Claude Mythos Preview
Closed Deprecated Multimodal
claude-mythos-preview
Gated research-preview frontier model for defensive cybersecurity under Project Glasswing; invitation-only.
Released
Apr 7, 2026
Context window
Not disclosed
Max output
Not disclosed
Parameters
Not disclosed
Input price
$25.00 per 1M
Output price
$125.00 per 1M
Prices are first-party list prices in USD at the standard tier. Last verified Oct 30, 2026.
Pricing
Launch priceApr 7, 2026
$25.00 in / $125.00 out
Current price
since Apr 7, 2026
$25.00 in / $125.00 out