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).

OpenAI integrates Excel support and live financial data into ChatGPT, creating a powerful spreadsheet co-pilot for traders, analysts, and crypto investors.

Excel table formulas shift from cell positions to named columns with #All-style tags, keeping calculations readable when layouts change.

In a post on X (formerly known as Twitter), the AI giant announced that the Codex app is now available on Windows, adding, “Get the full Codex app experience on Windows with a native agent sandbox and ...