---
title: "Claude Opus vs Sonnet vs Haiku: Which Should You Use?"
source: "OpenRouter：Announcements（RSS）"
source_tier: "t1"
url: "https://openrouter.ai/blog/insights/claude-opus-vs-sonnet-vs-haiku/"
permalink: "https://feed.astralor.com/items/itm_83f40a93c59f444315a67808"
published: "2026-10-30T00:00:00.000Z"
score: 56
channel: "tech"
tags: ["AI Agent","Anthropic","Claude Opus","Sonnet","Haiku","Which Should You","Use","Use Claude Sonnet"]
---

# Claude Opus vs Sonnet vs Haiku: Which Should You Use?

## At a glance

Use Claude Sonnet 5.5 as your default, Haiku 5.5 for high-volume and sub-agent work, and Opus 5.5 for long tasks where a mistake is costly. We compared the three on price, benchmarks, 11 coding tasks with hidden tests a…

## Key points

- Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5 compared on price, benchmarks and our own coding tests.
- All three passed every test; the costs differed 30x.

## Full text

Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5 compared on price, benchmarks and our own coding tests. All three passed every test; the costs differed 30x.

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