Gemini 3.1 Pro vs Grok 4.20
Pricing, context window, and benchmark comparison · Last updated April 2026
Grok 4.20 is cheaper than Gemini 3.1 Pro at $2.00/1M/1M vs $2.00/1M/1M input tokens. Gemini 3.1 Pro scores higher on quality benchmarks (ELO 1410). Choose Grok 4.20 for cost-sensitive workloads; choose Gemini 3.1 Pro for maximum quality.
Which is cheaper: Gemini 3.1 Pro or Grok 4.20?
Gemini 3.1 Pro and Grok 4.20 are identically priced at $2.00/1M per 1M input tokens. Output pricing follows a similar pattern: Gemini 3.1 Pro charges $12.00/1M/1M vs $6.00/1M/1M for Grok 4.20.
Which has better quality: Gemini 3.1 Pro or Grok 4.20?
Based on LMSYS Chatbot Arena rankings, Gemini 3.1 Pro achieves a higher ELO score (1410 vs 1380), suggesting stronger performance on open-ended tasks. Gemini 3.1 Pro excels at google's latest flagship with major reasoning improvements. Grok 4.20 is known for 2m token context window — tied for largest available.
Which should you choose: Gemini 3.1 Pro or Grok 4.20?
- → Google's latest flagship with major reasoning improvements
- → 1M token context window
- → Native multimodal (text, image, video, audio)
- → 2M token context window — tied for largest available
- → Real-time X (Twitter) data access
- → Strong reasoning and multi-agent variants
Frequently Asked Questions
Which is cheaper: Gemini 3.1 Pro or Grok 4.20?
Gemini 3.1 Pro and Grok 4.20 have the same input price of $2.00/1M per 1M tokens.
Which has better quality: Gemini 3.1 Pro or Grok 4.20?
Gemini 3.1 Pro scores higher on the LMSYS Chatbot Arena with an ELO of 1410, suggesting better overall quality for most tasks.
Which has a larger context window: Gemini 3.1 Pro or Grok 4.20?
Grok 4.20 has a larger context window at 2000K tokens.
Should I choose Gemini 3.1 Pro or Grok 4.20?
Choose Grok 4.20 if cost is the priority. Choose Gemini 3.1 Pro if benchmark quality is most important. Consider your specific use case: Gemini 3.1 Pro is best for reasoning and long-context, while Grok 4.20 excels at reasoning and research.
Is Gemini 3.1 Pro or Grok 4.20 open source?
Gemini 3.1 Pro is proprietary. Grok 4.20 is proprietary.