How to Fix Claude 504 Gateway Timeout Error

What causes the 504 Gateway Timeout on Claude?

A 504 Gateway Timeout error occurs when one server on the internet does not receive a timely response from an upstream server it needs to access. In the context of Claude (both the claude.ai web application and the Anthropic API), this error indicates that Anthropic's gateway servers or load balancers timed out while waiting for the core model-inference backend to process your request.

This typically happens during periods of extreme traffic, localized backend server failures, or when you submit extremely complex prompts with large context windows that exceed standard execution thresholds. When the backend fails to generate and stream the response within the designated gateway timeout window (usually 60 to 100 seconds), the gateway drops the connection and returns the 504 status code.

How to fix the Claude 504 Gateway Timeout

If you encounter a 504 error, work through these troubleshooting steps to rule out client-side network issues and bypass server-side bottlenecks.

1. Check the official Anthropic status page Before modifying any local settings, verify whether the issue is a widespread outage. * Visit `status.anthropic.com` in your browser. * Look for active incidents labeled "Degraded Performance," "Partial Outage," or "Major Outage." * If the API or Web App nodes show active incidents, local troubleshooting will not resolve the issue. You must wait for Anthropic's infrastructure engineers to resolve the upstream capacity problems.

2. Reduce prompt context and token size Large prompts require significantly more compute time to process. If you are close to the context window limit or have uploaded massive documents, the model might fail to generate a response before the gateway times out. * Break your prompt into smaller, logical segments. * If you uploaded multiple large PDF files, remove them and paste only the highly relevant text segments into the chat box. * For API users, reduce the `max_tokens` parameter in your payload and verify that your system prompts are not causing infinite generation loops.

3. Clear local DNS cache and browser state Your local network routing or corrupted browser session states can cause persistent gateway connection drops. * **Clear Browser Data:** Press `Ctrl + Shift + Delete` (Windows) or `Cmd + Shift + Delete` (Mac) and clear cached files and cookies specifically for `claude.ai`. * **Flush DNS Cache:** Open your terminal or command prompt and run the appropriate command: * **Windows:** `ipconfig /flushdns` * **macOS:** `sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder` * **Linux:** `sudo systemctl restart systemd-resolved`

4. Increase client-side timeouts (For API Users) If you are using the Anthropic SDK or making direct HTTP requests, the default timeout configuration in your code might be too low, causing your local client to abort the connection before the server can respond. * Adjust the connection timeout settings when initializing your Anthropic client. For example, in Python: ```python import anthropic

client = anthropic.Anthropic( timeout=120.0, # Increase timeout to 120 seconds ) ` * If you are routing requests through a reverse proxy (like Nginx or Apache) on your own servers, ensure your proxy_read_timeout and proxy_connect_timeout directives are configured to at least 120 seconds.

5. Shift endpoints or cloud providers If you run business-critical tasks and the primary Anthropic API endpoints consistently return 504 errors, route your requests through an alternative cloud provider that hosts Claude models. * Implement a failover system that redirects API calls to Amazon Bedrock or Google Cloud Vertex AI when the primary Anthropic endpoint fails. * Keep your prompt templates compatible across these providers to ensure seamless failover capability.

When to escalate to Anthropic support

If you are a Claude Pro subscriber or an API customer with a paid tier, and you continue to receive 504 gateway timeout errors for more than 30 minutes while the official status page shows "Operational," escalate the issue.

To file a ticket, navigate to the Anthropic Support Center or use the in-app chat widget. Provide your account email, the specific timestamp of the failure, the model version used (e.g., Claude 3.5 Sonnet), and—if using the API—the unique request_id from the HTTP response headers. This information helps engineers locate the exact node failure in their logs.