GPT-5 vs Grok Code Fast 1
Compare GPT-5 by OpenAI against Grok Code Fast 1 by xAI, in 175 community votes, gpt-5 wins 78% of head-to-head duels, context windows of 400K vs 256K, tested across 52 shared challenges. Updated April 2026.
Which is better, GPT-5 or Grok Code Fast 1?
GPT-5 is the better choice overall, winning 78% of 175 blind community votes on Rival. GPT-5 costs $1.25/M input tokens vs $0.2/M for Grok Code Fast 1. Context windows: 400K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5 and Grok Code Fast 1
GPT-5 is made by openai while Grok Code Fast 1 is from xai. GPT-5 has a 400K token context window compared to Grok Code Fast 1's 256K. On pricing, GPT-5 costs $1.25/M input tokens vs $0.2/M for Grok Code Fast 1. In community voting, In 175 community votes, GPT-5 wins 78% of head-to-head duels.
In 175 community votes, GPT-5 wins 78% of head-to-head duels. GPT-5 leads in Reasoning, Image Generation, Web Design, while Grok Code Fast 1 leads in Conversation, Analysis. Based on blind community voting from the Rival open dataset of 175+ human preference judgments for this pair.
Pick GPT-5. In 175 blind votes, GPT-5 wins 78% of the time. That's not luck.
Pick GPT-5 for Image Generation, Web Design, Reasoning. Pick Grok Code Fast 1 for Conversation, Analysis. Grok Code Fast 1 is 6.7x cheaper per token — worth considering if cost matters.
Style Comparison
Grok Code Fast 1 uses 6.0x more emoji
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
The right persona beats the bigger model. Sometimes.
52 system prompts. 156 generations. One small model, on purpose.
+1.49
composite-score lift from empty prompt to best persona
52
personas
156
responses
3
blind judges
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
