Mastra works with AI SDK providers, so the shortest path is to create an OpenAI-compatible provider that points at AI Stats.
Install
npm install @mastra/core @ai-sdk/openai ai
import { Agent } from "@mastra/core/agent";
import { createOpenAI } from "@ai-sdk/openai";
const aiStats = createOpenAI({
apiKey: process.env.AI_STATS_API_KEY,
baseURL: "https://api.phaseo.app/v1",
compatibility: "compatible",
});
export const agent = new Agent({
name: "support-agent",
instructions: "Answer in two short paragraphs.",
model: aiStats("openai/gpt-5-nano"),
});
Notes
- Use the base URL only, not
/chat/completions or /responses.
- Mastra agent behavior depends on the AI SDK provider path. Test tools and streaming before production.
- Use AI Stats routing controls at the request level or through presets when you need provider preferences.
Last modified on June 11, 2026
