Gemini 3 Pro vs GPT-5.6 Luna
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.6 Luna by OpenAI wins on 3 of 4 benchmarks against Gemini 3 Pro by Google, which leads on 1. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Reasoning: In reasoning, Gemini 3 Pro scores 91.9% on GPQA Diamond compared to GPT-5.6 Luna's 87.7%.
Context: In context, GPT-5.6 Luna scores 1.1M on Context Length compared to Gemini 3 Pro's 1.0M.
Pricing Comparison
Gemini 3 Pro costs $2.0/1M input tokens and $12.0/1M output tokens, while GPT-5.6 Luna costs $0.20/1M input and $1.2/1M output. GPT-5.6 Luna is the more affordable option for API usage.
Verdict
GPT-5.6 Luna leads across the board in affordability, making it the stronger overall choice in this comparison.
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Gemini 3 Pro vs GPT-5.6 Luna — FAQ
Which is better, Gemini 3 Pro or GPT-5.6 Luna?
GPT-5.6 Luna wins on more benchmarks overall (3 vs 1). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 3 Pro compare to GPT-5.6 Luna 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 Pro cheaper than GPT-5.6 Luna?
Yes, GPT-5.6 Luna is cheaper. Gemini 3 Pro costs $2.0/1M input and $12.0/1M output tokens. GPT-5.6 Luna costs $0.20/1M input and $1.2/1M output tokens.
Which is faster, Gemini 3 Pro or GPT-5.6 Luna?
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 Pro vs GPT-5.6 Luna comparison cover?
This comparison covers 4 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.