Vercel AI SDK

The Vercel AI SDK is a TypeScript toolkit for building AI-powered applications. Opper publishes an official provider package, so any Opper model works with generateText, streamText, embed, and tool calls.

Setup

npm install @opperai/ai-sdk-provider ai

import { opper } from '@opperai/ai-sdk-provider';
import { generateText } from 'ai';

const { text } = await generateText({
  model: opper('openai/gpt-5.5'),
  prompt: 'Hello!',
});

Pass any Opper model string: opper('anthropic/claude-sonnet-4-6'), opper('gemini/gemini-3.5-flash'), opper('default'), and so on.

Session tracing

Wrap your model with opperSpan to group every call in a conversation under one trace in Opper. Traces are stored once you turn tracing on; without it, each call still appears in Logs with its token usage and cost.

import { wrapLanguageModel, generateText } from 'ai';
import { opper, opperSpan } from '@opperai/ai-sdk-provider';

const { middleware, handle } = opperSpan({ name: 'my-chat-session' });

const model = wrapLanguageModel({
  model: opper('openai/gpt-5.5'),
  middleware,
});

const { text } = await generateText({ model, prompt: 'Hello!' });
await handle.end(text); // closes the span

Traces

Grouped spans, per session.

Drop-in SDKs

The OpenAI, Anthropic, and Google AI SDKs against Opper.

Last modified on October 2, 2026

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Vercel AI SDK

Setup

Session tracing

Traces

Drop-in SDKs

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​Session tracing

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Traces

Drop-in SDKs

Setup

Session tracing

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