Claude Mythos
Independent research hub covering Anthropic’s next-generation Capybara-tier AI model. Benchmarks, capabilities, cybersecurity, release timeline, and industry impact — all in one place.
Independent research hub covering Anthropic’s next-generation Capybara-tier AI model. Benchmarks, capabilities, cybersecurity, release timeline, and industry impact — all in one place.
What We Cover
Nine research clusters spanning the full Claude Mythos story — from technical benchmarks to business impact.
Core Information
What Claude Mythos is, the Capybara tier hierarchy (Haiku → Sonnet → Opus → Capybara), and what makes this model architecturally different from its predecessors.
Benchmarks and Performance
Terminal-Bench 2.0, SWE-bench Verified, ARC-AGI-2, GPQA Diamond, AIME 2025 — we track scores, provide context, and explain what they mean for real-world applications.
Cybersecurity Implications
The Chinese espionage campaign, Accenture Cyber.AI, stock market impact on CRWD and PANW, and the broader question of AI in offensive vs. defensive security.
Model Comparisons
Claude Mythos vs GPT-5, Gemini 3.1 Pro, Grok 4, and previous Claude models — side-by-side analysis with real benchmark data, not marketing claims.
Safety and Ethics
ASL-4 protocols, responsible scaling, the “is Claude Mythos dangerous?” debate, and what the cybersecurity capabilities mean for AI governance worldwide.
Release and Access
Timeline predictions based on Polymarket data, API availability, pricing estimates, and phased rollout strategy for developers and enterprises.
Business and Industry Impact
Anthropic’s $60B+ IPO target for October 2026, market reactions, enterprise adoption patterns, and competitive landscape shifts.
The Leak Story
How ~3,000 CMS files went public, who discovered them (Roy Paz, Alexandre Pauwels, Peter Wildeford), Fortune’s exclusive, and what else was exposed.
Developer Resources
Coding capabilities, agent workflows, API integration, and practical guides for building applications with Capybara-tier intelligence.
Key Numbers
- 19 in-depth articles across 9 research clusters
- 270,000+ characters of original research and analysis
- 70+ primary sources analyzed and cross-referenced
- 11 benchmark datasets tracked and explained
All Articles
Core Information
- What Is Claude Mythos? Complete Guide to Anthropic’s Capybara-Tier Model
- Claude Mythos Capybara — Understanding the New Model Tier
- Anthropic Capybara Tier — The New Level Above Opus
Benchmarks and Capabilities
- Claude Mythos Benchmark Results and Performance Analysis
- Claude Mythos Capabilities — What It Can Actually Do
- Claude Mythos for Coding — Developer Deep Dive
- Claude Mythos Agent Workflows — Building Autonomous Systems
Cybersecurity
Comparisons
- Claude Mythos vs GPT-5 — Head-to-Head Comparison
- Claude Mythos vs Gemini 3.1 Pro
- Claude Mythos vs Opus — What Changed?
Safety and Ethics
Release, Pricing, and API
- Claude Mythos Release Date — Timeline and Predictions
- Claude Mythos Pricing — What to Expect
- Claude Mythos API — Access and Integration Guide
Business and News
- Anthropic IPO 2026 — Valuation, Timeline, and Market Impact
- Anthropic Data Leak 2026 — The Full Story
Questions About Claude Mythos
What is Claude Mythos?
Claude Mythos is an unreleased AI model by Anthropic, revealed through a data leak on March 27, 2026. It sits in the new Capybara tier — above Opus — and is described as “a step change” in AI capabilities across coding, reasoning, and cybersecurity.
When will Claude Mythos be released?
No confirmed date yet. Polymarket predictions show 27% chance by April 30 and 45% by June 30, 2026. Anthropic is expected to do a phased rollout starting with cyber defense organizations.
How does Claude Mythos compare to GPT-5?
On key benchmarks, they are closely matched: tied at 81.8% on Terminal-Bench 2.0, but Claude leads on ARC-AGI-2 (68.8% vs 54.2%) and holds +144 Elo on GDPval-AA. Neither dominates across all benchmarks.
Is this an official Anthropic website?
No. claudemythos.info is a fully independent research platform. We are not affiliated with, endorsed by, or sponsored by Anthropic. Visit anthropic.com for official information.
Is Claude Mythos dangerous?
It raises significant dual-use concerns, especially in cybersecurity. The Chinese espionage campaign of September 2025 showed current Claude models can be weaponized. Anthropic’s ASL-4 safety protocols aim to mitigate these risks.
How much will Claude Mythos cost?
No official pricing yet. For reference, Opus 4.6 costs $15/$75 per million tokens (input/output). Capybara tier pricing is expected to be higher. We will update our pricing article when official information is available.
Where can I follow updates?
Follow us on YouTube, GitHub, and Pinterest. You can also visit our About page for all contact details.