Gemini 3.1 Pro vs Grok 4.5
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Grok 4.5 by xAI wins on 6 of 9 benchmarks against Gemini 3.1 Pro by Google, which leads on 2. 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, Grok 4.5 scores 39.1 on AA Intelligence Index compared to Gemini 3.1 Pro's 30.4.
Coding: In coding, Grok 4.5 scores 72.4 on AA Coding Index compared to Gemini 3.1 Pro's 68.8, while Grok 4.5 scores 1283 on Design Arena ELO compared to Gemini 3.1 Pro's 1256, while Grok 4.5 scores 1296 on Website Arena ELO compared to Gemini 3.1 Pro's 1246.
Reasoning: In reasoning, Grok 4.5 scores 42.1 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 4.5's 500K.
Pricing Comparison
Gemini 3.1 Pro costs $2.0/1M input tokens and $12.0/1M output tokens, while Grok 4.5 costs $2.0/1M input and $6.0/1M output. Both models are priced identically for input tokens.
Verdict
Gemini 3.1 Pro and Grok 4.5 are closely matched. The best choice depends on your specific use case and priorities.
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Gemini 3.1 Pro vs Grok 4.5 — FAQ
Which is better, Gemini 3.1 Pro or Grok 4.5?
Grok 4.5 wins on more benchmarks overall (6 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 3.1 Pro compare to Grok 4.5 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 4.5?
Both models are priced the same at $2.0/1M input tokens. Gemini 3.1 Pro output costs $12.0/1M and Grok 4.5 output costs $6.0/1M.
Which is faster, Gemini 3.1 Pro or Grok 4.5?
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 4.5 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.