Claude Sonnet 5.5
Anthropic released the 文本 model · Launched on 2026-09
Commercial Closed-source
文本
API 可用
Claude Sonnet 5.5 is Anthropic's new-generation Sonnet model released on September 28, 2026, positioned as the best combination of speed and intelligence. It keeps a 1M-token context window and 128K max output, with adaptive thinking on by default (effort defaults to high) so depth can be tuned per task to control cost. Pricing stays at $2 per million input tokens and $10 per million output tokens, unchanged from Sonnet 5, making it the more economical everyday workhorse alongside Opus 5.5.
核心特性
- 1M tokens 上下文
- 128K 最大输出
- 自适应思考（effort 可调）
- 文本与图像输入
核心优势
- 速度与智能平衡最好
- 与 Sonnet 5 同价升级
- 批量 API 输入输出各 5 折
参数量
未公开
上下文窗口
1M tokens
API 支持
Yes
开源状态
Closed Source
发布日期
2026-09
提供商
Anthropic
输入 $2 / 1M tokens，输出 $10 / 1M tokens；缓存读取 $0.20 / 1M tokens
知识截止 2026 年 6 月；默认 effort=high，与 Opus 5.5、Fable 5.1 同代知识截止
