Claude Haiku 5.5 is out. Cheapest and fastest small model Anthropic has shipped, around 75% cheaper than 4.5 on average. Under 100K tokens it's $0.1 in, $0.5 out, so 90% off. Context up from 200K to 1M, 128K output, and effort levels for the first time with five settings. OSWorld jumped from 15.7% to 72.4%, Terminal-Bench went from zero to 39.2%. Made for subagents. Ran it myself, burns fewer tokens than DeepSeek v4.1-flash, speed feels about the same.
Claude Haiku 5.5 is out