Claude Opus 4.5 vs Gemini 3.1 Flash Lite
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Claude Opus 4.5 by Anthropic and Gemini 3.1 Flash Lite by Google are evenly matched across 8 benchmarks. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Coding: In coding, Claude Opus 4.5 scores 1242 on Design Arena ELO compared to Gemini 3.1 Flash Lite's 1090, while Claude Opus 4.5 scores 1259 on Website Arena ELO compared to Gemini 3.1 Flash Lite's 1095.
Reasoning: In reasoning, Claude Opus 4.5 scores 86.5% on GPQA Diamond compared to Gemini 3.1 Flash Lite's 80.1%, while Claude Opus 4.5 scores 77.0% on τ²-Bench Airline compared to Gemini 3.1 Flash Lite's 72.3%.
Context: In context, Gemini 3.1 Flash Lite 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 3.1 Flash Lite costs $0.25/1M input and $1.5/1M output. Gemini 3.1 Flash Lite is the more affordable option for API usage.
Verdict
Gemini 3.1 Flash Lite leads across the board in affordability, making it the stronger overall choice in this comparison.
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Claude Opus 4.5 vs Gemini 3.1 Flash Lite — FAQ
Which is better, Claude Opus 4.5 or Gemini 3.1 Flash Lite?
Claude Opus 4.5 and Gemini 3.1 Flash Lite are evenly matched across benchmarks. The best choice depends on your specific priorities such as coding ability, speed, or pricing.
How does Claude Opus 4.5 compare to Gemini 3.1 Flash Lite for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Claude Opus 4.5 cheaper than Gemini 3.1 Flash Lite?
Yes, Gemini 3.1 Flash Lite is cheaper. Claude Opus 4.5 costs $5.0/1M input and $25.0/1M output tokens. Gemini 3.1 Flash Lite costs $0.25/1M input and $1.5/1M output tokens.
Which is faster, Claude Opus 4.5 or Gemini 3.1 Flash Lite?
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 Claude Opus 4.5 vs Gemini 3.1 Flash Lite comparison cover?
This comparison covers 8 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, Cached Input Cost, Design Arena ELO, τ²-Bench Airline, Website Arena ELO. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.