聲明：美國政府指令暫停 Fable 5 與 Mythos 5 的訪問（英中對照）

*Statement on the US Government Directive to Suspend Access to Fable 5 and Mythos 5*

來源：Anthropic 官方公告（Announcements）| 2026 年 6 月 12 日 | 英中對照版

The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees. The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance. Access to all other Anthropic models will not be affected.

美國政府援引國家安全相關權限，發佈了一項出口管制指令，要求暫停所有外國公民——無論身處美國境內或境外，包括 Anthropic 的外籍員工——對 Fable 5 與 Mythos 5 的一切訪問。該命令的實際後果是：為確保合規，我們必須立即對所有客戶停用 Fable 5 與 Mythos 5。對 Anthropic 其他所有模型的訪問不受影響。

We received the directive from the government today at 5:21pm (ET). The letter did not provide specific details of its national security concern. Our understanding is that the government believes it has become aware of a method of bypassing, or "jailbreaking" Fable 5. We reviewed a demonstration of this specific technique being used to identify a small number of previously known, minor vulnerabilities. These vulnerabilities all appear relatively simple, and we have found that other publicly-available models are able to discover them as well without requiring a bypass.

我們於今日（美東時間）下午 5:21 收到政府的這項指令。函件並未提供其國家安全顧慮的具體細節。據我們理解，政府認為他們已掌握一種繞過——或稱「越獄」——Fable 5 的方法。我們查看了一段演示，展示該特定技術被用於識別少數幾個此前已知的輕微漏洞。這些漏洞看起來都相對簡單，而且我們發現其他公開可用的模型同樣能夠發現它們，無需任何繞過手段。

一、Anthropic 對 Fable 安全防護的立場 / Anthropic's Posture on Fable's Safeguards

Anthropic's posture with respect to Fable's safeguards, as laid out in our launch blog post, is the following:

正如我們在發佈博文中所闡述的，Anthropic 對於 Fable 安全防護措施的立場如下：

• We have instituted strong safeguards that greatly reduce the likelihood that Fable is misused for tasks related to cybersecurity (among others). In fact, our safeguards are so strong that many users have complained that they are overly broad.
• In the weeks leading up to the launch of Fable, Anthropic worked with the US government, the UK AISI, multiple private third-party organizations and internal teams to red-team Fable's safeguards for thousands of hours in total.
• These tests showed that Fable's safeguards are substantially more effective than those of any previously deployed model.
• No testers have yet been able to find a universal jailbreak—a jailbreak method that can very broadly bypass the model's safeguards, unblocking a wide range of cyber capabilities.
• We suspect that perfect jailbreak resistance is not currently possible for any model provider. Every safeguard used in the industry is vulnerable to non-universal jailbreaks (which can elicit some cyber information in specific circumstances), and it is likely that universal jailbreaks will eventually be found in the future. We stated this clearly when we released Fable 5.

• 我們已部署強有力的安全防護措施，大幅降低了 Fable 被濫用於網絡安全（及其他）相關任務的可能性。事實上，我們的防護措施如此嚴格，以至於許多用戶抱怨它們管得過寬。
• 在 Fable 發佈前的數週裏，Anthropic 與美國政府、英國人工智能安全研究所（UK AISI）、多傢俬營第三方機構及內部團隊合作，對 Fable 的安全防護措施進行了總計數千小時的紅隊測試。
• 這些測試表明，Fable 的安全防護措施遠比此前部署的任何模型都更為有效。
• 目前還沒有任何測試者能夠找到「通用越獄」——一種能夠極為廣泛地繞過模型防護、解鎖大量網絡攻擊能力的越獄方法。
• 我們認為，對任何模型提供商而言，完美的越獄防禦目前都不可能實現。業界使用的每一種防護措施都易受「非通用越獄」的影響（即在特定情境下能套取出一些網絡攻擊信息），而通用越獄很可能終將在未來被發現。我們在發佈 Fable 5 時就已明確說明了這一點。

Given that perfect jailbreak resistance does not appear to be possible today, Anthropic adopted a defense in depth strategy with Fable 5. We aimed to make jailbreaks either narrow (in the case of non-universal jailbreaks) or very expensive to produce (in the case of universal jailbreaks), and to combine this with thorough monitoring to quickly detect and shut down any successful attacks. This is also why Anthropic has required 30-day retention of customer data with Fable—a policy change that carries real costs for us with customers, but that allows us to research and mitigate jailbreaks.

鑑於完美的越獄防禦在今天看來並不可能實現，Anthropic 對 Fable 5 採取了「縱深防禦」（defense in depth）策略。我們的目標是讓越獄要麼影響範圍狹窄（針對非通用越獄），要麼製作成本極高（針對通用越獄），並輔以全面監控，以迅速檢測並封堵任何成功的攻擊。這也是 Anthropic 之所以要求對 Fable 客戶數據保留 30 天的原因——這項政策變更讓我們在客戶層面付出了實實在在的代價，但它使我們得以研究並緩解越獄問題。

We stand by this defense in depth strategy. It reduces the risks posed by Fable, making them comparable to the risks of existing models already deployed across the industry.

