Russell Brandom / TechCrunch:
GPT-5.4 is available in Pro and Thinking versions; its API version has improved tool calling and will be available with context windows of up to 1M tokens — On Thursday, OpenAI released a GPT-5.4, a new foundation model billed as “our most capable and efficient frontier model for professional work.”
from Techmeme https://ift.tt/9bQKtqh