Claude Sonnet 4.5 vs Gemini 3.5 Flash Lite
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 3.5 Flash Lite by Google wins on 7 of 9 benchmarks against Claude Sonnet 4.5 by Anthropic, 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, Gemini 3.5 Flash Lite scores 22.7 on AA Intelligence Index compared to Claude Sonnet 4.5's 21.2.
Coding: In coding, Claude Sonnet 4.5 scores 52.1 on AA Coding Index compared to Gemini 3.5 Flash Lite's 49.3.
Reasoning: In reasoning, Gemini 3.5 Flash Lite scores 83.5% on GPQA Diamond compared to Claude Sonnet 4.5's 82.5%, while Claude Sonnet 4.5 scores 17.5 on AA Agentic Index compared to Gemini 3.5 Flash Lite's 15.9, while Gemini 3.5 Flash Lite scores 75.7% on τ²-Bench Airline compared to Claude Sonnet 4.5's 73.0%.
Context: In context, Gemini 3.5 Flash Lite scores 1.0M on Context Length compared to Claude Sonnet 4.5's 1.0M.
Pricing Comparison
Claude Sonnet 4.5 costs $3.0/1M input tokens and $15.0/1M output tokens, while Gemini 3.5 Flash Lite costs $0.30/1M input and $2.5/1M output. Gemini 3.5 Flash Lite is the more affordable option for API usage.
Verdict
Gemini 3.5 Flash Lite leads across the board in affordability, making it the stronger overall choice in this comparison.
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Claude Sonnet 4.5 vs Gemini 3.5 Flash Lite — FAQ
Which is better, Claude Sonnet 4.5 or Gemini 3.5 Flash Lite?
Gemini 3.5 Flash Lite wins on more benchmarks overall (7 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Sonnet 4.5 compare to Gemini 3.5 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 Sonnet 4.5 cheaper than Gemini 3.5 Flash Lite?
Yes, Gemini 3.5 Flash Lite is cheaper. Claude Sonnet 4.5 costs $3.0/1M input and $15.0/1M output tokens. Gemini 3.5 Flash Lite costs $0.30/1M input and $2.5/1M output tokens.
Which is faster, Claude Sonnet 4.5 or Gemini 3.5 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 Sonnet 4.5 vs Gemini 3.5 Flash Lite comparison cover?
This comparison covers 9 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, AA Intelligence Index, AA Coding Index, AA Agentic Index, Cached Input Cost, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.