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ai

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AI SDK by Vercel - build apps like ChatGPT, Claude, Gemini, and more with a single interface for any model using the Vercel AI Gateway or go direct to OpenAI, Anthropic, Google, or any other model provider.

ai-sdk.dev/docs

vercel/ai

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/** * If `text` is exactly the wide `string` type, there are no string literals to * preserve, so this resolves to `never`. * * If `text` is a string literal or a union of string literals, this resolves * to that literal union unchanged. * * This is used when building template-literal model identifiers (for example * `"provider:modelId"`) so that editors can suggest concrete `modelId` values * when the underlying method parameter is narrowed, while falling back to a * generic `"provider:${string}"` style overload when the parameter is only * typed as `string`. */ export type ExtractLiteralUnion<text> = text extends string ? string extends text ? never : text : never;