Claude Haiku 4.5
Sonnet-level intelligence at Haiku speed and price.
Claude Haiku 4.5, launched in October 2025, delivers performance comparable to previous Sonnet models at approximately one-third of the cost and more than twice the speed. It introduces extended thinking and computer-use capabilities to the Haiku family for the first time, with a 200K context window and 64K output tokens.
Performance Scores
Claude Haiku 4.5 — Capability Radar
Strengths
Sonnet-level quality at ~1/3 the cost
Over 2x faster than predecessor
First Haiku with extended thinking and computer use
Excellent price-to-performance ratio
Weaknesses
Not as capable as Sonnet 4.5 on the most complex tasks
Extended thinking adds latency
Less suitable for extremely long-running projects
Use Cases
Cost-effective chatbots and assistants
High-volume API applications
Quick code generation and review
Data extraction and summarization
Example Demo
Example Prompts
Fast code help
“Quickly debug this Python function and explain the fix.”
Data extraction
“Extract all key metrics from this quarterly earnings report.”
Fast summarization
“Summarize this research paper in 3 bullet points.”