Claude Haiku 4.5 is Anthropic fastest and most affordable model, delivering 90% of Sonnet capability at a fraction of the cost. At $0.80/$4 per MTok, Haiku is ideal for high-volume applications, pair programming assistants, and worker agents in multi-agent systems. It supports a 200K context window and maintains Anthropic safety-first design principles.
| Benchmark | Score |
|---|---|
| Arena Elo (LMArena) | 1320 |
| Context Window | 200K |
| Price (input/output) | $0.80/$4 |
Daily tokens (prompt + completion) routed to Claude Haiku 4.5 on OpenRouter, from Jun 20 to Jul 19, from our own stored daily snapshots. Reflects OpenRouter API demand only. See all models →
Unchanged since Jun 19, 2026 across 31 daily OpenRouter catalog snapshots.