What changed
Kiro Pro Max costs $100 a month and includes 5,000 credits, two and a half times Pro+, with all premium models and features including specs, custom subagents, powers and hooks. You switch from account settings; mid-cycle upgrades are prorated and the new credits apply right away.
Who it affects
Individual Kiro users who regularly run out of Pro+ credits.
What to do
If you keep exceeding Pro+, compare Pro Max with your add-on spend; upgrades are prorated.
Source: https://kiro.dev/changelog/general/introducing-kiro-pro-max/