Simon Willison’s Weblog

4th January 2026

It genuinely feels to me like GPT-5.2 and Opus 4.5 in November represent an inflection point - one of those moments where the models get incrementally better in a way that tips across an invisible capability line where suddenly a whole bunch of much harder coding problems open up.

Posted 4th January 2026 at 11:21 pm

Recent articles

Qwen 3.8 27B on my laptop can interpret model weights, too - 3rd November 2026
The U.S. Census Bureau and “Super Intelligence” - 2nd November 2026
The October inflection point for vibe game development - 28th October 2026
Battle Drones - a vibe coded RTS with audio-based multiplayer - 20th October 2026

This is a note by Simon Willison, posted on 4th January 2026.

ai 2,308 openai 480 generative-ai 2,048 llms 2,013 ai-assisted-programming 407 anthropic 352 claude 323 claude-4 14 gpt-5 31 november-2025-inflection 16 gpt 135

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