Simon Willison’s Weblog

Adding a 'bak' comment to your .bash_profile. Quickly create a timestamped backup of a file.

Posted 3rd April 2005 at 11:44 pm

Recent articles

GPT-5: Key characteristics, pricing and model card - 7th August 2025
OpenAI's new open weight (Apache 2) models are really good - 5th August 2025
ChatGPT agent's user-agent - 4th August 2025

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