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OpenRouter vs Vercel AI Gateway (2026): Fees, BYOK and Free Tier Compared

By Hisham · Published · Facts as of Oct 30, 2026, each linked to its source.

OpenRouter and Vercel AI Gateway are both hosted gateways that charge inference at the provider's list price from a prepaid balance. They differ in where the fee sits, how BYOK works, and what the free tier covers. Vercel AI Gateway does not require your app to run on Vercel.

Each row below links the page it came from, checked on the date shown.

OpenRouter vs Vercel AI Gateway at a glance

As of Oct 30, 2026OpenRouterVercel AI Gateway
What it isA model marketplace and router: one account and one API for 600+ models from 80+ providers. [source]A managed AI gateway from Vercel: one endpoint and one balance for many providers and models, usable from any infrastructure. [source]
APIOpenAI-compatible: change the base URL and model names to migrate. [source]OpenAI-compatible at https://ai-gateway.vercel.sh/v1 (Chat Completions and Responses), plus the Anthropic Messages API and the AI SDK. [source]
How you payPrepaid credits; each request deducts its cost at the provider's list price. No markup on provider pricing. [source]Prepaid AI Gateway Credits; each request is charged at the provider's list price. Enterprise teams can pay by invoice. [source]
Fees5.5% on credit purchases (Standard) or 8% (Business), charged when you buy credits, never per request. [source]No markup and no platform fee on tokens, including BYOK. You pay any payment processing fees, and some optional add-ons cost extra. [source]
Bring your own keysBYOK on Standard and Business: $25,000 of list-price inference per month with no fee, then 5%. Not on the Free plan. [source]BYOK with no markup on the paid tier, which needs purchased credits. If a request with your key fails, it is retried with system credentials and charged to your credits. [source]
Free tierFree plan: 25+ free models from 4 free providers, 50 requests/day. [source]A monthly free credit on a subset of models, with lower per-model rate limits (429 when exceeded). Buying credits moves you to the paid tier and the free credit stops. [source]
RoutingProvider routing with automatic fallback to other providers for the same model, optional fallback models, and an auto router (openrouter/auto) that adds no fee. [source]Provider and model fallbacks, with per-request provider options to order or restrict providers. [source]
Spend controlsWorkspaces with their own keys, limits and activity: 5 on Free and Standard, 1,000 on Business. [source]Budgets per team, project, API key or team member (BYOK spend excluded). Team-wide provider allowlist and zero data retention cost $0.10 per 1,000 requests. [source]

When to pick OpenRouter

  • You want free model variants that stay available after you buy credits: 1,000 requests/day once you have bought at least $10.
  • You want 600+ models from 80+ providers in one marketplace, with EU or US in-region routing on Business.
  • Your BYOK usage stays within the $25,000 of list-price inference per month that OpenRouter includes with no fee.

When to pick Vercel AI Gateway

  • You want no platform fee on tokens at all: Vercel charges the provider's list price, plus any payment processing fees.
  • You need budgets per team, project, API key or team member, or OpenTelemetry trace drains.
  • You build with the AI SDK and want the Anthropic Messages API and the OpenAI Responses API from the same gateway.

Where SentioGate fits

SentioGate is a third option if your aim is BYOK without prepaid credits: providers bill you directly with 0% token markup, model "auto" picks the cheapest qualifying model among your providers, and it automatically falls back to another model if one fails. It does not resell inference, so you reach only the providers whose keys you add.

See SentioGate vs OpenRouter for the details, or the free community pool to try it without keys.

FAQ

Is Vercel AI Gateway cheaper than OpenRouter?

Vercel says it charges no markup and no platform fee on tokens, including BYOK; you pay the provider's list price plus any payment processing fees, and some add-ons cost extra. OpenRouter also bills at the provider's list price, with a 5.5% (Standard) or 8% (Business) fee on credit purchases.

Do I need to host my app on Vercel to use AI Gateway?

No. Vercel documents AI Gateway as usable from any infrastructure, through an OpenAI-compatible endpoint at https://ai-gateway.vercel.sh/v1.

How does BYOK differ between the two?

On Vercel, BYOK is on the paid tier and needs purchased credits; if a request with your key fails, Vercel retries it with its own credentials and charges your credits. On OpenRouter, BYOK on Standard and Business is fee-free up to $25,000 of list-price inference per month, then 5%.

Which free tier is better?

OpenRouter's Free plan has 25+ free models at 50 requests/day, rising to 1,000/day once you have bought at least $10 of credits. Vercel gives a monthly free credit on a subset of models with lower rate limits, and the free credit stops once you buy credits.

Sources

Checked on Oct 30, 2026. Prices and limits change; the linked pages are authoritative.