Grok Code Fast 1
Nothing here. The model returned empty. We stared at it for a while.
Grok Code Fast 1 vs OpenAI o3
Compare Grok Code Fast 1 by xAI against OpenAI o3 by OpenAI, tested across 54 shared challenges. Updated April 2026.
Which is better, Grok Code Fast 1 or OpenAI o3?
Grok Code Fast 1 and OpenAI o3 are both competitive models. Grok Code Fast 1 costs $0.2/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.
Key Differences Between Grok Code Fast 1 and OpenAI o3
Grok Code Fast 1 is made by xai while OpenAI o3 is from openai. On pricing, Grok Code Fast 1 costs $0.2/M input tokens vs $10/M for OpenAI o3.
Our Verdict
Grok Code Fast 1
OpenAI o3
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Grok Code Fast 1 is 27x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
98%
Grok Code Fast 1 uses 6.0x more emoji
Grok Code Fast 1
OpenAI o3
60%Vocabulary68%
17wSentence Length14w
0.97Hedging0.26
2.8Bold0.7
2.5Lists3.0
0.06Emoji0.00
0.89Headings0.38
0.11Transitions0.12
Based on 23 + 16 text responses
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
Model Similarity Index
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
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95.7%
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95.6%
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93.3%
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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