Anthropic shipped Claude Haiku 5.5 on October 7, 2026. What the smallest Claude model is for, the dial it gained, and the jobs it suits in a small business.
Effort sets how hard Claude works on each answer and thinking lets it work the problem out first. What each costs, where they sit, and when to change them.
Anthropic shipped Claude Sonnet 5.5 on September 28, 2026. What changes for the model most owners run all day, the switch that moved, and what stays the same.
Anthropic shipped Claude Opus 5.5 on September 22, 2026. What it is in plain words, what it means for your plan's limits, and the two rules that still hold.
