Prevent Script Timeouts Using Claude’s Code Execution Disclosure
Optimize Python scripts for Claude's 90-second execution limit.
When using Claude's code execution features, prompt the model to budget its logic within the 90-second per-cell time limit to prevent execution errors.
The Scenario
You are using Claude's Analysis Tool to process a large CSV file and generate complex visualizations. You need to ensure the script doesn't hit the execution timeout.
Before & after
A developer might run a complex script that hangs or times out after 2 minutes, requiring them to manually debug and rewrite the code in smaller chunks, costing 20–30 minutes of frustration.
By explicitly mentioning the 90-second limit in your prompt, Claude budgets its logic to avoid timeouts, completing the task in 2 minutes.
The Prompt
Write and execute a Python script to [DESCRIBE_DATA_TASK]. Note that you have a 90-second execution limit per cell; please ensure the code is optimized and, if necessary, break the processing into sequential steps. [PASTE_DATA_SAMPLE]
The new 'code_execution_20260521' update discloses a 90-second execution limit per cell. When asking Claude to write and run code for data analysis, you should remind it of this limit so it writes efficient, modular code that won't time out.
Source
Claude Platform - Claude API Docs"The code execution tool now supports code_execution_20260521, which discloses the 90-second per-cell execution time limit."