Claude Haiku 4.5
used in
4
stacks
Fast, cheap small model for classification, routing, high-volume work.
Haiku 4.5 covers the cost-sensitive end. Common uses: intent classification, lightweight tool-use loops, fallback tier in routed setups, worker agents in multi-agent systems.
Strengths
- Lowest cost in Claude family
- Low latency suitable for real-time interactions
- Strong instruction-following for its size
Tradeoffs
- Weaker on complex reasoning vs Sonnet/Opus
- Lower context window than Sonnet