我們堅持這一縱深防禦策略。它降低了 Fable 所帶來的風險，使其與業界已經部署的現有模型的風險相當。

二、關於越獄披露的事實 / The Facts on Jailbreak Disclosures

We have not even received a disclosure of a concerning non-universal potential jailbreak that led to a harmful result. The potential jailbreaks that have been disclosed to us are either entirely benign responses or are minor findings that provide no Mythos-specific uplift.

我們甚至從未收到過任何關於「導致有害結果的、令人擔憂的非通用潛在越獄」的披露。已向我們披露的潛在越獄，要麼是完全無害的回應，要麼是無法提供任何 Mythos 特有能力提升的輕微發現。

To date, the government has only given us verbal evidence of a potential narrow, non-universal jailbreak, which essentially consists of asking the model to read a specific codebase and fix any software flaws. Our understanding is that one potential jailbreak was shared with the government. We have reviewed a report that we believe is the basis of the government's directive and validated that the level of capability displayed there is widely available from other models (including OpenAI's GPT-5.5), and is used every day by the defenders who keep systems safe. We will share more details over the next 24 hours.

迄今為止，政府只向我們提供了一項潛在的、範圍狹窄的非通用越獄的口頭證據，其本質不過是要求模型閱讀某個特定代碼庫並修復其中的軟件缺陷。據我們理解，有一項潛在越獄被分享給了政府。我們已查閱了一份我們認為構成政府指令依據的報告，並證實其中所展示的能力水平在其他模型（包括 OpenAI 的 GPT-5.5）中廣泛可得，而且每天都被那些維護系統安全的防禦者所使用。我們將在未來 24 小時內分享更多細節。

三、合規、異議與歉意 / Compliance, Disagreement, and Apology

We are complying with the government's legal directive and are removing access to Fable 5 and Mythos 5 for all users. However, we disagree that the finding of a narrow potential jailbreak should be cause for recalling a commercial model deployed to hundreds of millions of people. If this standard was applied across the industry, we believe it would essentially halt all new model deployments for all frontier model providers.

我們正在遵從政府的法律指令，對所有用戶移除 Fable 5 與 Mythos 5 的訪問權限。然而，我們不認同「發現一項範圍狹窄的潛在越獄」就應成為召回一款已向數億人部署的商業模型的理由。如果這一標準在全行業推行，我們相信它將實質上叫停所有前沿模型提供商的一切新模型部署。

As we have stated publicly, we believe the government should have the ability to block unsafe deployments, as part of a statutory process that is transparent, fair, clear, and grounded in technical facts. This action does not adhere to those principles.

正如我們公開表態的那樣，我們認為政府應當有能力阻止不安全的部署，但這應作為一套透明、公平、明確且立足於技術事實的法定程序的一部分。此次行動並未遵循這些原則。

We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible.

我們對此次給客戶造成的中斷深表歉意。我們相信這是一場誤會，正在努力盡快恢復訪問。

*本文為 Anthropic 官方公告，英中對照版由 Lamjin 整理翻譯，僅供學習參考；譯文如與英文原文有出入，以英文原文為準。*

如果你在使用 Claude 或 Fable 5 時遇到訪問異常或賬號受限，建議參考 《AI 賬號風控排查：IP 信譽與網絡環境檢測指南》 排查網絡環境問題。

常見問題

Fable 5 是什麼？

Fable 5 是 Anthropic 旗下的高能力 AI 模型（類比 Claude Opus 級別），按本文發佈時間的命名慣例屬於下一代旗艦產品。Mythos 5 是同期發佈的另一款模型。本文涉及的政府指令暫停了這兩款模型對所有外國公民的訪問。

這次禁令對普通用戶有什麼影響？

指令生效期間，所有外國公民（包括身處美國境內的外籍員工）無法訪問 Fable 5 與 Mythos 5。其他 Anthropic 模型（如 Claude Sonnet、Claude Haiku 等）訪問不受影響。

什麼是"越獄"（jailbreak）？

越獄指通過特定提示詞或技術手段繞過模型安全防護，使其生成原本被拒絕的內容。本次政府援引的是一種"範圍狹窄的非通用越獄"——即只能在特定條件下繞過部分限制，並非能普遍解除所有防護的通用越獄。

Anthropic 的立場是什麼？

Anthropic 表示遵從法律指令、移除訪問，但不認同這一標準應成為召回商業模型的依據——因為若全行業推行，將實質上叫停所有前沿模型的新部署。Anthropic 主張政府應通過透明、公平、立足技術事實的法定程序行使管控權。

參考來源

• Anthropic Announcements（官方公告頁）