Claude 3 Opus vs Gemini 2.5 Flash
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 2.5 Flash by Google wins on 14 of 15 benchmarks against Claude 3 Opus by Anthropic, which leads on 1. 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 2.5 Flash scores 1320 on Chatbot Arena ELO compared to Claude 3 Opus's 1240, while Gemini 2.5 Flash scores 73.0% on MMLU-Pro compared to Claude 3 Opus's 68.0%.
Coding: In coding, Gemini 2.5 Flash scores 82.0% on HumanEval+ compared to Claude 3 Opus's 78.0%, while Gemini 2.5 Flash scores 38.0% on SWE-bench Verified compared to Claude 3 Opus's 22.0%, while Gemini 2.5 Flash scores 42.0% on LiveCodeBench compared to Claude 3 Opus's 32.0%.
Math: In math, Gemini 2.5 Flash scores 76.0% on MATH compared to Claude 3 Opus's 68.0%, while Gemini 2.5 Flash scores 91.0% on GSM8K compared to Claude 3 Opus's 88.0%.
Reasoning: In reasoning, Claude 3 Opus scores 59.4% on GPQA Diamond compared to Gemini 2.5 Flash's 48.0%, while Gemini 2.5 Flash scores 25.0% on ARC-AGI compared to Claude 3 Opus's 8.0%, while Gemini 2.5 Flash scores 89.8% on BBH compared to Claude 3 Opus's 86.8%.
Context: In context, Gemini 2.5 Flash scores 1.0M on Context Length compared to Claude 3 Opus's 200K.
Pricing Comparison
Claude 3 Opus costs $15.0/1M input tokens and $75.0/1M output tokens, while Gemini 2.5 Flash costs $0.30/1M input and $2.5/1M output. Gemini 2.5 Flash is the more affordable option for API usage.
Speed Comparison
Claude 3 Opus generates output at 25 tok/s compared to Gemini 2.5 Flash's 251 tok/s, and the time to first token is 800 ms for Claude 3 Opus versus 410 ms for Gemini 2.5 Flash. Gemini 2.5 Flash delivers faster throughput.
Verdict
Gemini 2.5 Flash leads across the board in coding, general intelligence, math, affordability, speed, making it the stronger overall choice in this comparison.
View Individual Model Pages
Claude 3 Opus vs Gemini 2.5 Flash — FAQ
Which is better, Claude 3 Opus or Gemini 2.5 Flash?
Gemini 2.5 Flash wins on more benchmarks overall (14 vs 1). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude 3 Opus compare to Gemini 2.5 Flash for coding?
Gemini 2.5 Flash is better for coding, scoring 38.0% on SWE-bench Verified compared to 22.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude 3 Opus cheaper than Gemini 2.5 Flash?
Yes, Gemini 2.5 Flash is cheaper. Claude 3 Opus costs $15.0/1M input and $75.0/1M output tokens. Gemini 2.5 Flash costs $0.30/1M input and $2.5/1M output tokens.
Which is faster, Claude 3 Opus or Gemini 2.5 Flash?
Gemini 2.5 Flash is faster, generating output at 251 tok/s compared to 25 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Claude 3 Opus vs Gemini 2.5 Flash comparison cover?
This comparison covers 15 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, GPQA Diamond, SWE-bench Verified, Output Speed, LiveCodeBench, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.