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.
WebFX reports OpenAI's launch of ChatGPT Apps and SDK enables seamless user interactions and providing developers tools to reach 800M users.
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