Simon Willison’s Weblog

Sparklines in data URIs in Python. A neat hack with data: URIs and the Python Imaging Library.

Posted 26th April 2005 at 10:54 am

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The Summer of Johann: prompt injections as far as the eye can see - 15th August 2025
Open weight LLMs exhibit inconsistent performance across providers - 15th August 2025
LLM 0.27, the annotated release notes: GPT-5 and improved tool calling - 11th August 2025

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