Gemini 2.5 Pro vs Grok 2
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Gemini 2.5 Pro by Google wins on 15 of 18 benchmarks against Grok 2 by xAI, which leads on 2. 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 Grok 2's 1250, while Gemini 2.5 Pro scores 84.0% on MMLU-Pro compared to Grok 2's 68.0%, while Gemini 2.5 Pro scores 9.3 on MT-Bench compared to Grok 2's 8.8, while Gemini 2.5 Pro scores 84.8% on TruthfulQA compared to Grok 2's 79.0%.
Coding: In coding, Gemini 2.5 Pro scores 89.0% on HumanEval+ compared to Grok 2's 78.0%, while Gemini 2.5 Pro scores 63.8% on SWE-bench Verified compared to Grok 2's 28.0%, while Gemini 2.5 Pro scores 58.0% on LiveCodeBench compared to Grok 2's 32.0%.
Math: In math, Gemini 2.5 Pro scores 88.0% on MATH compared to Grok 2's 70.0%, while Gemini 2.5 Pro scores 95.5% on GSM8K compared to Grok 2's 88.0%.
Reasoning: In reasoning, Gemini 2.5 Pro scores 84.0% on GPQA Diamond compared to Grok 2's 45.0%, while Gemini 2.5 Pro scores 48.0% on ARC-AGI compared to Grok 2's 15.0%, while Gemini 2.5 Pro scores 92.0% on Winogrande compared to Grok 2's 88.5%.
Context: In context, Gemini 2.5 Pro scores 1.0M on Context Length compared to Grok 2's 131K.
Multimodal: In multimodal, Gemini 2.5 Pro scores 80.4% on MathVista compared to Grok 2's 60.5%.
Pricing Comparison
Gemini 2.5 Pro costs $1.3/1M input tokens and $10.0/1M output tokens, while Grok 2 costs $2.0/1M input and $10.0/1M 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 Grok 2's 80 tok/s, and the time to first token is 500 ms for Gemini 2.5 Pro versus 350 ms for Grok 2. Grok 2 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, Grok 2 is the stronger choice.
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Gemini 2.5 Pro vs Grok 2 — FAQ
Which is better, Gemini 2.5 Pro or Grok 2?
Gemini 2.5 Pro wins on more benchmarks overall (15 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 2.5 Pro compare to Grok 2 for coding?
Gemini 2.5 Pro is better for coding, scoring 63.8% on SWE-bench Verified compared to 28.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Gemini 2.5 Pro cheaper than Grok 2?
Yes, Gemini 2.5 Pro is cheaper. Gemini 2.5 Pro costs $1.3/1M input and $10.0/1M output tokens. Grok 2 costs $2.0/1M input and $10.0/1M output tokens.
Which is faster, Gemini 2.5 Pro or Grok 2?
Grok 2 is faster, generating output at 80 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 Grok 2 comparison cover?
This comparison covers 18 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MT-Bench, MATH, TruthfulQA, GPQA Diamond, SWE-bench Verified, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.