Gemini 3.1 Pro vs Grok 4.3
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 3.1 Pro by Google wins on 5 of 9 benchmarks against Grok 4.3 by xAI, which leads on 3. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Gemini 3.1 Pro scores 30.4 on AA Intelligence Index compared to Grok 4.3's 25.4.
Coding: In coding, Gemini 3.1 Pro scores 68.8 on AA Coding Index compared to Grok 4.3's 42.2, while Gemini 3.1 Pro scores 1256 on Design Arena ELO compared to Grok 4.3's 1178, while Gemini 3.1 Pro scores 1246 on Website Arena ELO compared to Grok 4.3's 1206.
Reasoning: In reasoning, Grok 4.3 scores 17.2 on AA Agentic Index compared to Gemini 3.1 Pro's 10.3.
Context: In context, Gemini 3.1 Pro scores 1.0M on Context Length compared to Grok 4.3's 1.0M.
Pricing Comparison
Gemini 3.1 Pro costs $2.0/1M input tokens and $12.0/1M output tokens, while Grok 4.3 costs $1.3/1M input and $2.5/1M output. Grok 4.3 is the more affordable option for API usage.
Verdict
Grok 4.3 leads across the board in affordability, making it the stronger overall choice in this comparison.
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Gemini 3.1 Pro vs Grok 4.3 — FAQ
Which is better, Gemini 3.1 Pro or Grok 4.3?
Gemini 3.1 Pro wins on more benchmarks overall (5 vs 3). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 3.1 Pro compare to Grok 4.3 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Gemini 3.1 Pro cheaper than Grok 4.3?
Yes, Grok 4.3 is cheaper. Gemini 3.1 Pro costs $2.0/1M input and $12.0/1M output tokens. Grok 4.3 costs $1.3/1M input and $2.5/1M output tokens.
Which is faster, Gemini 3.1 Pro or Grok 4.3?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the Gemini 3.1 Pro vs Grok 4.3 comparison cover?
This comparison covers 9 benchmarks including Input Cost, Output Cost, Context Length, AA Intelligence Index, AA Coding Index, AA Agentic Index, Cached Input Cost, Design Arena ELO, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.