Every Claude error message about usage limits, resets, and capacity — copied verbatim from Anthropic's own support.claude.com and code.claude.com docs, what each one means, and what to do about it. Login, authentication, message-length and spend-limit errors aren't reset-related and aren't listed here.
Claude capacity constraints: “Due to unexpected capacity constraints”
Claude session limit reached: “You've hit your session limit · resets 3:45pm”
Claude Opus limit reached: “You've hit your Opus limit · resets 3:45pm”
Claude 529 overloaded error: “API Error: Repeated 529 Overloaded errors”
Claude Code API error 429: “API Error: Request rejected (429)”
A warning shown when you're getting close to one of your plan's usage limits — you haven't been blocked yet. Anthropic's help article lists two versions: this one for the five-hour session limit, and "Approaching weekly limit" for the weekly one.
Source: support.claude.com — Troubleshoot Claude error messages
The blocking error shown once you've hit the five-hour session limit. The [time] in the message is when your own five-hour window resets.
Source: support.claude.com — Troubleshoot Claude error messages
Shown instead of a hard block to paid users who have usage credits enabled in Usage settings — work continues, billed at standard API rates, instead of stopping until the reset.
Source: support.claude.com — Troubleshoot Claude error messages
A capacity-constraint message, shown when Claude's infrastructure sees high demand system-wide. Anthropic states this is normal load management, not a technical problem, and is temporary. It will not appear on status.claude.com, because Anthropic doesn't treat it as an incident.
Source: support.claude.com — Troubleshoot Claude error messages
Claude Code's rolling session-usage allowance ran out. Claude Code blocks further requests until the reset time shown in the message. Usage counts against the session and weekly allowances at the same time, so a single burst of heavy activity can exhaust the weekly allowance before the session window resets.
Claude Code's weekly usage allowance ran out. The session and weekly limits are shared across all models, so switching models doesn't restore access. Claude Code blocks further requests until the reset time shown in the message.
A model-family limit — it applies only to requests to the Opus family, unlike the shared session/weekly limits.
A model-family limit — it applies only to requests to the Sonnet family, unlike the shared session/weekly limits.
Shown at the bottom of an interactive session (signed in with a claude.ai subscription) while Claude Code waits in the open session and prepares to continue the interrupted task shortly after the reset.
Source: code.claude.com docs — Interactive mode (Wait for a usage limit to reset)
An early warning Claude Code can show before a usage window runs out, so the block at 100% isn't a surprise.
The API is temporarily at capacity across all users — Claude Code shows this only after it has already retried several times on its own. A 529 is not your usage limit and doesn't count against your quota.
An example of the model-switch prompt Claude Code shows when one specific model is under particularly high load — part of the same 529/capacity handling as above, not a separate usage-limit error.
A short-lived, server-side throttle unrelated to your plan quota. Claude Code tells it apart from a real plan-limit response by the absence of the unified quota headers a real limit response carries.
You've hit the rate limit configured for your API key, Amazon Bedrock project, or Google Cloud project — a provider/gateway-side rate limit, not the account usage limit this site tracks.
Hit a limit right now? Check your Claude Code usage, see the reset forecast, or read what's known about a banked reset.
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