GPT-5.4 Thinking adds deeper reasoning and workflow abilities to ChatGPT while GPT-5.3 Instant remains the fast default for everyday use.
ChatGPT just got another brain boost with GPT-5.4 Thinking — and it’s built for bigger, more complex tasks
GPT-5.4 Thinking adds deeper reasoning and workflow abilities to ChatGPT while GPT-5.3 Instant remains the fast default for everyday use.
