Is Claude Mythos Preview Down?

Quickest ways to check the current status of red.anthropic.com plus recent known issues and working alternatives if it's out.

Last editorial review: 2026-04-20

How to check right now

Step 1 -- Load the site
Open red.anthropic.com→

The simplest check. If it loads and you can log in, the tool is up for you.

Step 2 -- Crowdsourced reports
DownDetector: Claude Mythos Preview→

User-reported outages aggregated across regions. Good signal for partial or regional outages.

Step 3 -- Live social
Search X for “Claude Mythos Previewdown” →

Live tweets from other users. Fastest signal for a fresh outage -- often beats status pages by 10-20 minutes.

Step 4 -- Official status page
Find Claude Mythos Preview's status page →

Most vendors publish a status page at status.[domain] or on Statuspage.io. Google-search to find the current URL.

Known issues we've tracked

Mythos's cybersecurity capability is the reason for its gated release. Anthropic's red-team evaluations showed the model could plan end-to-end network intrusion chains, which Anthropic deemed too risky for open API access
2026-04•Anthropic Project Glasswing announcement, Axios, CNBC, Schneier on Security
Naming convention is confusing: 'Claude Mythos Preview' is the public product name, internal codename was Capybara, and it's sometimes referred to as 'Mythos 5' by third-party reporters (there is no Mythos 1-4)
2026-04•Axios, Fortune
Access applications are not open -- Anthropic is approaching partner orgs directly rather than accepting inbound requests
2026-04•Anthropic Glasswing page
Axios reported 2026-04-19 that the NSA is among the ~40 orgs with Mythos access, despite the Pentagon's formal supply-chain risk designation of Anthropic. Dario Amodei reportedly met with W.H. Chief of Staff Susie Wiles and Treasury Secretary Scott Bessent on 2026-04-17. Material context if you are evaluating Mythos / Glasswing in a federal or defense-adjacent procurement -- the political posture inside the US government is not uniform
2026-04•Axios, TechCrunch, Engadget

Issues here are sourced from our editorial sweeps, not real-time telemetry. Newer issues may exist.

What to use if Claude Mythos Preview is down

Top AIToolTier-ranked alternatives in the same category, ordered by our overall score.

A

Muse Spark (Meta)

8.8

Meta's first model from its Superintelligence Lab -- natively multimodal with Contemplating mode for multi-agent reasoning

A

Claude (Anthropic)

8.5

Anthropic's flagship LLM -- Opus 4.7 (launched April 16, 2026) with 1M-token context, high-res vision, new xhigh reasoning level, and the most natural conversational style

A

Gemini (Google)

8.3

Google's LLM with deep Google Workspace integration, 2M token context window, and native code execution

B

Grok

7.5

xAI's irreverent chatbot with a direct line to X/Twitter -- real-time data meets unfiltered personality

B

GPT-5.4-Cyber (OpenAI)

7.2

OpenAI's defensive-cybersecurity variant of GPT-5.4, launched 2026-04-16. Lowered refusal boundary for security-research tasks and native binary reverse-engineering. Access gated via Trusted Access for Cyber (TAC) program -- thousands of verified defenders, hundreds of teams, no public pricing

About Claude Mythos Preview

Tier C (6.5/10). Anthropic's most capable model -- a gated research preview via Project Glasswing, cybersecurity-specialized. 73% success on expert CTF tasks, 32-step autonomous network attacks. Not generally available.

Read the full Claude Mythos Previewreview →