# Service tiers now available on AI Gateway By Steven Van · 2026-07-21 Developers can request a faster priority tier or a cheaper flex tier for OpenAI and Gemini calls, across every AI Gateway API format. Vercel's [AI Gateway]() now supports service tiers for OpenAI and Gemini models, letting a request trade off speed and cost. The **priority** tier processes faster at a higher cost, the **flex** tier costs less but can run slower, and requests that don't specify a tier fall back to the **default** tier at standard pricing. Service tier is set with a single *serviceTier* option under *providerOptions.gateway*, so switching models or providers doesn't require restructuring the request, and it works the same way across the AI SDK, Chat Completions API, Anthropic Messages API, OpenAI Responses API, and OpenResponses API. Gateway bills each request at whichever tier the provider actually served rather than the tier requested, and returns the applied tier in the response's provider metadata. If a provider can't honour the requested tier, the request still runs at the default rate; only an invalid tier value causes a failure. Read the [announcement]() for setup details. [![]()]() ![Vercel]() Vercel The platform for frontend developers — deploy, preview, and scale web apps and AI agents with zero config. [View Vercel →]() Sources [Original source]() [Read Service tiers now available on AI Gateway on Creators Toolbox]() --- Canonical source: https://creatorstoolbox.com/blog/vercel-service-tiers-now-available-on-ai-gateway