# Haiku 5.5 Pricing Explained

> An independent explainer of Claude Haiku 5.5 (released 2026-10-07, API ID claude-haiku-5-5): Anthropic's small model for high-volume work. Two-tier pricing: $0.10 per 1M input / $0.50 per 1M output tokens for prompts up to 100K tokens, $0.50/$2.50 above; cache reads $0.01/$0.05. First Haiku with an adjustable effort setting (adaptive thinking, defaults to medium). 1M token context, 128K max output, June 2026 cutoff, text and images in. Migration gotchas: non-default temperature/top_p/top_k return 400 errors, and the new tokenizer counts roughly 30% more tokens. Benchmarks: Anthropic claims 1620 Elo (GDPval-AA v2.1) and 72.4% (OSWorld 2.1) vs Haiku 4.5's 735 / 15.7%; independent Artificial Analysis run confirms Terminal-Bench 4.0 at 33% (Anthropic's table says 39.2%). Page includes a two-tier cost calculator comparing against Haiku 4.5 ($1/$5). Independent project, not affiliated with Anthropic. Updated 2026-10-09.