Free AI models on OpenRouter are genuinely good. But they come with a catch — 429s, slow responses, models that go offline mid-generation, and no way to know which one is actually 

SDE-2 building EdTech at scale by day, developer tools by night. Core engineer on Lit — an AI-powered EdTech platform

Racing free OpenRouter models in parallel — no 429 waiting, no dead models, no extra cost

How I used Promise.any() to make free AI models reliable enough for production

github

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