Compare Andromeda Alpha by OpenRouter against ChatGPT-4o (March 2025) by OpenAI, context windows of 128K vs 128K, tested across 15 shared challenges. Updated April 2026.
Andromeda Alpha and ChatGPT-4o (March 2025) are both competitive models. Andromeda Alpha costs $0/M input tokens vs $5/M for ChatGPT-4o (March 2025). Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.
Andromeda Alpha is made by openrouter while ChatGPT-4o (March 2025) is from openai. Andromeda Alpha has a 128K token context window compared to ChatGPT-4o (March 2025)'s 128K. On pricing, Andromeda Alpha costs $0/M input tokens vs $5/M for ChatGPT-4o (March 2025).
No community votes yet. On paper, ChatGPT-4o (March 2025) has the edge — bigger model tier, major provider backing.
Andromeda Alpha uses 2.5x more transitions
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 Andromeda Alpha by OpenRouter against ChatGPT-4o (March 2025) by OpenAI, context windows of 128K vs 128K, tested across 15 shared challenges. Updated April 2026.
Andromeda Alpha and ChatGPT-4o (March 2025) are both competitive models. Andromeda Alpha costs $0/M input tokens vs $5/M for ChatGPT-4o (March 2025). Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.
Andromeda Alpha is made by openrouter while ChatGPT-4o (March 2025) is from openai. Andromeda Alpha has a 128K token context window compared to ChatGPT-4o (March 2025)'s 128K. On pricing, Andromeda Alpha costs $0/M input tokens vs $5/M for ChatGPT-4o (March 2025).
No community votes yet. On paper, ChatGPT-4o (March 2025) has the edge — bigger model tier, major provider backing.
Andromeda Alpha uses 2.5x more transitions
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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15 fights queued
3+ 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