GPT 5.5 on AI Gateway (opens in new tab)

# GPT 5\.5 on AI Gateway **Published:** April 24, 2026 | **Authors:** Walter Korman, Rohan Taneja, Jerilyn Zheng --- GPT-5.5 is now available on Vercel AI Gateway. There are 2 variants: GPT-5.5 and GPT-5.5 Pro. Both models are tuned for long-running agentic work across coding, computer use, knowledge work, and scientific research, and are more token-efficient than the previous generation. GPT-5.5 is stronger at agentic coding and long-horizon work where the model needs to hold context ac...