Gemini 3 Flash vs GPT-5
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 3 Flash by Google wins on 9 of 16 benchmarks against GPT-5 by OpenAI, which leads on 7. 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 Flash scores 1473 on Chatbot Arena ELO compared to GPT-5's 1390, while Gemini 3 Flash scores 88.6% on MMLU-Pro compared to GPT-5's 86.0%, while GPT-5 scores 90.0% on IFEval compared to Gemini 3 Flash's 89.0%.
Coding: In coding, GPT-5 scores 92.0% on HumanEval+ compared to Gemini 3 Flash's 86.0%, while Gemini 3 Flash scores 78.0% on SWE-bench Verified compared to GPT-5's 74.9%, while GPT-5 scores 78.0% on LiveCodeBench compared to Gemini 3 Flash's 55.0%.
Math: In math, GPT-5 scores 94.6% on MATH compared to Gemini 3 Flash's 85.0%, while GPT-5 scores 98.0% on GSM8K compared to Gemini 3 Flash's 95.0%.
Reasoning: In reasoning, GPT-5 scores 87.3% on GPQA Diamond compared to Gemini 3 Flash's 72.0%, while GPT-5 scores 50.0% on ARC-AGI compared to Gemini 3 Flash's 30.0%.
Context: In context, Gemini 3 Flash scores 1.0M on Context Length compared to GPT-5's 400K.
Pricing Comparison
Gemini 3 Flash costs $0.50/1M input tokens and $3.0/1M output tokens, while GPT-5 costs $1.3/1M input and $10.0/1M output. Gemini 3 Flash is the more affordable option for API usage.
Speed Comparison
Gemini 3 Flash generates output at 200 tok/s compared to GPT-5's 100 tok/s, and the time to first token is 100 ms for Gemini 3 Flash versus 320 ms for GPT-5. Gemini 3 Flash delivers faster throughput.
Verdict
For developers prioritizing coding and general intelligence and affordability and speed, Gemini 3 Flash has the edge. For those who value math, GPT-5 is the stronger choice.
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Gemini 3 Flash vs GPT-5 — FAQ
Which is better, Gemini 3 Flash or GPT-5?
Gemini 3 Flash wins on more benchmarks overall (9 vs 7). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 3 Flash compare to GPT-5 for coding?
Gemini 3 Flash is better for coding, scoring 78.0% on SWE-bench Verified compared to 74.9%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Gemini 3 Flash cheaper than GPT-5?
Yes, Gemini 3 Flash is cheaper. Gemini 3 Flash costs $0.50/1M input and $3.0/1M output tokens. GPT-5 costs $1.3/1M input and $10.0/1M output tokens.
Which is faster, Gemini 3 Flash or GPT-5?
Gemini 3 Flash is faster, generating output at 200 tok/s compared to 100 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Gemini 3 Flash vs GPT-5 comparison cover?
This comparison covers 16 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, IFEval, MATH, GPQA Diamond, SWE-bench Verified, Output Speed, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.