# Anthropic publishes a guide to choosing among Claude models

> Original title: Which Claude model should you build with?

- Source: ClaudeDevs
- Published: 2026-11-09T21:03:27.000Z
- Bad Influence: https://badinfluence.news/items/ombj0erejmmdsex6878irbbgz
- Original: https://x.com/ClaudeDevs/status/2119898687803621427

## Summary

Anthropic publishes a guide on which Claude model to build with, covering Fable 5.2, Opus 5.5, Sonnet, and Haiku. The guide also explains when to adjust effort instead of switching models and how to lower costs by running subagents on smaller models.

## Post

Which Claude model should you build with? 

Our new guide breaks down when to use Fable 5.2, Opus 5.5, Sonnet or Haiku. It also covers when to adjust effort instead of switching models, and how to save cost by putting subagents on smaller models.

https://claude.dev/blog/which-claude-model-should-you-build-with