Gemini 2.5 Pro vs GPT-4.5
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 2.5 Pro by Google wins on 14 of 15 benchmarks against GPT-4.5 by OpenAI, 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
General Intelligence: In general intelligence, Gemini 2.5 Pro scores 1465 on Chatbot Arena ELO compared to GPT-4.5's 1310, while Gemini 2.5 Pro scores 84.0% on MMLU-Pro compared to GPT-4.5's 78.0%, while Gemini 2.5 Pro scores 88.0% on IFEval compared to GPT-4.5's 86.0%.
Coding: In coding, Gemini 2.5 Pro scores 89.0% on HumanEval+ compared to GPT-4.5's 88.0%, while Gemini 2.5 Pro scores 63.8% on SWE-bench Verified compared to GPT-4.5's 38.0%, while Gemini 2.5 Pro scores 58.0% on LiveCodeBench compared to GPT-4.5's 45.0%.
Math: In math, Gemini 2.5 Pro scores 88.0% on MATH compared to GPT-4.5's 82.0%, while Gemini 2.5 Pro scores 95.5% on GSM8K compared to GPT-4.5's 94.0%.
Reasoning: In reasoning, Gemini 2.5 Pro scores 84.0% on GPQA Diamond compared to GPT-4.5's 71.4%, while Gemini 2.5 Pro scores 48.0% on ARC-AGI compared to GPT-4.5's 20.0%.
Context: In context, Gemini 2.5 Pro scores 1.0M on Context Length compared to GPT-4.5's 128K.
Pricing Comparison
Gemini 2.5 Pro costs $1.3/1M input tokens and $10.0/1M output tokens, while GPT-4.5 costs $75.0/1M input and $150.0/1M output. Gemini 2.5 Pro is the more affordable option for API usage.
Speed Comparison
Gemini 2.5 Pro generates output at 55 tok/s compared to GPT-4.5's 60 tok/s, and the time to first token is 500 ms for Gemini 2.5 Pro versus 600 ms for GPT-4.5. GPT-4.5 delivers faster throughput.
Verdict
For developers prioritizing coding and general intelligence and math and affordability, Gemini 2.5 Pro has the edge. For those who value speed, GPT-4.5 is the stronger choice.
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Gemini 2.5 Pro vs GPT-4.5 — FAQ
Which is better, Gemini 2.5 Pro or GPT-4.5?
Gemini 2.5 Pro wins on more benchmarks overall (14 vs 1). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 2.5 Pro compare to GPT-4.5 for coding?
Gemini 2.5 Pro is better for coding, scoring 63.8% on SWE-bench Verified compared to 38.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Gemini 2.5 Pro cheaper than GPT-4.5?
Yes, Gemini 2.5 Pro is cheaper. Gemini 2.5 Pro costs $1.3/1M input and $10.0/1M output tokens. GPT-4.5 costs $75.0/1M input and $150.0/1M output tokens.
Which is faster, Gemini 2.5 Pro or GPT-4.5?
GPT-4.5 is faster, generating output at 60 tok/s compared to 55 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Gemini 2.5 Pro vs GPT-4.5 comparison cover?
This comparison covers 15 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.