Grok 4 Fast vs o1
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Grok 4 Fast by xAI and o1 by OpenAI are evenly matched across 14 benchmarks. 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 4 Fast scores 1370 on Chatbot Arena ELO compared to o1's 1360, while o1 scores 82.0% on MMLU-Pro compared to Grok 4 Fast's 80.0%.
Coding: In coding, o1 scores 89.0% on HumanEval+ compared to Grok 4 Fast's 85.0%, while o1 scores 48.9% on SWE-bench Verified compared to Grok 4 Fast's 48.0%, while o1 scores 55.0% on LiveCodeBench compared to Grok 4 Fast's 52.0%.
Math: In math, o1 scores 94.8% on MATH compared to Grok 4 Fast's 84.0%, while o1 scores 97.5% on GSM8K compared to Grok 4 Fast's 94.0%.
Reasoning: In reasoning, o1 scores 77.3% on GPQA Diamond compared to Grok 4 Fast's 60.0%, while Grok 4 Fast scores 38.0% on ARC-AGI compared to o1's 32.0%.
Context: In context, Grok 4 Fast scores 256K on Context Length compared to o1's 200K.
Pricing Comparison
Grok 4 Fast costs $0.20/1M input tokens and $0.50/1M output tokens, while o1 costs $15.0/1M input and $60.0/1M output. Grok 4 Fast is the more affordable option for API usage.
Speed Comparison
Grok 4 Fast generates output at 110 tok/s compared to o1's 35 tok/s, and the time to first token is 220 ms for Grok 4 Fast versus 1000 ms for o1. Grok 4 Fast delivers faster throughput.
Verdict
For developers prioritizing general intelligence and affordability and speed, Grok 4 Fast has the edge. For those who value coding and math, o1 is the stronger choice.
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Grok 4 Fast vs o1 — FAQ
Which is better, Grok 4 Fast or o1?
Grok 4 Fast and o1 are evenly matched across benchmarks. The best choice depends on your specific priorities such as coding ability, speed, or pricing.
How does Grok 4 Fast compare to o1 for coding?
o1 is better for coding, scoring 48.9% on SWE-bench Verified compared to 48.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Grok 4 Fast cheaper than o1?
Yes, Grok 4 Fast is cheaper. Grok 4 Fast costs $0.20/1M input and $0.50/1M output tokens. o1 costs $15.0/1M input and $60.0/1M output tokens.
Which is faster, Grok 4 Fast or o1?
Grok 4 Fast is faster, generating output at 110 tok/s compared to 35 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Grok 4 Fast vs o1 comparison cover?
This comparison covers 14 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.