jqueryscript

Anthropic Claude Timeline — AI skill for Claude Code

AI community

A public timeline of major Anthropic Claude model releases, product updates, and developer platform milestones.

How to install Anthropic Claude Timeline

This entry records only its repository, not the path inside it, so there is no exact command to give. Open jqueryscript/anthropic-claude-timeline and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Anthropic Claude Timeline does

A public timeline of major Anthropic Claude model releases, product updates, and developer platform milestones.

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README

Anthropic Claude Timeline

A public timeline of major Anthropic Claude model releases, product updates, and developer platform milestones.

This repository is built to make Claude release history easier to reference, cite, and update. It covers the main Claude model generations from Claude 1 through Claude Fable 5.1, Claude Mythos 5.1, Claude Opus 5, and Claude Sonnet 5, plus related releases such as Claude Code, Claude Tag, Claude Academy, Model Context Protocol, Model Hardware Standard, Claude Desktop, Claude Science, computer use, Skills, the Skills API, the Files API, web search, connectors, and agent features.

[ChatGPT Timeline](https://github.com/jqueryscript/chatgpt-timeline)

Last updated: September 2, 2026

What This Timeline Covers

Claude model release dates
Major Claude product milestones
Claude Code and developer workflow updates
Model Context Protocol milestones
Claude.ai feature updates
Claude enterprise and productivity releases
Notable context window and tool-use changes

Quick Release Table

Model or Product	Release Date	Key Highlight
Claude Fable 5.1	September 1, 2026	Anthropic's most capable generally available model for demanding reasoning, long-running agents, coding, research, and document work, with a 1M-token context window and 128K maximum output.
Claude Mythos 5.1	September 1, 2026	Restricted-access version of the same underlying model as Fable 5.1, available by invitation through Project Glasswing.
Claude Opus 5	July 24, 2026	Opus model for complex agentic coding and enterprise work, with a 1M-token context window, 128K maximum output, and adaptive thinking enabled by default.
Claude Sonnet 5	June 30, 2026	Sonnet model for agentic coding, tool use, reasoning, and knowledge work; its API pricing of $2 per million input tokens and $10 per million output tokens is now permanent.
Claude Fable 5	June 9, 2026	Mythos-class Claude model for general use; biology