ChatGPT users report broken thinking and tool use in 5.6 Sol

Multiple ChatGPT Plus users report a suspected regression since September 7: GPT-5.6 Sol in medium/hard thinking modes stops after a few lines, no longer reasoning deeply or calling tools like web search once it starts writing.

2026-09-08 ~ 2026-09-08 · 3 related posts

• ChatGPT 5.6-sol Thinking Mode Suspected Broken for Multiple Users — The-unreliable-one · 2026-09-08
• ChatGPT 5.6 Sol Users Report Thinking and Web Search Suddenly Broken — changescome · 2026-09-08
• ChatGPT stops calling tools mid-answer after text starts — users report regression — Ready8472 · 2026-09-08