OpenAI launches GPT‑5.4 Thinking and Pro, its ‘most factual and efficient’ model yet

OpenAI has introduced GPT-5.4 Thinking and GPT-5.4 Pro, the newest upgrades to its GPT-5 AI models. The company says the model is more factual and token-efficient, with faster responses, improved research abilities, stronger context retention, better benchmark scores, and lower error rates, alongside new steerability and safety evaluation features.