AI SDK Core

AI SDK Core is a set of functions that allow you to interact with language models and other AI models. These functions are designed to be easy-to-use and flexible, allowing you to generate text, structured data, and embeddings from language models and other AI models.

AI SDK Core contains the following main functions:

<IndexCards cards={[ { title: 'generateText()', description: 'Generate text and call tools from a language model.', href: '/docs/reference/ai-sdk-core/generate-text', }, { title: 'streamText()', description: 'Stream text and call tools from a language model.', href: '/docs/reference/ai-sdk-core/stream-text', }, { title: 'generateObject()', description: 'Generate structured data from a language model.', href: '/docs/reference/ai-sdk-core/generate-object', }, { title: 'streamObject()', description: 'Stream structured data from a language model.', href: '/docs/reference/ai-sdk-core/stream-object', }, { title: 'embed()', description: 'Generate an embedding for a single value using an embedding model.', href: '/docs/reference/ai-sdk-core/embed', }, { title: 'embedMany()', description: 'Generate embeddings for several values using an embedding model (batch embedding).', href: '/docs/reference/ai-sdk-core/embed-many', }, { title: 'experimental_generateImage()', description: 'Generate images based on a given prompt using an image model.', href: '/docs/reference/ai-sdk-core/generate-image', }, { title: 'experimental_transcribe()', description: 'Generate a transcript from an audio file.', href: '/docs/reference/ai-sdk-core/transcribe', }, { title: 'experimental_generateSpeech()', description: 'Generate speech audio from text.', href: '/docs/reference/ai-sdk-core/generate-speech', }, ]} />

It also contains the following helper functions:

<IndexCards cards={[ { title: 'tool()', description: 'Type inference helper function for tools.', href: '/docs/reference/ai-sdk-core/tool', }, { title: 'experimental_createMCPClient()', description: 'Creates a client for connecting to MCP servers.', href: '/docs/reference/ai-sdk-core/create-mcp-client', }, { title: 'jsonSchema()', description: 'Creates AI SDK compatible JSON schema objects.', href: '/docs/reference/ai-sdk-core/json-schema', }, { title: 'zodSchema()', description: 'Creates AI SDK compatible Zod schema objects.', href: '/docs/reference/ai-sdk-core/zod-schema', }, { title: 'createProviderRegistry()', description: 'Creates a registry for using models from multiple providers.', href: '/docs/reference/ai-sdk-core/provider-registry', }, { title: 'cosineSimilarity()', description: 'Calculates the cosine similarity between two vectors, e.g. embeddings.', href: '/docs/reference/ai-sdk-core/cosine-similarity', }, { title: 'simulateReadableStream()', description: 'Creates a ReadableStream that emits values with configurable delays.', href: '/docs/reference/ai-sdk-core/simulate-readable-stream', }, { title: 'wrapLanguageModel()', description: 'Wraps a language model with middleware.', href: '/docs/reference/ai-sdk-core/wrap-language-model', }, { title: 'extractReasoningMiddleware()', description: 'Extracts reasoning from the generated text and exposes it as a reasoning property on the result.', href: '/docs/reference/ai-sdk-core/extract-reasoning-middleware', }, { title: 'simulateStreamingMiddleware()', description: 'Simulates streaming behavior with responses from non-streaming language models.', href: '/docs/reference/ai-sdk-core/simulate-streaming-middleware', }, { title: 'defaultSettingsMiddleware()', description: 'Applies default settings to a language model.', href: '/docs/reference/ai-sdk-core/default-settings-middleware', }, { title: 'smoothStream()', description: 'Smooths text streaming output.', href: '/docs/reference/ai-sdk-core/smooth-stream', }, { title: 'generateId()', description: 'Helper function for generating unique IDs', href: '/docs/reference/ai-sdk-core/generate-id', }, { title: 'createIdGenerator()', description: 'Creates an ID generator', href: '/docs/reference/ai-sdk-core/create-id-generator', }, ]} />