One key for AI workflows
Build through the API, or work in Primex Chat and Create. See your routing and usage costs in one place.
Explore Primex
Choose the intelligence for your work, then add the capabilities around it.
Reasoning, coding and tool use.
Explore current models and availability in the Catalog.
Explore modelsMedia models and specialized AI services.
Routing
Cost-focused partner routes or declared infrastructure. Two approaches for different workloads.
For workloads where a declared infrastructure tier comes first.
Know the infrastructure tier behind each request, alongside its cost.
For experiments and everyday workloads where cost comes first.
Let the route adapt to the workload, with cost as the priority.
Today, requests use Auto routing. Check the Catalog for the infrastructure tiers available to each API.
Developer quickstart
Choose a compatible model, then update your base URL and API key. Keep building with the SDK you know.
api.openai.com→gateway.primexos.comsk-...→prx-...Compatibility is endpoint- and offering-specific. The live Catalog and docs are authoritative.
import OpenAI from "openai";
const client = new OpenAI({
apiKey: "prx-...",
baseURL: "https://gateway.primexos.com/v1"
});
const response = await client.responses.create({
model: "YOUR_MODEL_ID",
input: "Build something useful."
});Create an account and generate a prx- key.
Run it in Playground or connect your existing SDK.
Top up your AI balance and pay for measured usage.
Why Primex
See how each request was routed, what it used, how long it took, and what you were charged.
See the model or service, measured units, request time and final net cost, attributed to the key that sent the request.
Check the requested mode and, where recorded, the tier that served it. Routing stays visible alongside usage and cost.
Failed requests aren’t billed. Set monthly spend caps for your application keys and track their spending in Usage. See the FAQ for how caps work.
req_7f3a2c9egpt-5.6-solLive models & pricing
A few useful starting points from the live Catalog. One AI balance covers models and services, each priced in the unit it measures.
Open the Catalog for current availability and pricing.
Getting started, connecting your tools and understanding your costs.
Create a Primex account, then try the Playground or open Chat and Create. For your own application, generate a prx- key and follow the client setup guide. Primex-managed APIs do not require separate upstream provider accounts.
Primex supports the OpenAI SDK on compatible chat and Responses endpoints, and the Anthropic SDK on compatible Claude Messages offerings. Setup guides cover Claude Code, Cursor, Windsurf, Continue and Cline, and MCP. Support depends on the selected model, endpoint and client features; check the Quickstart and live Catalog.
Verified describes declared infrastructure; current requests use Auto routing on that tier. Economy is planned as a cost-focused option using partner routes, with flexible upstream selection and fallback within its policy. It is not available to select yet. See routing options for the comparison and the Catalog for current offering details.
Add prepaid AI credits and pay for measured usage. No subscription is required; optional plans have rolling allowances and supported-usage limits. The Catalog lists each offering’s billing unit and price, with cache read, cache write and long-context rates where published. Any welcome credit is subject to account eligibility and required verification. See Billing and Credits.
Failed requests aren’t billed. Usage shows each request’s outcome, measured units and final net cost. Set an optional monthly spend cap for each customer API key. Caps apply to net recorded usage; a request already in flight can finish above the remaining amount.
Primex sends the inputs needed for your request to the upstream provider serving it and records usage and operational data for billing, support and reliability. Storage and retention differ across APIs, Chat and Create; upstream providers apply their own policies. Read the Privacy Policy and Policies.
Cryptocurrency payments are supported. Any additional payment methods available for your order are shown at checkout.
Start with Primex
Build with the API, think with Chat, or make something in Create. Start with one Primex account.
No credit card required to sign up. No subscription required.