Anthropic 模型

Claude Sonnet 4.5

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...

阅读快速开始成本估算

AnthropicOpenRouter if availableCatalog

Tool callingJSON modeLong contextReasoningStreamingVision

输入价格$3 / 1M tokens

输出价格$15 / 1M tokens

上下文长度1M tokens

可用性Catalog

适用场景

coding agents
code review
complex writing
long-document analysis

OpenAI 兼容代码示例

保持 OpenAI SDK 调用方式不变，把 base_url 改为 NextModel，并使用模型目录 ID claude-sonnet-4-5。

Python

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.nextmodel.app/v1"
)

resp = client.chat.completions.create(
    model="claude-sonnet-4-5",
    messages=[{"role": "user", "content": "Hello from NextModel"}]
)

print(resp.choices[0].message.content)

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FAQ

Anthropic: Claude Sonnet 4.5 API 常见问题

Is Claude Sonnet 4.5 a good coding model?

Yes. It is listed as a high-quality coding and agent candidate because of its long context and instruction-following profile.