Claude 3 Opus vs Grok 4 Fast
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Grok 4 Fast by xAI wins on 14 of 14 benchmarks against Claude 3 Opus by Anthropic, which leads on 0. 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 Claude 3 Opus's 1240, while Grok 4 Fast scores 80.0% on MMLU-Pro compared to Claude 3 Opus's 68.0%.
Coding: In coding, Grok 4 Fast scores 85.0% on HumanEval+ compared to Claude 3 Opus's 78.0%, while Grok 4 Fast scores 48.0% on SWE-bench Verified compared to Claude 3 Opus's 22.0%, while Grok 4 Fast scores 52.0% on LiveCodeBench compared to Claude 3 Opus's 32.0%.
Math: In math, Grok 4 Fast scores 84.0% on MATH compared to Claude 3 Opus's 68.0%, while Grok 4 Fast scores 94.0% on GSM8K compared to Claude 3 Opus's 88.0%.
Reasoning: In reasoning, Grok 4 Fast scores 60.0% on GPQA Diamond compared to Claude 3 Opus's 59.4%, while Grok 4 Fast scores 38.0% on ARC-AGI compared to Claude 3 Opus's 8.0%.
Context: In context, Grok 4 Fast scores 256K on Context Length compared to Claude 3 Opus's 200K.
Pricing Comparison
Claude 3 Opus costs $15.0/1M input tokens and $75.0/1M output tokens, while Grok 4 Fast costs $0.20/1M input and $0.50/1M output. Grok 4 Fast is the more affordable option for API usage.
Speed Comparison
Claude 3 Opus generates output at 25 tok/s compared to Grok 4 Fast's 110 tok/s, and the time to first token is 800 ms for Claude 3 Opus versus 220 ms for Grok 4 Fast. Grok 4 Fast delivers faster throughput.
Verdict
Grok 4 Fast leads across the board in coding, general intelligence, math, affordability, speed, making it the stronger overall choice in this comparison.
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Claude 3 Opus vs Grok 4 Fast — FAQ
Which is better, Claude 3 Opus or Grok 4 Fast?
Grok 4 Fast wins on more benchmarks overall (14 vs 0). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude 3 Opus compare to Grok 4 Fast for coding?
Grok 4 Fast is better for coding, scoring 48.0% on SWE-bench Verified compared to 22.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude 3 Opus cheaper than Grok 4 Fast?
Yes, Grok 4 Fast is cheaper. Claude 3 Opus costs $15.0/1M input and $75.0/1M output tokens. Grok 4 Fast costs $0.20/1M input and $0.50/1M output tokens.
Which is faster, Claude 3 Opus or Grok 4 Fast?
Grok 4 Fast is faster, generating output at 110 tok/s compared to 25 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Claude 3 Opus vs Grok 4 Fast 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.