Gemini 2.5 Flash Lite vs Gemini 3 Pro
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 3 Pro by Google wins on 9 of 14 benchmarks against Gemini 2.5 Flash Lite by Google, which leads on 5. 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 Gemini 2.5 Flash Lite's 1230, while Gemini 3 Pro scores 89.8% on MMLU-Pro compared to Gemini 2.5 Flash Lite's 63.0%.
Coding: In coding, Gemini 3 Pro scores 91.0% on HumanEval+ compared to Gemini 2.5 Flash Lite's 70.0%, while Gemini 3 Pro scores 65.0% on SWE-bench Verified compared to Gemini 2.5 Flash Lite's 22.0%, while Gemini 3 Pro scores 72.0% on LiveCodeBench compared to Gemini 2.5 Flash Lite's 28.0%.
Math: In math, Gemini 3 Pro scores 92.0% on MATH compared to Gemini 2.5 Flash Lite's 62.0%, while Gemini 3 Pro scores 97.5% on GSM8K compared to Gemini 2.5 Flash Lite's 83.0%.
Reasoning: In reasoning, Gemini 3 Pro scores 91.9% on GPQA Diamond compared to Gemini 2.5 Flash Lite's 32.0%, while Gemini 3 Pro scores 54.0% on ARC-AGI compared to Gemini 2.5 Flash Lite's 14.0%.
Context: In context, Gemini 2.5 Flash Lite scores 1.0M on Context Length compared to Gemini 3 Pro's 1.0M.
Pricing Comparison
Gemini 2.5 Flash Lite costs $0.10/1M input tokens and $0.40/1M output tokens, while Gemini 3 Pro costs $2.0/1M input and $12.0/1M output. Gemini 2.5 Flash Lite is the more affordable option for API usage.
Speed Comparison
Gemini 2.5 Flash Lite generates output at 240 tok/s compared to Gemini 3 Pro's 60 tok/s, and the time to first token is 70 ms for Gemini 2.5 Flash Lite versus 450 ms for Gemini 3 Pro. Gemini 2.5 Flash Lite delivers faster throughput.
Verdict
For developers prioritizing affordability and speed, Gemini 2.5 Flash Lite has the edge. For those who value coding and general intelligence and math, Gemini 3 Pro is the stronger choice.
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Gemini 2.5 Flash Lite vs Gemini 3 Pro — FAQ
Which is better, Gemini 2.5 Flash Lite or Gemini 3 Pro?
Gemini 3 Pro wins on more benchmarks overall (9 vs 5). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 2.5 Flash Lite compare to Gemini 3 Pro for coding?
Gemini 3 Pro is better for coding, scoring 65.0% on SWE-bench Verified compared to 22.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Gemini 2.5 Flash Lite cheaper than Gemini 3 Pro?
Yes, Gemini 2.5 Flash Lite is cheaper. Gemini 2.5 Flash Lite costs $0.10/1M input and $0.40/1M output tokens. Gemini 3 Pro costs $2.0/1M input and $12.0/1M output tokens.
Which is faster, Gemini 2.5 Flash Lite or Gemini 3 Pro?
Gemini 2.5 Flash Lite is faster, generating output at 240 tok/s compared to 60 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Gemini 2.5 Flash Lite vs Gemini 3 Pro comparison cover?
This comparison covers 14 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.