Claude Haiku 5.5

A compact Claude model for fast, high-volume work

The overview

What is Claude Haiku 5.5?

Claude Haiku 5.5 is Anthropic’s small, fast language model for high-volume tasks such as summarization, classification, coding subagents, customer support, and browser use. Developers can access it through the Claude API, while Claude’s consumer plans provide a separate way to use the model in the assistant. The model page describes its focus on balancing speed, capability, and cost.

Around the internet

What people are saying

Public experiences, questions, and discussions.

Escobar747ClaudeCode

Is Haiku 5.5 good enough to be your main coding agent, not just the cheap one? I ran a small controlled test

I tested Claude Haiku 5.5 at low, medium and high effort against Sonnet 5.5 (medium), GPT-6 Luna (high) and GPT-6.1 Sol (medium).

Inside the toolkit

Key features

Fast model for high-volume tasks

Anthropic positions Haiku 5.5 for high-volume work where speed and cost efficiency matter.

Adjustable effort controls

Haiku 5.5 is the first Haiku with effort controls, allowing teams to tune cost against intelligence for each task.

Text processing and real-time experiences

Anthropic lists classification, summarization, text generation, chat, voice agents, live support, and in-app assistants.

Agent and automation tasks

The page describes Haiku 5.5 for defined subagent work, repetitive computer use, focused coding, and multi-step tool use.

Availability through Claude and cloud providers

Anthropic lists Claude and cloud-provider access for Haiku 5.5.

Where it fits

Use cases

Summarize and classify large volumes of textThe official page names high-volume summarization, classification, and text generation.
Build latency-sensitive conversationsThe page lists chat, voice agents, live support, and in-app assistants as real-time use cases.
Delegate a defined subtask to an agentA larger model can plan work and hand a well-defined coding or information-processing task to Haiku.
Automate repetitive browser or desktop workAnthropic names form filling, data entry, and moving information between apps.

Keep exploring