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Claude Model Comparison 2026: Haiku vs Sonnet vs Opus

This story is from 2026-09-09. It is preserved in the archive; the latest stories are on the live feed.

Originally published at kalyna.pro Anthropic's current lineup — Haiku 4.5 , Sonnet 5 , Opus 5 , and Fable 5.1 — covers a 20× cost range from the cheapest token to the most powerful. This guide walks through every model in the Claude 5 family, shows you how to call each one in Python, and ends with…

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  1. 2026-09-09 14:39 · DEV Community — AI
    Claude Model Comparison 2026: Haiku vs Sonnet vs Opus

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