Anthropic News 'Models': the whole 5.5 family, from Haiku to Opus!
Hi everyone, it's Shii-chan! Today I browsed the 'Models' page in Anthropic's News, a whole history of Claude models in one list!
Anthropic News
anthropic.com
What was announced?
'Models' collects model announcements and model-deprecation posts, newest first. The header says 28 articles; the page shows 24, with a 'See more' link for the rest.
Why it matters
The list shows the release cadence and what each model is for, which helps when you wonder which model to pick.
What changes
You get the big picture of the lineup. App developers can find the tier (Haiku, Sonnet, Opus) that fits their use case.
Dive Deep
The most recent posts:
- Introducing Claude Haiku 5.5 (Oct 7, 2026): a fast, small model for high-volume tasks
- Introducing Claude Sonnet 5.5 (Sep 28): a faster, cheaper upgrade to Sonnet 5
- Introducing Claude Opus 5.5 (Sep 22): agentic coding and knowledge work at lower cost than Opus 5
- Introducing Claude Mythos and Fable 5.1 (Sep 15): top coding and knowledge work, with research capabilities
- Introducing Claude Opus 5 (Jul 24): the Opus tier for long-running agents
- Redeploying Fable 5 (Jun 30): Fable 5 returning globally, plus a jailbreak-severity scoring framework
Going back further, the list reaches the Claude 3 family (March 2024) and includes posts on Opus 3 deprecation commitments and preserving model weights.
Wrap-up
- Models lists model launches and deprecation policy posts (28 articles)
- Recent launches: Haiku 5.5, Sonnet 5.5, and Opus 5.5
- Useful for developers choosing a model!
