Gemini 3.1 Flash Lite vs GPT-5.1
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 3.1 Flash Lite by Google and GPT-5.1 by OpenAI 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, GPT-5.1 scores 1158 on Design Arena ELO compared to Gemini 3.1 Flash Lite's 1090, while GPT-5.1 scores 1179 on Website Arena ELO compared to Gemini 3.1 Flash Lite's 1095.
Reasoning: In reasoning, GPT-5.1 scores 86.2% on GPQA Diamond compared to Gemini 3.1 Flash Lite's 80.1%, while GPT-5.1 scores 75.7% 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 GPT-5.1's 400K.
Pricing Comparison
Gemini 3.1 Flash Lite costs $0.25/1M input tokens and $1.5/1M output tokens, while GPT-5.1 costs $1.3/1M input and $10.0/1M 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.
View Individual Model Pages
Gemini 3.1 Flash Lite vs GPT-5.1 — FAQ
Which is better, Gemini 3.1 Flash Lite or GPT-5.1?
Gemini 3.1 Flash Lite and GPT-5.1 are evenly matched across benchmarks. The best choice depends on your specific priorities such as coding ability, speed, or pricing.
How does Gemini 3.1 Flash Lite compare to GPT-5.1 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Gemini 3.1 Flash Lite cheaper than GPT-5.1?
Yes, Gemini 3.1 Flash Lite is cheaper. Gemini 3.1 Flash Lite costs $0.25/1M input and $1.5/1M output tokens. GPT-5.1 costs $1.3/1M input and $10.0/1M output tokens.
Which is faster, Gemini 3.1 Flash Lite or GPT-5.1?
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 Gemini 3.1 Flash Lite vs GPT-5.1 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.