Claude Opus 4.5 vs Gemini 3 Pro
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 3 Pro by Google wins on 13 of 16 benchmarks against Claude Opus 4.5 by Anthropic, 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 Pro scores 1492 on Chatbot Arena ELO compared to Claude Opus 4.5's 1468, while Gemini 3 Pro scores 89.8% on MMLU-Pro compared to Claude Opus 4.5's 89.5%, while Gemini 3 Pro scores 91.0% on IFEval compared to Claude Opus 4.5's 90.0%.
Coding: In coding, Claude Opus 4.5 scores 92.0% on HumanEval+ compared to Gemini 3 Pro's 91.0%, while Claude Opus 4.5 scores 80.9% on SWE-bench Verified compared to Gemini 3 Pro's 65.0%, while Gemini 3 Pro scores 72.0% on LiveCodeBench compared to Claude Opus 4.5's 70.0%.
Math: In math, Gemini 3 Pro scores 92.0% on MATH compared to Claude Opus 4.5's 90.0%, while Gemini 3 Pro scores 97.5% on GSM8K compared to Claude Opus 4.5's 96.5%, while Gemini 3 Pro scores 95.0% on AIME 2025 compared to Claude Opus 4.5's 72.0%.
Reasoning: In reasoning, Gemini 3 Pro scores 91.9% on GPQA Diamond compared to Claude Opus 4.5's 87.0%, while Claude Opus 4.5 scores 57.0% on ARC-AGI compared to Gemini 3 Pro's 54.0%.
Context: In context, Gemini 3 Pro scores 1.0M on Context Length compared to Claude Opus 4.5's 200K.
Pricing Comparison
Claude Opus 4.5 costs $5.0/1M input tokens and $25.0/1M output tokens, while Gemini 3 Pro costs $2.0/1M input and $12.0/1M output. Gemini 3 Pro is the more affordable option for API usage.
Speed Comparison
Claude Opus 4.5 generates output at 50 tok/s compared to Gemini 3 Pro's 60 tok/s, and the time to first token is 1700 ms for Claude Opus 4.5 versus 450 ms for Gemini 3 Pro. Gemini 3 Pro delivers faster throughput.
Verdict
For developers prioritizing coding, Claude Opus 4.5 has the edge. For those who value general intelligence and math and affordability and speed, Gemini 3 Pro is the stronger choice.
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Claude Opus 4.5 vs Gemini 3 Pro — FAQ
Which is better, Claude Opus 4.5 or Gemini 3 Pro?
Gemini 3 Pro wins on more benchmarks overall (13 vs 3). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Opus 4.5 compare to Gemini 3 Pro for coding?
Claude Opus 4.5 is better for coding, scoring 80.9% on SWE-bench Verified compared to 65.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude Opus 4.5 cheaper than Gemini 3 Pro?
Yes, Gemini 3 Pro is cheaper. Claude Opus 4.5 costs $5.0/1M input and $25.0/1M output tokens. Gemini 3 Pro costs $2.0/1M input and $12.0/1M output tokens.
Which is faster, Claude Opus 4.5 or Gemini 3 Pro?
Gemini 3 Pro is faster, generating output at 60 tok/s compared to 50 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Claude Opus 4.5 vs Gemini 3 Pro comparison cover?
This comparison covers 16 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, IFEval, MATH, GPQA Diamond, SWE-bench Verified, Output Speed, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.