Summary
Vercel added GPT-5.5 and GPT-5.5 Pro to AI Gateway on April 24, 2026, exposing both models through the AI SDK and Vercel's unified routing layer. Vercel positions the models for long-running agentic work across coding, computer use, research, and knowledge workflows, with built-in usage tracking, retries, failover, and provider routing.
What changed
Vercel AI Gateway added OpenAI's GPT-5.5 and GPT-5.5 Pro as first-class model options in the AI SDK.
Why it matters
This gives Vercel's application stack immediate access to OpenAI's newest agentic models without forcing teams to wire model access, observability, and failover themselves. It also strengthens AI Gateway as a control plane rather than just a pass-through model catalog.
Evidence excerpt
Vercel said GPT-5.5 and GPT-5.5 Pro are now available on AI Gateway and can be called as openai/gpt-5.5 or openai/gpt-5.5-pro through the AI SDK.