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 Sep 2, from our own stored daily snapshots. Reflects OpenRouter API demand only. See all models →
| Date | Prompt /MTok | Completion /MTok |
|---|---|---|
| 2026-07-29 | $1 → $0.5 | $5 → $2.5 |
| 2026-08-01 | $0.5 → $1 | $2.5 → $5 |
| 2026-08-07 | $1 → $0.5 | $5 → $2.5 |
Changes observed across 76 daily OpenRouter catalog snapshots since Jun 19, 2026.