Anthropic launches Claude Haiku 5.5: $0.10 per million tokens, 1M context

Anthropic released Claude Haiku 5.5 on October 7, 2026 — its cheapest and fastest model at $0.10/$0.50 per million tokens for prompts up to 100K, with a 1M-token context and adaptive thinking. Benchmarks show a large jump over Haiku 4.5 (OSWorld 72.4% vs 15.7%, Terminal-Bench 39.2% vs 0%), though it trails Sonnet 5.5's 70.6% on Terminal-Bench.

• Pricing: $0.10/$0.50 per 1M tokens up to 100K prompt, $0.50/$2.50 above it
• 1M-token context with adaptive thinking and adjustable effort
• OSWorld 2.1: 72.4% vs Haiku 4.5's 15.7%; Terminal-Bench: 39.2% vs 0%
• 20x cheaper than Sonnet 5.5 and 40x cheaper than Opus 5.5 per token class