Claude

Claude Errors & Fixes

Claude errors range from silent response cuts to full API failures. Whether you're using Claude via claude.ai or the Anthropic API, these guides explain exactly why each error happens and the fastest path to resolving it, including plan-specific limitations.

Claude is an AI assistant built by Anthropic, available as Claude 3.5 Sonnet, Claude 3 Opus, and Claude 3 Haiku. It is designed with a focus on safety, helpfulness, and honesty, and is widely used for writing, coding, analysis, and research. Claude is accessible via claude.ai and through the Anthropic API.

8 guides available

Before you start — quick checks

Most Claude errors are resolved by one of these quick steps before opening a full guide:

1.Check Anthropic status at status.anthropic.com
2.Verify your Claude plan has not reached its usage limit
3.Try refreshing the page or starting a new conversation
4.Check if your file upload is within the size and format limits
5.Test the API with a minimal request to isolate the issue

If none of these help, browse the specific guides below or visit Anthropic Support.

All Claude error guides

Claude API Rate Limit Error (529) — How to Fix It

Getting a 529 or rate limit error from the Claude API? Learn how to fix it with exponential backoff, tier upgrades, and batch requests.

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Claude Context Window Exceeded — How to Fix It

Fix the Claude context window exceeded error fast. Learn how to manage the 200k token limit with Projects, summaries, and document chunking.

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Claude Cuts Off Response Mid-Way — How to Fix It

Claude stopping before finishing? Learn how to fix truncated responses in Claude with max_tokens settings, chunking, and prompt strategies.

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Claude File Upload Not Working — Fix Guide

Fix Claude file upload issues fast. Resolve missing upload buttons, failed PDFs, and image errors with these step-by-step solutions.

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Claude Not Available in My Country — How to Fix Regional Blocks

See 'not available in your region' on Claude.ai? Learn how to fix geographic blocks and access Claude from unsupported countries in minutes.

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Claude Not Following Instructions — How to Fix It

Claude ignoring your prompt format or instructions? Learn how to use XML tags, numbered steps, and system prompts to get consistent, accurate output every time.

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Claude Is Currently Overloaded — How to Fix It

Claude showing 'currently overloaded'? Learn 4 fast fixes to restore access, including off-peak timing, model switching, and API alternatives.

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Claude Projects Not Saving Instructions — How to Fix It

Fix Claude Projects not saving custom instructions or knowledge. Step-by-step solutions to make your project settings persist across conversations.

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Frequently asked questions about Claude

What does "context window exceeded" mean in Claude?
Claude processes conversations up to a fixed number of tokens (roughly 200,000 tokens for Claude 3). When a conversation gets too long, Claude can no longer fit it in memory and returns this error. Start a new conversation or summarize previous context to continue working.
Why does Claude stop in the middle of a response?
Claude cuts off responses when it approaches its output token limit per response. For long outputs, ask Claude to continue from where it left off, or break the task into smaller sections.
Why is Claude's API returning a 529 error?
A 529 error means Anthropic's servers are overloaded. This happens during high-demand periods. Implement exponential backoff in your code — wait 5, 10, 20 seconds between retries — rather than hammering the endpoint.
Is Claude available via API?
Yes. Claude is accessible via the Anthropic API at api.anthropic.com. You need an Anthropic API key, which you can generate at console.anthropic.com. Pricing is per million tokens, varying by model.
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