The big headlines on this release are efficiency, with OpenAI reporting that GPT-5.4 uses far fewer tokens (47% fewer on some tasks) than its predecessors).
Latest VS Code update introduces prepackaged bundles of chat customizations that can include skills, commands, agents, MCP servers, and hooks.
It's more than just a code editor.
Uncover the hidden world of streaming and what these services don't want you to know.