如何处理 Claude 529 过载错误
OpenRouter 表示，Claude 的 529 overloaded_error 意味着 Anthropic API 暂时没有足够容量处理所请求的模型，并非用户的密钥、套餐或请求有误。建议先使用指数退避和随机间隔重试，再将同一 Claude 模型转至其他服务商；Anthropic SDK 与 Claude Code 已支持此类重试。由于无法按需触发真实过载，OpenRouter 的过载示例使用了本地 API 替身。
使用 Claude Code 或 API 应用的开发者需要区分容量造成的 529 错误与自身用量造成的 429 错误，并可采用 OpenRouter 说明的重试、供应商故障转移和模型回退方案。
Claude 529 Overloaded: What It Means and How to Fix It
OpenRouter ·10/28/2026
A 529 overloaded_error from Claude means Anthropic’s API is temporarily out of capacity for the model you asked for. Your key, plan and request are fine, and the same request usually goes through a few seconds later. To keep an app working through it, retry with backoff first, then send the request to another provider that serves the same Claude model.
Most people hit this error in Claude Code, where a session stops with API Error: Repeated 529 Overloaded errors. We simulated the overload in the retry example with a local stand-in for the API, because a real one can’t be triggered on demand. Every OpenRouter request in the guide is real.
#Anthropic#OpenRouter#Claude Code#Claude Sonnet 5.5#Claude Opus 5.5#Claude Haiku 5.5#Amazon Bedrock#Google Vertex AI#Microsoft Azure