Andromeda Alpha vs Claude Sonnet 4.5
Compare Andromeda Alpha by OpenRouter against Claude Sonnet 4.5 by Anthropic, context windows of 128K vs 200K, tested across 24 shared challenges. Updated April 2026.
Which is better, Andromeda Alpha or Claude Sonnet 4.5?
Andromeda Alpha and Claude Sonnet 4.5 are both competitive models. Andromeda Alpha costs $0/M input tokens vs $3/M for Claude Sonnet 4.5. Context windows: 128K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between Andromeda Alpha and Claude Sonnet 4.5
Andromeda Alpha is made by openrouter while Claude Sonnet 4.5 is from anthropic. Andromeda Alpha has a 128K token context window compared to Claude Sonnet 4.5's 200K. On pricing, Andromeda Alpha costs $0/M input tokens vs $3/M for Claude Sonnet 4.5.
No community votes yet. On paper, Claude Sonnet 4.5 has the edge — bigger model tier, bigger context window, major provider backing.
Style Comparison
Claude Sonnet 4.5 uses 6.1x more sentence length
vsAsk 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.
