GPT-5.1-Codex-Mini vs Grok Code Fast 1
Compare GPT-5.1-Codex-Mini by OpenAI against Grok Code Fast 1 by xAI, in 3 community votes, gpt-5.1-codex-mini and grok code fast 1 are closely matched, context windows of 400K vs 256K, tested across 55 shared challenges. Updated April 2026.
Which is better, GPT-5.1-Codex-Mini or Grok Code Fast 1?
GPT-5.1-Codex-Mini and Grok Code Fast 1 are closely matched based on 3 community votes. GPT-5.1-Codex-Mini costs $1.5/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-5.1-Codex-Mini and Grok Code Fast 1
GPT-5.1-Codex-Mini is made by openai while Grok Code Fast 1 is from xai. GPT-5.1-Codex-Mini has a 400K token context window compared to Grok Code Fast 1's 256K. On pricing, GPT-5.1-Codex-Mini costs $1.5/M input tokens vs $0.2/M for Grok Code Fast 1. In community voting, In 3 community votes, GPT-5.1-Codex-Mini and Grok Code Fast 1 are closely matched.
In 3 community votes, GPT-5.1-Codex-Mini and Grok Code Fast 1 are closely matched. Based on blind community voting from the Rival open dataset of 3+ human preference judgments for this pair.
Votes are tied. GPT-5.1-Codex-Mini is newer and likely incorporates more recent improvements.
Grok Code Fast 1 is 4.0x cheaper per token — worth considering if cost matters.
Style Comparison
Grok Code Fast 1 uses 6.0x more emoji
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