Performance Surpasses Opus! Anthropic Leaked Document Reveals: The New Generation Super Model Claude Mythos Is Already in Testing

marsbitPublished on 2026-03-27Last updated on 2026-03-27

Abstract

According to leaked internal documents from Anthropic, the company's highly anticipated next-generation AI model, Claude Mythos, is currently in a secret testing phase. The documents reveal a new model tier named "Capybara," which represents a major technological leap, featuring a larger scale and superior intelligence that surpasses the flagship Claude Opus model. The leak also highlights significant concerns within Anthropic regarding unprecedented cybersecurity risks associated with Claude Mythos, prompting a cautious release strategy to balance advanced capabilities with safety. This development is expected to significantly raise the benchmark for large language models, intensifying competition in the AI industry and pushing the evolution of models toward deeper logical reasoning and complex task handling. The official release date for Claude Mythos remains unannounced.

The competition in computing power and intelligence in the field of artificial intelligence is entering a new phase as new models from top-tier labs are exposed.

On March 27, according to media reports citing internal leaked documents from Anthropic, the highly anticipated new generation super model Claude Mythos has now entered a secret testing phase. This leaked blog draft not only showcases the model's powerful performance but also sparks a fresh round of discussion on AI safety.

Defining a New Tier: The Leap from "Opus" to "Capybara"

The leaked document discloses a completely new model tier designation—Capybara. This tier represents the most groundbreaking technological leap in Anthropic's history:

Intelligence Ceiling: The document clearly states that Capybara corresponds to a new, larger-scale tier with a higher level of intelligence.

Surpassing the Flagship: Its comprehensive capabilities have fully surpassed those of the previously industry-benchmark Claude Opus model.

Naming Association: Internal information indicates that Capybara and Mythos most likely refer to different expressions of the same underlying architecture.

The Two Sides of the Coin: Unprecedented Cybersecurity Risks

Alongside the soaring intelligence level, Anthropic internally has also expressed high alert regarding the potential demonstrated by Claude Mythos.

Risk Assessment: The leaked document shows that the company believes this model presents unprecedented cybersecurity risks.

Safety Countermeasures: This risk warning also explains why Anthropic has always maintained a cautious release节奏, attempting to find a stricter balance between pursuing "the most powerful intelligence" and "human safety".

Industry Shockwaves: The Large Model Hierarchy Faces a Reshuffle

As OpenAI's most formidable competitor, Anthropic's move with this new model undoubtedly drops a bombshell on the entire industry:

Competition Escalation: The emergence of Claude Mythos means the baseline for large model capabilities will once again be significantly raised.

Technological Evolution: Judging from the currently disclosed information, the next generation of models is evolving from mere conversational ability towards deeper logical reasoning and complex task handling.

Conclusion: Searching for the "Mythical" Boundaries of AI

Although the official release date for Claude Mythos has not yet been set, the outline of "stronger intelligence" is already clearly visible. As AI's intelligence level begins to surpass the cognitive boundaries of humanity's past, how to harness this power will become a common challenge faced by Anthropic and even global tech giants.

Related Questions

QWhat is the name of Anthropic's new AI model that is currently in secret testing, as revealed by leaked documents?

AClaude Mythos

QAccording to the leak, what is the name of the new model tier that represents a major technological leap for Anthropic and is associated with Claude Mythos?

ACapybara

QWhich existing Anthropic model does the new Claude Mythos model reportedly surpass in overall capability?

AClaude Opus

QWhat major concern does Anthropic have regarding the Claude Mythos model, as mentioned in the leaked documents?

AIt presents unprecedented cybersecurity risks.

QHow is the emergence of Claude Mythos expected to impact the broader AI industry, according to the article?

AIt will significantly raise the benchmark for large model capabilities and force a reshuffling of the industry's top tier.

Related Reads

Can a Hair Dryer Earn $34,000? Deciphering the Reflexivity Paradox in Prediction Markets

An individual manipulated a weather sensor at Paris Charles de Gaulle Airport with a portable heat source, causing a Polymarket weather market to settle at 22°C and earning $34,000. This incident highlights a fundamental issue in prediction markets: when a market aims to reflect reality, it also incentivizes participants to influence that reality. Prediction markets operate on two layers: platform rules (what outcome counts as a win) and data sources (what actually happened). While most focus on rules, the real vulnerability lies in the data source. If reality is recorded through a specific source, influencing that source directly affects market settlement. The article categorizes markets by their vulnerability: 1. **Single-point physical data sources** (e.g., weather stations): Easily manipulated through physical interference. 2. **Insider information markets** (e.g., MrBeast video details): Insiders like team members use non-public information to trade. Kalshi fined a剪辑师 $20,000 for insider trading. 3. **Actor-manipulated markets** (e.g., Andrew Tate’s tweet counts): The subject of the market can control the outcome. Evidence suggests Tate’sociated accounts coordinated to profit. 4. **Individual-action markets** (e.g., WNBA disruptions): A single person can execute an event to profit from their pre-placed bets. Kalshi and Polymarket handle these issues differently. Kalshi enforces strict KYC, publicly penalizes insider trading, and reports to regulators. Polymarket, with its anonymous wallet-based system, has historically been more permissive, arguing that insider information improves market accuracy. However, it cooperated with authorities in the "Van Dyke case," where a user traded on classified government information. The core paradox is reflexivity: prediction markets are designed to discover truth, but their financial incentives can distort reality. The more valuable a prediction becomes, the more likely participants are to influence the event itself. The market ceases to be a mirror of reality and instead shapes it.

marsbit2m ago

Can a Hair Dryer Earn $34,000? Deciphering the Reflexivity Paradox in Prediction Markets

marsbit2m ago

First Day Review of "Musk's WeChat" XChat: Even Worse Than Expected

Elon Musk's much-anticipated "WeChat-like" app, XChat, has officially launched after multiple delays. The initial review reveals a product that falls short of expectations, offering an experience largely similar to X Platform's (formerly Twitter) direct messages, despite being marketed as an encrypted communication tool. Key observations from the first-day test include: 1. The app's promoted "end-to-end encryption" and its claimed relation to Bitcoin's architecture were criticized by experts as a superficial attempt to capitalize on crypto buzz, with no real technical connection. 2. Musk's vision of an ad-free "secure communication system" is technically met, but only because the app is currently extremely basic, featuring only a single chat interface. 3. A promised anti-screenshot feature appears inconsistent; it works in X Platform group chats but fails within the XChat app itself, where screenshots still capture avatars. 4. The app supports 45 languages and has a 16+ age rating, indicating a broader tolerance for content compared to WeChat's 13+ rating. 5. A puzzling login process requires users to verify the email associated with their X account. 6. The touted encryption" feels minimal in practice, with its presence only indicated by a simple "Encrypted - Yes" label on messages. 7. Disappearing message timers for groups can be set from 5 minutes to 4 weeks, with the timer starting upon being read by a user. 8. Group invite links are shared with X Platform groups. 9. Group size limits are planned to be increased, aiming for 1000 members, a move that has drawn user criticism. 10. The app offers 8 different colored icons, and its chat bubbles are notably similar to WeChat's. Message deletion options mimic Telegram's. Crucially, many pre-announced features like importing X contacts, integrating Grok AI, X Money payments, and Cashtags are not yet available. The initial release is seen as a bare-bones and underwhelming first step.

Odaily星球日报1h ago

First Day Review of "Musk's WeChat" XChat: Even Worse Than Expected

Odaily星球日报1h ago

Trading

Spot
Futures
活动图片