Anthropic 於 2026 年 6 月 9 日推出兩個版本的 Claude 模型:公開版 Claude Fable 5(具備安全分類器)與受限版 Claude Mythos 5(無安全分類器)。 兩個模型共享相同的底層架構、1百萬 token 的上下文視窗、128k token 的最大輸出,以及相同的定價(每 1百萬輸入 token 10 美元,每 1百萬輸出 token 50 美元)。

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On June 9, 2026 (US time), Anthropic released two configurations of its next-generation Claude model: Claude Fable 5 (public) and Claude Mythos 5 (restricted, invitation-only via "Project Glasswing") . Fable 5 was described as the most capable model Anthropic had ever made generally available, built on the same Mythos-class technology that had previously been kept behind closed doors
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Fable 5 和 Mythos 5 其實是同一個底層模型 — 擁有完全相同的權重、參數數量與原始能力 。唯一的區別在於推理階段的行為限制:
兩個模型共享完全相同的規格與定價:
On July 4, 2026, MixRoute — a Singapore-based unified API gateway supporting 200+ models with a single API key — confirmed it will offer OpenAI's GPT-5.6 model family as soon as the models reach general availability, alongside Claude Fable 5, which is already live on the platform . GPT-5.6 remains in a limited preview gated to a small, government-vetted group of partners and has not yet reached general availability
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以兩種治理機制部署相同模型權重,代表了前沿 AI 部署模式的結構性轉變:
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Anthropic 於 2026 年 6 月 9 日推出兩個版本的 Claude 模型:公開版 Claude Fable 5(具備安全分類器)與受限版 Claude Mythos 5(無安全分類器)。
Anthropic 於 2026 年 6 月 9 日推出兩個版本的 Claude 模型:公開版 Claude Fable 5(具備安全分類器)與受限版 Claude Mythos 5(無安全分類器)。 兩個模型共享相同的底層架構、1百萬 token 的上下文視窗、128k token 的最大輸出,以及相同的定價(每 1百萬輸入 token 10 美元,每 1百萬輸出 token 50 美元)。
美國政府於 6 月 12 日以國家安全為由實施出口管制,Anthropic 於 6 月 13 日全球關閉兩個模型。