It has strong reasoning, but it sometimes answers questions you didn't ask. Formatting and image generation lag behind the text quality. It's a new month, and a new AI version number. It's called ...

GPT-5.4 is also more reliable, producing 18% fewer errors and 33% fewer false claims than GPT-5.2, according to OpenAI.

Mr. Litt was a speechwriter for President Barack Obama. Before leaving for the airport to catch my flight to Milan, I bought one full-size American flag, four 8-by-12-inch flags and two backup smaller ...