OpenAI is rolling out GPT-5.5 in Codex, with a 400K context window and higher coding benchmark scores than GPT-5.4.

The new model ‘excels’ at tasks like writing and debugging code and doing work across different tools.

VS Code 1.117 adds bring-your-own model key support for Copilot Business and Enterprise users and introduces a set of chat, agent, terminal, and TypeScript updates.

If you thought grep was powerful, wait until you get a hold of ast-grep, which takes it to a whole new level.