Claude 3 Opus vs Grok 4.1 Fast
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Grok 4.1 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 4.1 Fast scores 1482 on Chatbot Arena ELO compared to Claude 3 Opus's 1240, while Grok 4.1 Fast scores 87.0% on MMLU-Pro compared to Claude 3 Opus's 68.0%.
Coding: In coding, Grok 4.1 Fast scores 88.0% on HumanEval+ compared to Claude 3 Opus's 78.0%, while Grok 4.1 Fast scores 60.0% on SWE-bench Verified compared to Claude 3 Opus's 22.0%, while Grok 4.1 Fast scores 62.0% on LiveCodeBench compared to Claude 3 Opus's 32.0%.
Math: In math, Grok 4.1 Fast scores 89.0% on MATH compared to Claude 3 Opus's 68.0%, while Grok 4.1 Fast scores 96.0% on GSM8K compared to Claude 3 Opus's 88.0%.
Reasoning: In reasoning, Grok 4.1 Fast scores 72.0% on GPQA Diamond compared to Claude 3 Opus's 59.4%, while Grok 4.1 Fast scores 48.0% on ARC-AGI compared to Claude 3 Opus's 8.0%.
Context: In context, Grok 4.1 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 4.1 Fast costs $0.20/1M input and $0.50/1M output. Grok 4.1 Fast is the more affordable option for API usage.
Speed Comparison
Claude 3 Opus generates output at 25 tok/s compared to Grok 4.1 Fast's 120 tok/s, and the time to first token is 800 ms for Claude 3 Opus versus 200 ms for Grok 4.1 Fast. Grok 4.1 Fast delivers faster throughput.
Verdict
Grok 4.1 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 4.1 Fast — FAQ
Which is better, Claude 3 Opus or Grok 4.1 Fast?
Grok 4.1 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 4.1 Fast for coding?
Grok 4.1 Fast is better for coding, scoring 60.0% 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 4.1 Fast?
Yes, Grok 4.1 Fast is cheaper. Claude 3 Opus costs $15.0/1M input and $75.0/1M output tokens. Grok 4.1 Fast costs $0.20/1M input and $0.50/1M output tokens.
Which is faster, Claude 3 Opus or Grok 4.1 Fast?
Grok 4.1 Fast is faster, generating output at 120 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 4.1 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.