npm install @better-agent/openai

import { defineAgent } from "@better-agent/core";
import { openai } from "@better-agent/openai";

export const supportAgent = defineAgent({
  name: "support",
  model: openai("gpt-5.5"),
  instruction: "You help customers.",
});

import { createOpenAI } from "@better-agent/openai";

const openai = createOpenAI({
  apiKey: process.env.OPENAI_API_KEY,
});

const agent = defineAgent({
  name: "researcher",
  model: openai("gpt-5.5"),
  tools: [
    openai.tools.webSearch({ searchContextSize: "medium" }),
  ],
});

const text = openai.text("gpt-5.5");

const summarize = defineTool({
  name: "summarize",
  description: "Summarize long text before the agent uses it.",
  inputSchema: z.object({
    content: z.string(),
  }),
  execute: async ({ content }) => {
    const result = await text.generate({
      input: `Summarize this in three bullets:\n\n${content}`,
    });

    return { summary: result.text };
  },
});

const embedding = openai.embedding("text-embedding-3-small");
const image = openai.image("gpt-image-1");
const speech = openai.speech("gpt-4o-mini-tts");
const transcription = openai.transcription("gpt-4o-mini-transcribe");

await app.agent("support").run({
  messages,
  providerOptions: {
    openai: {
      reasoningEffort: "medium",
    },
  },
});