LLM
Preview
Proprietary
Claude Mythos 5
Limited security research and unrestricted red-teaming
Release2026-06-09
Context1M
Max output128,000 tokens
ParametersUndisclosed
Local / VRAMAPI only
LicenseProprietary
Overview
Claude Mythos 5 is a model in the LLM category from Anthropic. It was released in 2026-06-09. The vendor is based in US. Best for: Limited security research and unrestricted red-teaming.
Strengths
- Less restricted than Fable
- Frontier reasoning
Limits
- Not publicly available
- Requires the trusted-access program
Specifications
| Vendor | Anthropic |
|---|---|
| Category | LLM |
| Release | 2026-06-09 |
| Status | Preview |
| License | Proprietary |
| Commercial use | Not specified |
| Context window | 1M |
| Max output tokens | 128,000 |
| Input modalities | Text, Image |
| Output modalities | Text |
| Prompt types | Text |
| Negative prompts | No |
| Max outputs | 1 |
| Local deployment | No |
| API access | Yes |
| Pricing | Private / trusted access |
| Confidence | Medium |
| Vendor country | US |
| Vendor type | Frontier lab |
Pricing & hardware
Private / trusted access
API-only: local GPU memory is not applicable. API access is available.