GPT 5.4 is now on AI Gateway
GPT-5.4 is now live on AI Gateway. Faster, more token-efficient, built for multi-step agentic workflows.
Why it matters
Vercel's AI Gateway expands model access to GPT-5.4, making OpenAI's latest reasoning and agentic capabilities available to developers via unified API with cost tracking and provider routing—lowering friction for production AI app deployment.
The key facts
6 to knowGPT-5.4 and GPT-5.4 Pro now available on Vercel AI Gateway
Improved token efficiency vs. GPT-5.2
Enhanced reasoning and agentic capabilities from GPT-5.3-Codex
Supports multi-step workflows with tools, research, and multi-source data pulls
AI Gateway includes observability, BYOK support, intelligent provider routing, automatic retries
Model leaderboard and playground available for testing
Go to the source
Vercel Blogvercel.com
Publisher excerpt: GPT-5.4 and GPT-5.4 Pro are now available on AI Gateway. This model brings the agentic and reasoning leaps from GPT-5.3-Codex to all domains. This includes knowledge work like reports, spreadsheets, presentations, and analysis in addition to coding. It handles complex multi-step workflows more…