4.20 Beta Non-Reasoning is available from xAI.
Gemini 3.1 Pro
Grok-4.20 Beta Non-Reasoning
Outputs Comparison
Key Takeaways
No standout differentiators in the data we have for this pair.
Detailed Comparison
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FAQ
Common questions about Gemini 3.1 Pro vs Grok-4.20 Beta Non-Reasoning.