Models/Claude Haiku 4.5 (Thinking)

Claude Haiku 4.5 (Thinking)

claude-haiku-4-5-20251001-thinking

Claude Haiku 4.5 扩展思维版，适用于复杂推理任务。

Extended ThinkingFast ResponseCost Effective

Input$0.353

Output$1.765

per 1M tokens

Extended Thinking

Step-by-step reasoning

Fast Response

Quick with deep analysis

Cost Effective

Affordable reasoning

Complex Tasks

Handle multi-step problems

API Documentation

View complete API reference with all parameters and examples.

View Docs

Advanced Features

Streaming

Enable real-time streaming responses with Server-Sent Events.

{
  "model": "claude-haiku-4-5-20251001-thinking",
  "stream": true,
  "max_tokens": 1024,
  "messages": [...]
}

Function Calling (Tools)

Enable Claude to use tools and call functions.

{
  "model": "claude-haiku-4-5-20251001-thinking",
  "max_tokens": 1024,
  "tools": [{
    "name": "get_weather",
    "description": "Get current weather for a location",
    "input_schema": {
      "type": "object",
      "properties": {
        "location": {"type": "string", "description": "City name"}
      },
      "required": ["location"]
    }
  }],
  "tool_choice": {"type": "auto"},
  "messages": [{"role": "user", "content": "What's the weather in Tokyo?"}]
}

PDF Support

Analyze PDF documents by sending them as base64 encoded content.

{
  "model": "claude-haiku-4-5-20251001-thinking",
  "max_tokens": 1024,
  "messages": [{
    "role": "user",
    "content": [{
      "type": "document",
      "source": {
        "type": "base64",
        "media_type": "application/pdf",
        "data": "<base64_encoded_pdf>"
      }
    }, {
      "type": "text",
      "text": "Summarize this document."
    }]
  }]
}

Structured Output (JSON Schema)

Get structured JSON responses that match your schema.

{
  "model": "claude-haiku-4-5-20251001-thinking",
  "max_tokens": 1024,
  "output_format": {
    "type": "json_schema",
    "schema": {
      "type": "object",
      "properties": {
        "name": {"type": "string"},
        "age": {"type": "integer"}
      },
      "required": ["name", "age"]
    }
  },
  "messages": [{"role": "user", "content": "Extract info: John is 30 years old"}]
}

Web Search

Enable Claude to search the web for up-to-date information.

{
  "model": "claude-haiku-4-5-20251001-thinking",
  "max_tokens": 1024,
  "tools": [{
    "type": "web_search_20250305",
    "name": "web_search",
    "max_uses": 5
  }],
  "messages": [{"role": "user", "content": "What's the latest news about AI?"}]
}

API Parameters Reference

Parameter	Type	Required	Description
model	string	Yes	Model identifier (e.g., claude-haiku-4-5-20251001-thinking)
messages	array	Yes	Array of message objects with role and content
max_tokens	integer	Yes	Maximum tokens in the response (1 - 128000)
system	string	No	System prompt to set context
stream	boolean	No	Enable streaming responses (SSE)
temperature	number	No	Sampling temperature (0.0 - 1.0)
top_p	number	No	Nucleus sampling threshold (0.0 - 1.0)
top_k	integer	No	Top-k sampling (0 - infinity)
stop_sequences	array	No	Sequences that stop generation
tools	array	No	Function calling tools definition
tool_choice	object	No	Tool selection strategy (auto/any/tool)
thinking	object	No	Enable extended thinking mode
output_format	object	No	Structured output with JSON schema

Full API Documentation

View complete API reference with streaming, thinking, and more.

View Documentation

Pricing

Input

$0.353

per 1M tokens

Output

$1.765

per 1M tokens

Billing: Cost = (input_tokens * input_price + output_tokens * output_price) / 1,000,000

关于 Claude Haiku 4.5 (Thinking)

Claude Haiku 4.5 (Thinking) 是由 Anthropic 提供的大语言模型 API。Claude Haiku 4.5 with extended thinking capability for complex reasoning tasks. 通过 API Models 平台，您可以使用统一的 API 接口调用该模型，享受比官方更低的价格。当前定价：Input: $0.353, Output: $1.765 per 1M tokens。

核心功能

Extended Thinking -- Step-by-step reasoning
Fast Response -- Quick with deep analysis
Cost Effective -- Affordable reasoning
Complex Tasks -- Handle multi-step problems

适用场景

聊天机器人与客服

构建智能对话系统，自动回答用户问题，提升客户服务效率。

内容生成

自动撰写文章、邮件、广告文案等文本内容，提高内容产出效率。

编程助手

辅助代码编写、调试和代码审查，加速软件开发流程。

数据分析

理解和分析非结构化数据，提取关键信息并生成报告摘要。

为什么选择 API Models

统一 API 接口 -- 一个 API Key 调用所有模型，无需分别注册各平台账号
价格优势 -- 比官方价格低 60-95%，适合小微开发者和初创团队
即开即用 -- 注册即可使用，支持 Stripe 和支付宝充值
完整文档 -- 提供详细的 API 文档和代码示例（cURL、Python、Node.js）

常见问题

Claude Haiku 4.5 (Thinking) 的价格是多少？

Claude Haiku 4.5 (Thinking) 通过 API Models 平台调用，当前定价：Input: $0.353, Output: $1.765 per 1M tokens。相比官方价格，最高可节省 95% 的费用。

如何使用 Claude Haiku 4.5 (Thinking) API？

在 API Models 注册账号并获取 API Key，然后通过我们的统一 API 端点调用即可。我们提供详细的 API 文档和 cURL、Python、Node.js 代码示例。

API Models 与 Anthropic 官方 API 有什么区别？

API Models 通过聚合平台提供与官方相同的 Claude Haiku 4.5 (Thinking) 模型，价格低 60-95%。我们提供统一的 API 接口，无需分别注册各平台账号，一个 API Key 即可调用所有模型。

支持哪些付款方式？

我们支持 Stripe（Visa、Mastercard 等国际信用卡）和支付宝付款。充值后积分即时到账。