Anthropic | TanStack AI 文档

Anthropic 适配器提供对 Claude 模型的访问，包括 Claude Sonnet 4.5、Claude Opus 4.5 等。

安装

npm install @tanstack/ai-anthropic

基本用法

typescript

import { chat } from "@tanstack/ai";
import { anthropicText } from "@tanstack/ai-anthropic";

const stream = chat({
  adapter: anthropicText("claude-sonnet-4-5"),
  messages: [{ role: "user", content: "Hello!" }],
});

基本用法 - 自定义 API 密钥

typescript

import { chat } from "@tanstack/ai";
import { createAnthropicChat } from "@tanstack/ai-anthropic";

const adapter = createAnthropicChat(process.env.ANTHROPIC_API_KEY!, {
  // ... your config options
});

const stream = chat({
  adapter: adapter("claude-sonnet-4-5"),
  messages: [{ role: "user", content: "Hello!" }],
});

配置

typescript

import { createAnthropicChat, type AnthropicChatConfig } from "@tanstack/ai-anthropic";

const config: Omit<AnthropicChatConfig, 'apiKey'> = {
  baseURL: "https://api.anthropic.com", // Optional, for custom endpoints
};

const adapter = createAnthropicChat(process.env.ANTHROPIC_API_KEY!, config);

示例：聊天完成

typescript

import { chat, toServerSentEventsResponse } from "@tanstack/ai";
import { anthropicText } from "@tanstack/ai-anthropic";

export async function POST(request: Request) {
  const { messages } = await request.json();

  const stream = chat({
    adapter: anthropicText("claude-sonnet-4-5"),
    messages,
  });

  return toServerSentEventsResponse(stream);
}

示例：使用工具

typescript

import { chat, toolDefinition } from "@tanstack/ai";
import { anthropicText } from "@tanstack/ai-anthropic";
import { z } from "zod";

const searchDatabaseDef = toolDefinition({
  name: "search_database",
  description: "Search the database",
  inputSchema: z.object({
    query: z.string(),
  }),
});

const searchDatabase = searchDatabaseDef.server(async ({ query }) => {
  // Search database
  return { results: [] };
});

const stream = chat({
  adapter: anthropicText("claude-sonnet-4-5"),
  messages,
  tools: [searchDatabase],
});

模型选项

Anthropic 支持各种特定于提供商的选项

typescript

const stream = chat({
  adapter: anthropicText("claude-sonnet-4-5"),
  messages,
  modelOptions: {
    max_tokens: 4096,
    temperature: 0.7,
    top_p: 0.9,
    top_k: 40,
    stop_sequences: ["END"],
  },
});

思考（扩展思考）

使用 token 预算启用扩展思考。这允许 Claude 展示其推理过程，该过程以思考块的形式流式传输

typescript

modelOptions: {
  thinking: {
    type: "enabled",
    budget_tokens: 2048, // Maximum tokens for thinking
  },
}

注意： max_tokens 必须大于 budget_tokens。适配器会自动调整 max_tokens（如果需要）。

提示缓存

缓存提示以提高性能并降低成本

typescript

const stream = chat({
  adapter: anthropicText("claude-sonnet-4-5"),
  messages: [
    {
      role: "user",
      content: [
        {
          type: "text",
          content: "What is the capital of France?",
          metadata: {
            cache_control: {
              type: "ephemeral",
            },
          },
        },
      ],
    },
  ],
});

摘要

Anthropic 支持文本摘要

typescript

import { summarize } from "@tanstack/ai";
import { anthropicSummarize } from "@tanstack/ai-anthropic";

const result = await summarize({
  adapter: anthropicSummarize("claude-sonnet-4-5"),
  text: "Your long text to summarize...",
  maxLength: 100,
  style: "concise", // "concise" | "bullet-points" | "paragraph"
});

console.log(result.summary);