INTRODUCING GPT-5.1 FOR DEVELOPERS

Summary from the TLDR Dev newsletter

OpenAI has released GPT-5.1, a new model in the GPT-5 series designed for agentic and coding tasks that balances intelligence and speed. GPT-5.1 dynamically adjusts its reasoning time based on task complexity, offers a "no reasoning" mode for faster responses on simpler tasks, and includes extended prompt caching for improved efficiency. It introduces new tools like the apply_patch tool for reliable code editing and a shell tool for executing commands.