Grok 2 vs o3
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
o3 by OpenAI wins on 16 of 19 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, o3 scores 1380 on Chatbot Arena ELO compared to Grok 2's 1250, while o3 scores 84.0% on MMLU-Pro compared to Grok 2's 68.0%, while o3 scores 9.5 on MT-Bench compared to Grok 2's 8.8, while o3 scores 49.4% on SimpleQA compared to Grok 2's 36.4%, while o3 scores 86.0% on TruthfulQA compared to Grok 2's 79.0%.
Coding: In coding, o3 scores 90.0% on HumanEval+ compared to Grok 2's 78.0%, while o3 scores 69.1% on SWE-bench Verified compared to Grok 2's 28.0%, while o3 scores 70.0% on LiveCodeBench compared to Grok 2's 32.0%.
Math: In math, o3 scores 96.0% on MATH compared to Grok 2's 70.0%, while o3 scores 98.5% on GSM8K compared to Grok 2's 88.0%.
Reasoning: In reasoning, o3 scores 83.3% on GPQA Diamond compared to Grok 2's 45.0%, while o3 scores 75.7% on ARC-AGI compared to Grok 2's 15.0%, while o3 scores 94.0% on Winogrande compared to Grok 2's 88.5%.
Context: In context, o3 scores 200K on Context Length compared to Grok 2's 131K.
Multimodal: In multimodal, o3 scores 86.8% on MathVista compared to Grok 2's 60.5%.
Pricing Comparison
Grok 2 costs $2.0/1M input tokens and $10.0/1M output tokens, while o3 costs $2.0/1M input and $8.0/1M output. Both models are priced identically for input tokens.
Speed Comparison
Grok 2 generates output at 80 tok/s compared to o3's 40 tok/s, and the time to first token is 350 ms for Grok 2 versus 800 ms for o3. Grok 2 delivers faster throughput.
Verdict
For developers prioritizing speed, Grok 2 has the edge. For those who value coding and general intelligence and math, o3 is the stronger choice.
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Grok 2 vs o3 — FAQ
Which is better, Grok 2 or o3?
o3 wins on more benchmarks overall (16 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does Grok 2 compare to o3 for coding?
o3 is better for coding, scoring 69.1% on SWE-bench Verified compared to 28.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Grok 2 cheaper than o3?
Both models are priced the same at $2.0/1M input tokens. Grok 2 output costs $10.0/1M and o3 output costs $8.0/1M.
Which is faster, Grok 2 or o3?
Grok 2 is faster, generating output at 80 tok/s compared to 40 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Grok 2 vs o3 comparison cover?
This comparison covers 19 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MT-Bench, SimpleQA, MATH, TruthfulQA, GPQA Diamond, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.