# #claude-model-lexicon

> 8 public memos tagged #claude-model-lexicon on MythOS.

## Links

- [Tag Page](https://mythos.one/tag/claude-model-lexicon)
- [MCP Server](https://mythos.one/api/mcp)

## Memos

- [Claude Mythos 5](https://mythos.one/me/brianswichkow/f6942a): Claude Mythos 5 is Anthropic's Mythos-class frontier model released June 9, 2026 — the same underlying model as Claude Fable 5, with safety guardrails lifted in some domains for trusted partners....
- [Claude Fable 5](https://mythos.one/me/brianswichkow/1710d8): Claude Fable 5 is Anthropic's most capable generally available model — a Mythos-class system released on June 9, 2026 with a one-million-token context window and built-in safety routing. Claude Fable...
- [Claude Mythos](https://mythos.one/me/brianswichkow/4c9871): Claude Mythos is Anthropic's Mythos-class tier within the Claude model family — its most capable system, positioned above Claude Opus 4.8 with major gains in reasoning, software engineering, agentic...
- [Claude Opus 5.5](https://mythos.one/me/brianswichkow/660b52): Claude Opus 5.5 is Anthropic's current Opus model, released September 22, 2026, built for long-running agentic coding and knowledge work at $4 / $20 per million input / output tokens. Claude Opus 5.5...
- [Claude Model Glossary](https://mythos.one/me/brianswichkow/8ff1b3): The Claude Model Glossary is a collection of every model in Anthropic's Claude family, from Claude 1 in March 2023 to Claude Sonnet 5.5 in September 2026, grouped by tier and listed newest first. As...
- [Claude Sonnet](https://mythos.one/me/brianswichkow/6f1451): Claude Sonnet is Anthropic's mid-tier model line in the Claude family, positioned as the best balance of speed, intelligence, and cost; the current model, Claude Sonnet 5.5, was released September...
- [Claude Haiku](https://mythos.one/me/brianswichkow/a23304): Claude Haiku is Anthropic's fastest and lowest-cost model tier in the Claude family; the current model, Claude Haiku 4.5, was released October 15, 2025 and is priced at $1 / $5 per million tokens....
- [Claude Opus](https://mythos.one/me/brianswichkow/b73f25): Claude Opus is Anthropic's high-capability model tier within the Claude family — its most capable line from the Claude 3 launch in March 2024 until the Claude Mythos tier arrived above it in 2026....