# 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!

## 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!