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Claude Sonnet 5 正式推出:成爲免費同 Pro 用戶嘅默認模型
Anthropic 喺 2026 年 6 月 30 日 正式發布 Claude Sonnet 5 。呢個新模型即刻成爲 Claude.ai 免費同 Pro 計劃嘅默認模型,同時亦係 Claude Code 嘅 Pro 用戶新默認模型。換句話講,無論你係免費仔定係畀月費嘅用戶,一打開 Claude 就會用到 Sonnet 5。
邊度用到?
Sonnet 5 嘅覆蓋好全面:
Claude API — 用模型 ID claude-sonnet-5 就可以叫到
Claude Code — Pro 用戶會自動轉用
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呢個定價喺 Anthropic 官方價格頁同模型概覽都有列明 。早鳥優惠適用於所有 API 用量 。
性能:貼近 Opus 4.8,價錢平一截
Anthropic 話 Sonnet 5 係 「最有代理能力嘅 Sonnet」,專爲自主 AI 任務而設 。主要改進包括:
自主多步驟任務執行 — 模型可以自己計劃、推理同一氣呵成執行複雜任務,唔使逐個步驟指示
操作瀏覽器同終端機 — Sonnet 5 可以用工具控制網頁瀏覽器、程式碼終端機等介面
貼近 Opus 4.8 嘅表現 — Sonnet 5 嘅性能「最近先需要更大、更貴嘅模型」先做到,但 輸入成本平超過一半(標準 US$3 vs Opus 4.8 嘅 US$5 每百萬 tokens;早鳥價更加係 US$2 vs US$5)。有報告形容佢係「以明顯較低價格提供接近 Opus 4.8 嘅表現」