Compare ChatGPT-4o (March 2025) by OpenAI against Polaris Alpha by OpenRouter, in 3 community votes, chatgpt-4o (march 2025) wins 100% of head-to-head duels, context windows of 128K vs 256K, tested across 16 shared challenges. Updated April 2026.
ChatGPT-4o (March 2025) is the better choice overall, winning 100% of 3 blind community votes on Rival. ChatGPT-4o (March 2025) costs $5/M input tokens vs $0/M for Polaris Alpha. Context windows: 128K vs 256K tokens. Compare their real outputs side by side below.
ChatGPT-4o (March 2025) is made by openai while Polaris Alpha is from openrouter. ChatGPT-4o (March 2025) has a 128K token context window compared to Polaris Alpha's 256K. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $0/M for Polaris Alpha. In community voting, In 3 community votes, ChatGPT-4o (March 2025) wins 100% of head-to-head duels.
In 3 community votes, ChatGPT-4o (March 2025) wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 3+ human preference judgments for this pair.
Pick ChatGPT-4o (March 2025). In 3 blind votes, ChatGPT-4o (March 2025) wins 100% of the time. That's not luck.
ChatGPT-4o (March 2025) uses 329.7x more bold
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 ChatGPT-4o (March 2025) by OpenAI against Polaris Alpha by OpenRouter, in 3 community votes, chatgpt-4o (march 2025) wins 100% of head-to-head duels, context windows of 128K vs 256K, tested across 16 shared challenges. Updated April 2026.
ChatGPT-4o (March 2025) is the better choice overall, winning 100% of 3 blind community votes on Rival. ChatGPT-4o (March 2025) costs $5/M input tokens vs $0/M for Polaris Alpha. Context windows: 128K vs 256K tokens. Compare their real outputs side by side below.
ChatGPT-4o (March 2025) is made by openai while Polaris Alpha is from openrouter. ChatGPT-4o (March 2025) has a 128K token context window compared to Polaris Alpha's 256K. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $0/M for Polaris Alpha. In community voting, In 3 community votes, ChatGPT-4o (March 2025) wins 100% of head-to-head duels.
In 3 community votes, ChatGPT-4o (March 2025) wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 3+ human preference judgments for this pair.
Pick ChatGPT-4o (March 2025). In 3 blind votes, ChatGPT-4o (March 2025) wins 100% of the time. That's not luck.
ChatGPT-4o (March 2025) uses 329.7x more bold
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.

16 fights queued
4+ more head-to-head results. Free. Not a trick.
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16 fights queued
4+ 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