@standardagents/anthropic

Anthropic (Claude) provider for Standard Agents. Wraps the official @anthropic-ai/sdk and translates between the Standard Agents provider spec and the Anthropic Messages API.

Features

• Streaming and non-streaming generation through the Messages API
• Tool use with parallel tool results and image tool outputs
• Extended thinking across model generations: adaptive thinking + effort on Claude 4.6+, token budgets on Claude 4.0-4.5, with thinking blocks (text + signature) round-tripped exactly on multi-turn conversations
• Anthropic server-side web_search tool exposed as a provider tool
• Vision (images), PDF and plain-text document inputs
• Structured outputs via output_config.format for JSON schema response formats
• Prompt caching opt-in for the system prompt (providerOptions.cacheSystemPrompt)
• Live model listing and per-model capability detection via the Anthropic Models API
• Usage normalization (prompt/completion/cached/reasoning tokens) plus exact per-request cost derived from raw billing buckets (cache writes at 1.25x/2x, cache reads at 0.1x) for documented Claude models

Usage

import { defineModel } from '@standardagents/spec';
import { anthropic } from '@standardagents/anthropic';

export default defineModel({
  name: 'claude-opus',
  provider: anthropic,
  model: 'claude-opus-4-8',
  inputPrice: 5,
  outputPrice: 25,
  providerOptions: {
    cacheSystemPrompt: true,
  },
});

Set ANTHROPIC_API_KEY in your environment.