Guides
Subscription versus API billing for agents
Compare workflow limits and predictability, not incompatible headline units.
A concise editorial guide, not a universal recommendation or guarantee.
Decision rule
Subscriptions can make spend predictable but often use rolling message or weekly limits. APIs expose token prices and support routing, yet require budget alerts. Do not convert messages into tokens without provider evidence. Test one normal week before choosing.
Practical checklist
- Record limits after one representative week.
- Set an API budget alert.
Sources checked
These first-party or authoritative sources ground the note. Checked 2026-08-16.