ChatGPT-4o (March 2025) vs Horizon Beta
Compare ChatGPT-4o (March 2025) by OpenAI against Horizon Beta by OpenRouter, in 5 community votes, horizon beta wins 75% of head-to-head duels, context windows of 128K vs 256K, tested across 21 shared challenges. Updated April 2026.
Which is better, ChatGPT-4o (March 2025) or Horizon Beta?
Horizon Beta is the better choice overall, winning 75% of 5 blind community votes on Rival. ChatGPT-4o (March 2025) costs $5/M input tokens vs $0/M for Horizon Beta. Context windows: 128K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between ChatGPT-4o (March 2025) and Horizon Beta
ChatGPT-4o (March 2025) is made by openai while Horizon Beta is from openrouter. ChatGPT-4o (March 2025) has a 128K token context window compared to Horizon Beta's 256K. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $0/M for Horizon Beta. In community voting, In 5 community votes, Horizon Beta wins 75% of head-to-head duels.
In 5 community votes, Horizon Beta wins 75% of head-to-head duels. Horizon Beta leads in Image Generation. Based on blind community voting from the Rival open dataset of 5+ human preference judgments for this pair.
Pick Horizon Beta. In 5 blind votes, Horizon Beta wins 75% of the time. That's not luck.
Horizon Beta particularly excels in Image Generation.
Style Comparison
ChatGPT-4o (March 2025) uses 329.7x more bold
vs
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
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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.
