OpenAI appears to be gearing up for a GPT-5.5 launch, with a cryptic "NS41" post on X that fans quickly decoded. The Base64-encoded string reveals "5.5" when translated, pointing to the next ChatGPT upgrade. Another interpretation maps N=14 and S=19, with calculations yielding the same result.

The teaser arrives amid a flurry of product activity from the company. Last week, OpenAI overhauled Codex for Mac with enhanced computer use capabilities that go beyond traditional agentic coding. This week brought the release of ChatGPT Images 2, featuring notably improved quality for image generation.

The timing suggests OpenAI wants to maintain momentum heading into summer. A mid-cycle model refresh would follow their typical release cadence, and the company has been rolling out updates across multiple products—code generation, image creation, and now the next language model iteration—all within a tight window.