What causes the OpenClaw 429 fallback bug?

A 429 from the primary model like GPT poisons the error context, making secondary providers like DeepSeek fail without trying—same hash, instant cooldown.

How do I test if my OpenClaw fallback chain is broken?

Configure GPT, DeepSeek, Gemini. Rate-limit GPT to 429. Check if DeepSeek errors identically without a real call. If yes, broken.

Can I fix OpenClaw fallback chain errors myself?

Yes—modify eval to clear error state per provider hop. Or wait for official patch on #62672. Use single providers short-term.

🤖 AI Dev Tools

The 429 Error That's Secretly Killing Your AI Fallback Chains

Imagine your AI agent hitting OpenAI's rate limit, then your backup models mysteriously failing too—with the exact same error. This OpenClaw bug turns fallbacks into fall-throughs, leaving devs scrambling.

DevTools Feed Apr 07, 2026 3 min read

Diagram of poisoned fallback chain in OpenClaw with 429 error propagating from GPT to DeepSeek

⚡ Key Takeaways

OpenClaw's fallback chains inherit errors across providers, turning 429s into chain-wide failures. 𝕏
Second providers like DeepSeek never get called; only the third survives by luck. 𝕏
Demand fresh eval contexts per provider—shared state kills multi-LLM resilience. 𝕏

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#429 rate limit #AI agents #API errors #LLM routing #OpenClaw #fallback chains #rate limit bugs #rate limits

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Originally reported by dev.to

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