Error reference changederrors
Nearest release: v2.1.309, published 6 hours before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Upstream edited this page at 23 Oct 2026 02:37 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 23 Oct 2026 03:07 UTC.
Upstream edited
Recorded here
Lines+7added
Lines−3removed
From line
445
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits193to this page, all time
The whole hunk
from line 445, old and new numbered
/
This page is larger than the 256 KiB this site keeps, so one side of the diff below stops where the stored text does.
from line 445
445445* Dropped connections. When a connection drops partway through a request before Claude has completed any part of its response, including its thinking, Claude Code re-issues the request with the same backoff and the turn continues, even if some text had already started streaming. When it drops after Claude has finished thinking but before it has started any text or tool call, Claude Code instead re-issues the request up to two times in quick succession, and ends the turn with `Connection lost before a response was produced` if the connection keeps dropping at that point.
446446* A connection that Claude Code detects was broken by your computer going to sleep partway through a request. Claude Code counts it as a dropped connection under the rules above; once the retry label names the specific reason, it reads `Connection lost while your computer was asleep`, and if the turn ends after Claude has finished thinking but before any text or tool call, the message reads `Your computer went to sleep before a response was produced`.
447447* A stalled response stream, when the response headers have arrived but none of Claude's response has arrived, or when Claude has finished thinking but hasn't started any text or tool call: Claude Code aborts the stalled connection and streams the request again at most once. If the response stalls a second time after Claude has finished thinking but before any text or tool call, Claude Code ends the turn with `The response stalled before a response was produced`.
448* A streaming request the API never answers with response headers, on a connection where the [first-byte deadline runs](/docs/en/network-config.md#streaming-idle-watchdogs): Claude Code aborts it at the deadline and re-sends it at most once per model request, within the retry budget, then ends the turn with [No response from API](#no-response-from-api) if that attempt goes unanswered too. When you set `CLAUDE_CODE_RETRY_WATCHDOG`, the one-retry cap doesn't apply.
448* A streaming request the API never answers with response headers, on a connection where the [first-byte deadline runs](/docs/en/network-config.md#streaming-idle-watchdogs). At the deadline, Claude Code aborts the request and re-sends it within the retry budget. If the deadline fires for a re-send too, the turn ends with [No response from API](#no-response-from-api). When you set `CLAUDE_CODE_RETRY_WATCHDOG`, Claude Code keeps re-sending within the budget instead.
449449* A streaming response that the API's output content filter stops before Claude has either finished thinking or started any text or tool call. Claude Code re-sends the request once, within the retry budget, and shows [Output blocked by content filtering policy](#output-blocked-by-content-filtering-policy) if the filter stops the second response too.
450450* Temporary 429 throttles, but not a gateway's spend-limit `429`, which isn't a throttle; see [Spend limit reached](#spend-limit-reached).
451451 * When you're signed in with a claude.ai subscription, this includes 429 throttles that don't carry your plan's quota headers. Before v2.1.199, Claude Code retried those throttles only for API key and Enterprise sign-ins.
from line 563
563563
564564### No response from API
565565
566Claude Code sent a streaming request and the API returned no response headers within the deadline for the first byte, so Claude Code aborted the request instead of waiting for the full `API_TIMEOUT_MS` request timeout, 10 minutes by default. Claude Code sends the request again at most once, if the [retry budget](#tune-retry-behavior) allows. When the retry goes unanswered too, the turn ends with this message, which shows how long each attempt waited. When you set [`CLAUDE_CODE_RETRY_WATCHDOG`](/docs/en/env-vars), the one-retry cap doesn't apply and Claude Code retries under the budget described in [Tune retry behavior](#tune-retry-behavior).
566Claude Code sent a streaming request, and the API returned no response headers within the deadline for the first byte. Claude Code aborts such a request rather than wait for the full `API_TIMEOUT_MS` request timeout, and sends it again if the [retry budget](#tune-retry-behavior) allows. When the deadline passes for the retry too, the turn ends with this message, which shows how long each attempt waited.
567567
568If you set [`CLAUDE_CODE_RETRY_WATCHDOG`](/docs/en/env-vars), Claude Code keeps retrying under the budget described in [Tune retry behavior](#tune-retry-behavior) instead of ending the turn.
569
568570```text theme={null}
569571API Error: No response from API (waited 3m, then 10m on the retry). If a proxy or gateway on your network holds responses until they complete, raise API_TIMEOUT_MS or CLAUDE_STREAM_FIRST_BYTE_TIMEOUT_MS to wait longer.
570572```
from line 580
578580
579581Neither wait exceeds one second less than a positive `API_TIMEOUT_MS`, and a positive `API_TIMEOUT_MS` under 11 seconds turns the deadline off. The byte-level watchdog starts only once the response headers arrive, so a response that stops sending bytes after that follows the [stalled-stream rules](#automatic-retries) instead of this deadline.
580582
583In a [Claude apps gateway](/docs/en/claude-apps-gateway) session, this deadline runs only when you [turn it on](/docs/en/claude-apps-gateway-deploy.md#retry-an-unanswered-request-sooner-with-the-first-byte-deadline) by setting `CLAUDE_STREAM_FIRST_BYTE_TIMEOUT_MS` to `1` or more.
584
581585**What to do:**
582586
583587* Send your message again. Your original message is still in the conversation, so for a long prompt you can type `try again` instead of pasting the whole thing.
from line 589
585589* If a proxy or gateway on your network holds responses until they complete, raise `API_TIMEOUT_MS` so the retry waits longer. On Amazon Bedrock, raise `CLAUDE_STREAM_FIRST_BYTE_TIMEOUT_MS` as well.
586590* If the first attempt keeps timing out and the retry then succeeds, raise `CLAUDE_STREAM_FIRST_BYTE_TIMEOUT_MS` so the first attempt waits long enough too.
587591
588Before v2.1.242, Claude Code waited for the full `API_TIMEOUT_MS` request timeout, 10 minutes by default, before failing an unanswered streaming request. Before v2.1.261, the retry waited the same deadline as the first attempt and the message showed no durations.
592Before v2.1.242, Claude Code waited for the full `API_TIMEOUT_MS` request timeout, 10 minutes by default, before failing an unanswered streaming request. Before v2.1.261, the retry waited the same deadline as the first attempt and the message showed no durations. Before v2.1.307, Claude Code ignored `CLAUDE_STREAM_FIRST_BYTE_TIMEOUT_MS` in a Claude apps gateway session.
589593
590594### The response above may be incomplete
591595
from line 2620
26162620
26172621Update that binary, then start a new session. Where the binary came from decides how, except in a [self-hosted environment](/docs/en/self-hosted-environments-deploy.md#pin-the-version):
26182622
2619| The binary that made the request | How to update it |
2620| :- | :- |
2621| A Claude Code you installed | Run `claude update` |
2622| The Claude desktop app | Update the app |
2623| The binary the [VS Code extension](/docs/en/vs-code.md) bundles | Update the extension |
2624| The binary an Agent SDK package bundles | [Upgrade the SDK package](/docs/en/agent-sdk/hosting.md#
2623| The binary tha
No line in this hunk matches that.