Model Comparison
Gemini 3.1 Pro vs Grok-4.20 Multi-Agent BetaWhich is better in 2026?
Comparing Gemini 3.1 Pro and Grok-4.20 Multi-Agent Beta across benchmarks, pricing, and capabilities.
Verdict: Gemini 3.1 Pro vs Grok-4.20 Multi-Agent Beta — which is better?
Gemini 3.1 Pro (by Google) and Grok-4.20 Multi-Agent Beta (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 Multi-Agent Beta 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 Multi-Agent Beta 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 Multi-Agent Beta 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 Multi-Agent Betadon'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 Multi-Agent Beta ($2.00/1M tokens).
For output processing, Gemini 3.1 Pro ($15.00/1M tokens) is 2.5x more expensive than Grok-4.20 Multi-Agent Beta ($6.00/1M tokens).
In conclusion, Gemini 3.1 Pro is more expensive than Grok-4.20 Multi-Agent Beta.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok-4.20 Multi-Agent Beta 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 Multi-Agent Beta is limited to 30,000 tokens.
Input Capabilities
Supported data types and modalities
Both Gemini 3.1 Pro and Grok-4.20 Multi-Agent Beta support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 3.1 Pro
Grok-4.20 Multi-Agent Beta
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 Multi-Agent Beta was released on 2026-03-09.
Grok-4.20 Multi-Agent Beta 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 Multi-Agent Beta'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 Multi-Agent Beta's cutoff date.
Jan 2025
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Provider Availability
Gemini 3.1 Pro is available from Google. Grok-4.20 Multi-Agent Beta is available from xAI.
Gemini 3.1 Pro
Grok-4.20 Multi-Agent Beta
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 Multi-Agent Beta.