GPT-5 vs Grok 3
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5 by OpenAI wins on 12 of 15 benchmarks against Grok 3 by xAI, which leads on 3. 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, Grok 3 scores 1402 on Chatbot Arena ELO compared to GPT-5's 1390, while GPT-5 scores 86.0% on MMLU-Pro compared to Grok 3's 74.0%.
Coding: In coding, GPT-5 scores 92.0% on HumanEval+ compared to Grok 3's 82.0%, while GPT-5 scores 74.9% on SWE-bench Verified compared to Grok 3's 42.0%, while Grok 3 scores 79.4% on LiveCodeBench compared to GPT-5's 78.0%.
Math: In math, GPT-5 scores 94.6% on MATH compared to Grok 3's 82.0%, while GPT-5 scores 98.0% on GSM8K compared to Grok 3's 93.0%, while GPT-5 scores 94.6% on AIME 2025 compared to Grok 3's 93.3%.
Reasoning: In reasoning, GPT-5 scores 87.3% on GPQA Diamond compared to Grok 3's 84.6%, while GPT-5 scores 50.0% on ARC-AGI compared to Grok 3's 28.0%.
Context: In context, Grok 3 scores 1.0M on Context Length compared to GPT-5's 400K.
Pricing Comparison
GPT-5 costs $1.3/1M input tokens and $10.0/1M output tokens, while Grok 3 costs $3.0/1M input and $15.0/1M output. GPT-5 is the more affordable option for API usage.
Speed Comparison
GPT-5 generates output at 100 tok/s compared to Grok 3's 65 tok/s, and the time to first token is 320 ms for GPT-5 versus 400 ms for Grok 3. GPT-5 delivers faster throughput.
Verdict
For developers prioritizing coding and math and affordability and speed, GPT-5 has the edge. For those who value general intelligence, Grok 3 is the stronger choice.
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GPT-5 vs Grok 3 — FAQ
Which is better, GPT-5 or Grok 3?
GPT-5 wins on more benchmarks overall (12 vs 3). However, the best choice depends on your specific needs — each model excels in different areas.
How does GPT-5 compare to Grok 3 for coding?
GPT-5 is better for coding, scoring 74.9% on SWE-bench Verified compared to 42.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is GPT-5 cheaper than Grok 3?
Yes, GPT-5 is cheaper. GPT-5 costs $1.3/1M input and $10.0/1M output tokens. Grok 3 costs $3.0/1M input and $15.0/1M output tokens.
Which is faster, GPT-5 or Grok 3?
GPT-5 is faster, generating output at 100 tok/s compared to 65 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the GPT-5 vs Grok 3 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.