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).

ChatGPT is now using its 5.4 Thinking model for deeper reasoning, and it's even better at handling "professional work." ...

Office Scripts extract Excel hyperlink URLs without macros; results are hardcoded so the file can stay .xlsx, reuse is straightforward.

MarketXLS is an early investment research platform to support MCP for Excel-based financial workflows, helping professionals generate complete Excel analysis workbooks faster than ever.

Zero-day exploits, AI-driven Android malware, firmware backdoors, password manager trust gaps, rising DDoS define this week’s critical cyber threats.