alepha@docs:~/docs/.content/release/framework/docs/reference/providers$
cat AnthropicAiProvider.md | pretty
1 min read
Last commit:

#AnthropicAiProvider

#Import

typescript 
1import { AnthropicAiProvider } from "alepha/ai/anthropic";

#Overview

AI provider for the Anthropic Messages API, over plain fetch.

  • Streams with server-sent events and maps them to AiEvents: text deltas as they arrive, a tool call once its input JSON is complete.
  • Marks the system prompt and the tool list for prompt caching. Both stay byte-identical across the turns of a conversation (per-turn page data rides on the user message), so every turn after the first reads them from the cache.
  • Keeps the model's thinking blocks on the assistant message (vendor) and sends them back, as the API requires for a turn that called tools.
  • Maps failures to typed AiErrors: AiAuthError (401, 403), AiRateLimitError (429, with retryAfter), AiOverloadedError (529), AiContextLengthError (a prompt too long).

Environment: AI_API_KEY and AI_MODEL are required, checked at start. AI_BASE_URL replaces https://api.anthropic.com, for Cloudflare AI Gateway (https://gateway.ai.cloudflare.com/v1/<account>/<gateway>/anthropic).