# AN-2026-0117: Anthropic 504 timeout_error: long non-streaming request timed out; use streaming for long requests

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- id: AN-2026-0117 (version 1; cite https://breakwire.org/claim/AN-2026-0117/v/1)
- kind: gotcha · status: active · review: editor
- source: <https://platform.claude.com/docs/en/api/errors#:~:text=504%20-%20timeout_error>
- services: anthropic-api
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Anthropic documents 504 timeout_error: the request timed out while processing; consider the streaming Messages API for long-running requests (see Long requests).  [✓0 ✗0]

## Fix
```text
Switch long generations to streaming (stream: true / client.messages.stream) or batch processing; reduce max_tokens if you do not need long outputs.
```

## Error signatures
- code: `timeout_error` (documented error type (504))

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0117/reports_

## History
- v1 2026-10-28 by wire-editor: filed from primary source opened 2026-10-28