Compare GPT-4o (Omni) by OpenAI against Grok 3 Beta by xAI, in 2 community votes, gpt-4o (omni) and grok 3 beta are closely matched, context windows of 128K vs 131K, tested across 54 shared challenges. Updated April 2026.
GPT-4o (Omni) and Grok 3 Beta are closely matched based on 2 community votes. GPT-4o (Omni) costs $2.5/M input tokens vs $2/M for Grok 3 Beta. Context windows: 128K vs 131K tokens. Compare their real outputs side by side below.
GPT-4o (Omni) is made by openai while Grok 3 Beta is from xai. GPT-4o (Omni) has a 128K token context window compared to Grok 3 Beta's 131K. On pricing, GPT-4o (Omni) costs $2.5/M input tokens vs $2/M for Grok 3 Beta. In community voting, In 2 community votes, GPT-4o (Omni) and Grok 3 Beta are closely matched.
In 2 community votes, GPT-4o (Omni) and Grok 3 Beta are closely matched. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.
Votes are tied. Grok 3 Beta is newer and likely incorporates more recent improvements.
GPT-4o (Omni) uses 2.5x more emoji
Ask 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
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

Compare GPT-4o (Omni) by OpenAI against Grok 3 Beta by xAI, in 2 community votes, gpt-4o (omni) and grok 3 beta are closely matched, context windows of 128K vs 131K, tested across 54 shared challenges. Updated April 2026.
GPT-4o (Omni) and Grok 3 Beta are closely matched based on 2 community votes. GPT-4o (Omni) costs $2.5/M input tokens vs $2/M for Grok 3 Beta. Context windows: 128K vs 131K tokens. Compare their real outputs side by side below.
GPT-4o (Omni) is made by openai while Grok 3 Beta is from xai. GPT-4o (Omni) has a 128K token context window compared to Grok 3 Beta's 131K. On pricing, GPT-4o (Omni) costs $2.5/M input tokens vs $2/M for Grok 3 Beta. In community voting, In 2 community votes, GPT-4o (Omni) and Grok 3 Beta are closely matched.
In 2 community votes, GPT-4o (Omni) and Grok 3 Beta are closely matched. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.
Votes are tied. Grok 3 Beta is newer and likely incorporates more recent improvements.
GPT-4o (Omni) uses 2.5x more emoji
Ask 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
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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49 fights queued
37+ more head-to-head results. Free. Not a trick.
Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy