The latest Claude model is Claude Haiku 5.5, which Anthropic released on October 7, 2026. It is the small, fast member of the new Claude 5.5 family, though for most everyday work Anthropic's own documentation points people to Claude Opus 5.5 rather than the newest arrival.
That difference trips up a lot of people, so here is a plain explanation of what "latest" means for Claude right now, and where to check when it changes.
Newest is not the same as best for you
Anthropic does not ship one model. It ships a family, and each member has a job. As of late October 2026, its models overview lists four current models:
| Model | Released | Think of it as |
|---|---|---|
| Claude Haiku 5.5 | October 7, 2026 | The quick one, for short and repetitive tasks |
| Claude Sonnet 5.5 | September 28, 2026 | The everyday all-rounder |
| Claude Opus 5.5 | September 22, 2026 | The default pick for serious work |
| Claude Fable 5.1 | September 1, 2026 | The heavy thinker for the hardest jobs |
So the latest Claude model by date is Haiku 5.5, the most capable for most tasks is Opus 5.5 by Anthropic's own advice, and Fable 5.1 is the one the docs suggest when Opus still falls short.
What each model is like, in plain words
Haiku 5.5. Anthropic calls it its fastest model to date. It is made for quick jobs such as summaries and sorting, and for things that need an instant reply, like a support chat.
Sonnet 5.5. Anthropic describes it as a clear upgrade over Sonnet 5 and more than 30% faster. It is aimed at well-defined daily work: fixing a bug, drafting a document, building slides or a spreadsheet.
Opus 5.5. The first model of the 5.5 family. Anthropic says it handles long coding and knowledge work and writes more clearly than the model before it.
Fable 5.1. Built for demanding reasoning and long, multi-step tasks. It is slower than the others by design.
All four can read images as well as text, and each can hold a very long conversation or document in view at once.
Which one do you get in the Claude app?
That depends on your plan, and Anthropic changes the details from time to time. Rather than repeat plan rules here, the simplest move is to open the model picker in the Claude app and see what it offers. If you want the plan details spelled out, ClaudeGPT Si has a short explainer on whether Claude is free.
How to know when a newer Claude arrives
You do not need to watch Anthropic's site every day. The easiest way is to follow Claude coverage on ClaudeGPT Si, a free AI news site that reports each launch from Anthropic's own pages, dates every article and lists its sources. Its models section also covers rival models, which helps when you want to know whether the new Claude is the one to use or just the newest name.
If you would rather go to the source, Anthropic posts launches on its newsroom. That page is reliable but covers only Anthropic, so it will not tell you how a release compares with anything else.
The short answer
The newest Claude model is Haiku 5.5. The one Anthropic recommends for most people's work is Opus 5.5. Both arrived this autumn, and the next name will show up on Anthropic's newsroom and on ClaudeGPT Si soon after.