GPT-5.1 Chat vs xAI: Grok 4
Compare GPT-5.1 Chat by OpenAI against xAI: Grok 4 by xAI, in 2 community votes, gpt-5.1 chat and xai: grok 4 are closely matched, context windows of 128K vs 256K, tested across 52 shared challenges. Updated April 2026.
Which is better, GPT-5.1 Chat or xAI: Grok 4?
GPT-5.1 Chat and xAI: Grok 4 are closely matched based on 2 community votes. GPT-5.1 Chat costs $1.25/M input tokens vs $3/M for xAI: Grok 4. Context windows: 128K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.1 Chat and xAI: Grok 4
GPT-5.1 Chat is made by openai while xAI: Grok 4 is from xai. GPT-5.1 Chat has a 128K token context window compared to xAI: Grok 4's 256K. On pricing, GPT-5.1 Chat costs $1.25/M input tokens vs $3/M for xAI: Grok 4. In community voting, In 2 community votes, GPT-5.1 Chat and xAI: Grok 4 are closely matched.
In 2 community votes, GPT-5.1 Chat and xAI: Grok 4 are closely matched. GPT-5.1 Chat and xAI: Grok 4 perform similarly across challenge categories. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.
Votes are tied. GPT-5.1 Chat is newer and likely incorporates more recent improvements.
Style Comparison
xAI: Grok 4 uses 7.0x more emoji
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