OpenAI has rolled out GPT-5.4 (Thinking) and GPT-5.4 Pro across ChatGPT, its API and Codex, introducing improvements in reasoning, coding and agent-driven workflows for complex professional tasks

ChatGPT 5.4 model: OpenAI has introduced a new artificial intelligence model called GPT-5.4, which is now available in ChatGPT, the company’s API, and its coding tool Codex.

OpenAI has introduced GPT-5.4, the latest upgrade powering ChatGPT with a new “Thinking Mode,” better reasoning, and integrations with Microsoft Excel and Google Sheets. The update aims to improve step-by-step problem solving,

The biggest mistake people make when trying to get their ChatGPT API key is that they use the wrong URL. The key can't be found at chatgpt.com. Instead, point your browser to the OpenAI developer platform. With the correct URL in hand, generating an OpenAI ...

When DeepSeek released its DeepSeek reasoning model in early 2025, it tanked the US stock market. The Chinese startup showed a new way of training frontier AI that didn't rely on access to expensive, high-end hardware. DeepSeek used software to make up for ...