Dev.to tutorial Tutorials 8h ago 1 views

The API Said "Model Not Found." The Model Existed. The Bug Was a Query String.

by lujianfu2008

Wiring a DeepSeek gateway into a Claude Agent SDK app broke with a misleading "model does not exist" error. The real causes: a ?beta=true query param, and an unmerged assistant message.

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Anthropic API

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Devto Id
5005451
Comments Count
1
Reading Time Minutes
5

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