GPT-5.5 now available on AI Gateway
GPT-5.5 and GPT-5.5 Pro models are now available through Vercel's AI Gateway. Both variants are optimized for agentic work, long-context coding tasks, and multi-step reasoning workflows with improved token efficiency over the previous generation.
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 across a large system and carry changes through the surrounding codebase. Paired with computer-use skills, it can operate real software and turn raw material into documents, spreadsheets, or slide presentations.
GPT-5.5 Pro is 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.
To use GPT-5.5, set model to or in the .openai/gpt-5.5openai/gpt-5.5-proAI SDK
AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in , , support, and intelligent provider routing with automatic retries.custom reportingobservabilityBring Your Own Key
Learn more about , view the or try it in our .AI GatewayAI Gateway model leaderboardmodel playground
Source: original entry ↗
More from Vercel
Follow Vercel to get its new changes in your feed and email digest.
OpenAI Decisions API now available on AI Gateway
OpenAI's Decisions API is now accessible through Vercel's AI Gateway with an OpenAI-compatible endpoint, enabling decision models to answer typed questions and return probabilities, choices, and scores for routing, triage, and guardrails use cases. Support is available across the OpenAI SDK, AI SDK, HTTP API, and CLI with the latest versions.
Timestamp attributes now supported in Vercel Flags
Vercel Flags now supports timestamp attributes for entities, allowing you to create time-based targeting rules. Use this feature to run limited-time campaigns, show content between specific dates, or target users based on registration date.
Glyph Cluster now available in stealth on AI Gateway
Glyph Cluster, a reasoning model for coding and long-context analysis, is now available as a stealth model on Vercel's AI Gateway for Pro and Enterprise plan teams with purchased AI Gateway credits at no cost during the stealth period. The model supports function calling, streams responses, and can be accessed via AI SDK, OpenAI-compatible APIs, and coding agents.