Creator of the Claude models, offered only as a hosted service through the Claude API and partner clouds.
0 recorded lineage links in this family.
1 recorded lineage link leaves this family, named on the release it belongs to.
No creator statement of what these 2 variant names mean is recorded for Claude 5.1.
Continues from Claude Fable 5 (Claude 5), recorded in another family and shown without a connector.
0 recorded lineage links in this family.
1 recorded lineage link leaves this family, named on the release it belongs to.
Creator positioning is recorded for 3 of the 4 variant names in Claude 5; the rest are marked as not recorded.
Opus tier — Anthropic states: For complex agentic coding and enterprise work
Sonnet tier — Anthropic states: The best combination of speed and intelligence
Fable tier — Anthropic states: Next-generation intelligence for long-running agents
Continues into Claude Fable 5.1 (Claude 5.1), recorded in another family and shown without a connector.
Mythos tier — no creator statement of what this name is for is recorded.
No recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for Claude 4.8.
No recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for Claude 4.7.
No recorded lineage links in this family, so no releases are connected here.
No creator statement of what this variant name means is recorded for Claude 4.6.
No recorded lineage links in this family, so no releases are connected here.
Creator positioning is recorded for the one variant name in Claude 4.5.
Haiku tier — Anthropic states: The fastest model with near-frontier intelligence
Families without a featured release are not drawn here. Every record in the catalog, featured or not, is listed in the model index and the Model Tree.
The organization's own surfaces, and the verification date these facts were last checked against them.
Every release recorded for Anthropic, current and legacy alike. Filter by lifecycle status; the choice is kept in the page address so it survives a reload or a shared link.
Showing all 10 releases.
Recorded lifecycle changes to this creator's releases, newest first. Each links to the release it changed and to the primary sources behind it.
Anthropic launched Claude Fable 5.1 and described it as generally available, on the Claude API, Amazon Bedrock, Claude Platform on AWS, Google Cloud and Microsoft Foundry.
Introducing Claude Fable 5.1 and Claude Mythos 5.1 · API release notes · Checked Sep 2, 2026
Anthropic launched Claude Mythos 5.1 on the Claude API alongside Claude Fable 5.1, for Project Glasswing participants. Anthropic describes it as available only through its trusted access programs rather than generally available.
Introducing Claude Fable 5.1 and Claude Mythos 5.1 · Claude Mythos 5.1 · API release notes · Checked Sep 2, 2026
The organization-level sources behind the summary above.
Anthropic | Checked Sep 11, 2026