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Fact◆Article

GPT-5.6 Sol wrote the entire llm-chat-completions-server plugin, demonstrating thorough knowledge of the OpenAI Chat Completions API specification.

The entire plugin was written by GPT-5.6 Sol, an AI model that has strong knowledge of the OpenAI Chat Completions API shape. ✦ AI generated

Author · Simon Willison's Weblog · 2026-07-30 · original ↗

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GPT-5.6 Sol wrote the whole thing - it turns out it knows the OpenAI Chat Completions API shape really well.

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▦ OpenAI ✳ GPT-5.6 Sol

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