Honest, up-to-date guides on what each provider's native spend limits really do — and how to cap your bill per agent, in real time, before a runaway does it for you.
Why agents cost 10–100× a single chat call — the token multipliers, a worked example, the hidden cost drivers, and how to keep the bill under control. The big picture before you dig into any one provider.
Claude's per-workspace and per-user monthly limits are genuinely good — but they're monthly, per-user not per-agent, and their own docs call the spend reading "informational, not transactional." Here's how to close the gap.
Gemini now has a mandatory monthly spend cap — but it's account-wide, tier-sized, and lets up to 10 minutes of overage through. What it protects, and how to add a per-agent, real-time stop.
xAI's prepaid credits and monthly invoiced limit are a real backstop — but they're account-wide, and auto top-up can quietly refill the "hard" floor. How to cap per-agent, at your number, in real time.
DeepSeek is cheap, but its only native control is your prepaid balance — one shared number, no per-agent limits, no alerts. How to add real-time per-agent budgets before a loop empties it.
GroqCloud has a real monthly spend limit with 50/75/90% alerts — but it's organization-wide, so one runaway blocks every key at once, and unblocking production unblocks the runaway too. How to cap per-agent instead.
Mistral gives you org and per-workspace monthly caps — among the better native controls. But per-workspace isn't per-agent unless you split every bot into its own workspace. How to close that gap.
OpenAI's built-in limit is delayed up to 24 hours and applies to your whole account. Why that isn't enough, and the approaches that actually stop a runaway call.
Estimate your monthly bill across 15 models by tokens — and see what a runaway loop could cost before anyone notices.
TokenBrake meters every AI call in real time, per agent, and hard-stops a runaway at your budget — across OpenAI, Claude, Gemini, Grok, Groq, DeepSeek, Mistral, and OpenRouter. Self-hosted, one line to install.
See pricing — from $99/yr →