Gemini 2.5 Flash Lite vs GPT-5
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5 by OpenAI wins on 9 of 15 benchmarks against Gemini 2.5 Flash Lite by Google, which leads on 6. 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, GPT-5 scores 1390 on Chatbot Arena ELO compared to Gemini 2.5 Flash Lite's 1230, while GPT-5 scores 86.0% on MMLU-Pro compared to Gemini 2.5 Flash Lite's 63.0%.
Coding: In coding, GPT-5 scores 92.0% on HumanEval+ compared to Gemini 2.5 Flash Lite's 70.0%, while GPT-5 scores 74.9% on SWE-bench Verified compared to Gemini 2.5 Flash Lite's 22.0%, while GPT-5 scores 78.0% on LiveCodeBench compared to Gemini 2.5 Flash Lite's 28.0%.
Math: In math, GPT-5 scores 94.6% on MATH compared to Gemini 2.5 Flash Lite's 62.0%, while GPT-5 scores 98.0% on GSM8K compared to Gemini 2.5 Flash Lite's 83.0%.
Reasoning: In reasoning, GPT-5 scores 87.3% on GPQA Diamond compared to Gemini 2.5 Flash Lite's 32.0%, while GPT-5 scores 50.0% 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 GPT-5's 400K.
Pricing Comparison
Gemini 2.5 Flash Lite costs $0.10/1M input tokens and $0.40/1M output tokens, while GPT-5 costs $1.3/1M input and $10.0/1M 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 GPT-5's 100 tok/s, and the time to first token is 70 ms for Gemini 2.5 Flash Lite versus 320 ms for GPT-5. 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, GPT-5 is the stronger choice.
View Individual Model Pages
Gemini 2.5 Flash Lite vs GPT-5 — FAQ
Which is better, Gemini 2.5 Flash Lite or GPT-5?
GPT-5 wins on more benchmarks overall (9 vs 6). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 2.5 Flash Lite compare to GPT-5 for coding?
GPT-5 is better for coding, scoring 74.9% 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 GPT-5?
Yes, Gemini 2.5 Flash Lite is cheaper. Gemini 2.5 Flash Lite costs $0.10/1M input and $0.40/1M output tokens. GPT-5 costs $1.3/1M input and $10.0/1M output tokens.
Which is faster, Gemini 2.5 Flash Lite or GPT-5?
Gemini 2.5 Flash Lite is faster, generating output at 240 tok/s compared to 100 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Gemini 2.5 Flash Lite vs GPT-5 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.