Comparable public facts
| Field | Gemini 3.8 Flash Cyber | OpenAI Astra | Claude Mythos 5.1 |
|---|---|---|---|
| Release state | Restricted access through Fairwind | Evaluation published; availability promised soon | Trusted-access release |
| Public self-service endpoint | Not observed | Not observed | Not observed |
| Public price | Unknown for Cyber variant | Unknown | Unknown |
| Published focus | Vulnerability discovery and patching | Advanced cybersecurity capability and safeguards | Authorized advanced work under different safeguards |
| Legal compliance | Not established by access | Not established by evaluation | Not established by trusted access |
The minimum buyer packet
- Program eligibility and named users.
- Written authority for systems and repositories in scope.
- Read, propose, commit, merge and deploy permissions as separate rows.
- Secrets, personal data and vulnerability-data handling.
- Finding reproduction and patch validation owner.
- Coordinated disclosure and incident path.
- Exit, revocation, logs and evidence preservation.
Why this is not a capability leaderboard
The vendors publish different evaluations, configurations and safeguards. Comparing headline percentages would mix datasets, access tiers and test conditions. A buyer should leave performance Unknown until the same authorized test can be run under disclosed controls.
Freshness rule
Recheck this matrix when a provider publishes general availability, a system/model card, program terms, a price, an endpoint or a material safeguard change. Preserve the old date so procurement can reconstruct which facts supported a decision.
FAQ
Which cyber AI model is best?
The public sources do not support a like-for-like winner. Access, safeguards, authority and contract evidence differ.
Is OpenAI Astra available?
OpenAI says it plans to make Astra available soon. The reviewed source is an evaluation, not a general-availability page.
Can Flash Cyber or Mythos be used for offensive testing?
Access to a model does not grant authority over a target. The intended use, program policy and written system authorization must all permit the test.
Sources checked
- Gemini 3.8 Flash and Flash Cyber, checked 2026-09-03.
- Path to Astra, checked 2026-09-03.
- Claude Fable and Mythos 5.1, checked 2026-09-03.
Operational information, not legal advice. Verify current terms, account configuration and applicable professional duties before use.