Claude Haiku 4.5
Anthropic's fastest and most affordable model, designed for high-volume tasks and sub-agent workflows.
Quality
Modality
multimodal
Context
200K tokens
Access
closed
Fabian's Take
"Haiku isn't meant for writing poetry or solving hard math. It's meant to be a rapid-fire processor. I use it to parse messy text, summarize long documents quickly, and handle routine categorization."
Claude Haiku 4.5 is the lightweight speedster of the Claude family. It is optimized for low latency and high volume, making it the ideal choice for applications that need to process thousands of simple requests quickly.
How it compares
While you wouldn’t use Haiku to architect a complex application, it is perfect for the “connective tissue” of AI workflows. If an agent needs to quickly classify an incoming email, extract key entities from a contract, or format a messy CSV file, Haiku will do it instantly and for a fraction of the cost of Sonnet.
The Verdict
Best for: Data extraction, summarization, and rapid agentic tasks.
Pros
- Incredibly fast response times
- Very cheap API pricing
- Great for formatting and data extraction
Cons
- Struggles with complex reasoning
- Smaller context window than its siblings
Specs
- Pricing $1/M input, $5/M output
- Cost Tier budget
- ⚡Speed Tier instant
- License Proprietary
