What is the difference between GPT-4 and GPT-4o?
GPT-4 (released 2023) and GPT-4o (released May 2024) are two distinct generations of OpenAI's flagship model. Three key differences: (1) **Speed** — GPT-4o is about 2× faster at generation than classic GPT-4, with time-to-first-token cut by 3.
GPT-4 (released 2023) and GPT-4o (released May 2024) are two distinct generations of OpenAI's flagship model. Three key differences:
(1) **Speed** — GPT-4o is about 2× faster at generation than classic GPT-4, with time-to-first-token cut by 3.
(2) **Native multimodality** — GPT-4o handles text, image, audio, and voice natively in one unified model, while GPT-4 required separate models (GPT-4 Vision for images, Whisper for audio).
(3) **Pricing** — GPT-4o costs $2.50/million input tokens and $10 output, about half the price of GPT-4 Turbo. GPT-4o is today the default model on ChatGPT and the OpenAI API. GPT-4 remains available for compatibility but OpenAI recommends migration. In 2026, GPT-5 is announced but not yet broadly rolled out. On Ask Aurel, you access GPT-4o alongside Claude, Gemini, Mistral, Grok, and DeepSeek on pay-as-you-go.