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Free-tier LLM APIs kept returning 429s in my multi-agent app, so I built a multi-provider fallback. Here’s what I learned.

I’ve been building a multi-agent debate app with LangGraph (two agents argue a topic, a judge agent gives a verdict). The biggest problem wasn’t the agent logic, it was reliability on free-tier APIs. What went wrong: Groq, Gemini and OpenRouter each have different rate limits and fail in different…

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Timeline · 2 reports

  1. 2026-10-11 10:24 · r/learnmachinelearning
    Free-tier LLM APIs kept returning 429s in my multi-agent app, so I built a multi-provider fallback. Here’s what I learned.
  2. 2026-10-11 10:18 · r/deeplearning
    Free-tier LLM APIs kept returning 429s in my multi-agent app, so I built a multi-provider fallback. Here’s what I learned.

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