GPT 5.5 on AI Gateway

Source: Vercel Blog

Overview

GPT‑5.5 is now available on the Vercel AI Gateway. It is tuned for long‑running agentic work across coding, computer use, knowledge work, and scientific research, and is more token‑efficient than the previous generation.

Variants

• GPT‑5.5 – Stronger at agentic coding and long‑horizon tasks that require holding context across a large system and propagating changes through the surrounding codebase. Paired with computer‑use skills, it can operate real software and generate documents, spreadsheets, or slide presentations.
• GPT‑5.5 Pro – Built for demanding, multi‑step work where response quality matters more than latency. Early testing shows gains in business, legal, education, data science, and technical research workflows that involve critiquing work over multiple passes and stress‑testing arguments.

Usage

To use GPT‑5.5, set the model to openai/gpt-5.5 or openai/gpt-5.5-pro in the AI SDK.

import { streamText } from 'ai';

const result = streamText({
  model: 'openai/gpt-5.5', // or 'openai/gpt-5.5-pro'
  prompt: `Migrate our user settings page from REST to the new
           GraphQL schema, update the affected components and tests,
           and open a PR with a summary of the changes.`,
});

AI Gateway Features

• Unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher‑than‑provider uptime.
• Built‑in custom reporting, observability, and Bring Your Own Key support.
• Intelligent provider routing with automatic retries.

Resources

• Learn more about AI Gateway.
• View the AI Gateway model leaderboard.
• Try it in the model playground.