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Fix incorrect HTTP status returned when Anthropic API SSE stream breaks mid-response, causing client-side parsing failures Includes evidence for Anthropic API troubleshooting demand.
SSE stream error returns HTTP 200 instead of actual error code during mid-stream interruption Fix 400 error when creating Claude agent via Managed Agents beta API despite same API key working with Messages API Includes evidence for Anthropic API troubleshooting demand.
Error code: 400 - {"type": "invalid_request_error", "message": "`model.id`: model \"claude-sonnet-4-6\": model is not supported"} Understand and fix structured output grammar size limit error when using complex schemas with Claude API Includes evidence for Anthropic API troubleshooting demand.
compiled grammar is too large — Structured output validation fails for complex Pydantic schemas with Claude Investigate why prompt cache shows ~40% miss rate even for consecutive identical API calls with Anthropic Messages API Includes evidence for Anthropic API troubleshooting demand.
Cache misses on second back-to-back client.messages.create() (~40% rate) — Prompt caching efficiency drops significantly on consecutive identical calls Fix prompt caching not being applied on Claude Opus 4.5 and Haiku 4.5 models despite cache_control parameter set Includes evidence for Anthropic API troubleshooting demand.
prompt_caching not activated on new model families (Opus 4.5/Haiku 4.5) — Cache control header ignored, costing more tokens than expected Developers using Anthropic Python SDK receive incorrect HTTP 200 status for streaming errors (overloaded, rate-limited), preventing proper error handling in production applications. Includes evidence for Anthropic API troubleshooting demand.
APIStatusError with status_code=200 when API sends SSE error event like overloaded_error or rate_limit_error mid-stream Developers using Anthropic API through Vertex AI backend experience spurious 413 errors claiming 32MB limit exceeded on small ~2MB requests. May indicate a Vertex AI configuration bug or payload encoding issue. Includes evidence for Anthropic API troubleshooting demand.
413 Request exceeds the maximum allowed number of bytes. The maximum request size is 32 MB — when actual request size is only ~2MB via Vertex AI Producers using AsyncAnthropicBedrock cross-region inference profiles intermittently crash on first streaming event when Bedrock returns rate limit error as an SSE event stream; accessing event.message.model raises AttributeError. Includes evidence for Anthropic API troubleshooting demand.
AttributeError: 'NoneType' object has no attribute 'model' — first SSE frame is type=error rate_limit_error, but SDK yields BetaRawMessageStartEvent with message=None Developer sends ~2MB document payload to Claude Sonnet 4 via Vertex AI and gets 413 error despite being well under the documented 32MB limit — debugging difficult because error misreports the cause Includes evidence for Anthropic API troubleshooting demand.
Error code: 413 - Request exceeds the maximum allowed number of bytes. The maximum request size is 32 MB (but payloads of ~2MB are rejected) Understand why max_retries doesn't prevent overloaded_error interruptions during streaming with ChatAnthropic in LangChain, and find workaround patterns Includes evidence for Anthropic API troubleshooting demand.
anthropic.APIStatusError: {'type': 'error', 'error': {'details': None, 'type': 'overloaded_error', 'message': 'Overloaded'}} during streaming Fix incorrect status code for streaming errors in Anthropic Python SDK so retry/fallback logic based on status_code works correctly Includes evidence for Anthropic API troubleshooting demand.
APIStatusError with status_code=200 when Anthropic API returns overloaded_error / rate_limit_error during streaming (SSE event) Enterprise Anthropic API users want proactive notifications before hitting usage limits to prevent service interruption during production workloads Includes evidence for Anthropic API troubleshooting demand.
Pre-limit usage alerts and webhooks — notify users before session/weekly budgets are exhausted Fix billing interface ambiguity where API pay-per-use charges appear indistinguishable from subscription overage fees — prevents accurate cost attribution for teams using both pricing models simultaneously Includes evidence for Anthropic API troubleshooting demand.
Billing console conflates API direct charges with subscription overages — users cannot distinguish charge sources Fix Python SDK crash when receiving malformed SSE error events during streaming — developers calling Anthropic API via streaming get unhandled AttributeError Includes evidence for Anthropic API troubleshooting demand.
AttributeError: 'NoneType' object has no attribute errors Distinguish between Anthropic 429 rate-limit errors and 529 overloaded_server errors to implement correct retry/backoff strategies for production LLM applications Includes evidence for Anthropic API troubleshooting demand.
HTTP 529 overloaded_error fires when Anthropic capacity is saturated regardless of tier; distinct from 429 rate limit — all three dimensions (RPM, ITPM, OTPM) must be tracked separately 用户在使用 Claude Haiku 4.5 时遭遇大量请求失败（5xx/timeout），需要了解是否计划内故障以及如何降级或重试 Includes evidence for Anthropic API troubleshooting demand.
Elevated error rates on Claude Haiku 4.5 model requests Anthropic API 用户在模型不可用（过载、维护期间）时收到错误，需要了解恢复时间和规避策略 Includes evidence for Anthropic API troubleshooting demand.
overloaded_error / model unavailable / maintenance mode Fix handling of Anthropic API overloaded_error (429) responses when making multiple concurrent requests through SDK or proxy Includes evidence for Anthropic API troubleshooting demand.
overloaded_error: We're experiencing high demand — please retry after X seconds Fix crash when Bedrock returns rate_limit_error inside streaming SSE response — SDK raises unhandled AttributeError instead of typed rate limit exception Includes evidence for Anthropic API troubleshooting demand.
AttributeError: 'NoneType' object has no attribute 'model' / 'usage' — Bedrock cross-region inference SSE error payload returned as BetaRawMessageStartEvent with None message field Fix SDK crashing when AWS Bedrock cross-region inference profile returns HTTP 200 with rate_limit_error SSE payload, causing AttributeError on event.message access during AsyncAnthropicBedrock streaming Includes evidence for Anthropic API troubleshooting demand.
AttributeError: 'NoneType' object has no attribute 'model' — Bedrock returns rate_limit_error SSE causing SDK crash on first streaming event