Despite all crises – currently OpenAI is under fire due to the Pentagon deal – the company must deliver on the technical side with everything it has. To that end, OpenAI released GPT-5.3 Instant on Tuesday evening, an update to the most widely used ChatGPT model. The new model is intended to make everyday conversations more fluent and helpful, but shows setbacks in some security areas compared to its predecessor. Until recently, OpenAI had just launched GPT-5.3-Codex to the market, which – as