Pricing

Pick a plan. Spend it your way.

Credits land in your balance every month, Flex puts each request where it fits, and whatever you do not use stays yours.

Monthly plan
S
US$20/month
2,000 credits each month
Kick the tires. Wire up one agent and watch the balance breathe.
Request access
Monthly plan
M
Most popular
US$100/month
10,000 credits each month
The daily driver. Enough headroom for a team that ships every day.
Request access
Monthly plan
L
US$200/month
20,000 credits each month
For the heavy lifters. Long sessions, big repos, no hovering over the meter.
Request access
Monthly plan
XL
US$500/month
50,000 credits each month
Run the whole fleet. Room for agents that never really clock out.
Request access

Need more?

Credit packs come with checkout.

Once online checkout opens, packs top up the same balance and roll over like everything else.

Teams / enterprise

Bigger fleet, bigger plans.

Tell us what you are building and we will shape something that fits. Talk to us

Prices are in US dollars per month, before any applicable taxes. One credit is US$0.01 of Flex usage. Plan names and amounts are provisional. We give at least 30 days’ notice before a new plan price applies at your next renewal. Taxes may apply and are calculated at checkout.

MUSCLE Flex is an invite-only beta. Online checkout opens after the beta, so for now every plan starts with a request for access.

Pay for the work, not the ceiling.

Flex looks at each request and sends it where it fits. A quick edit should not cost what a deep refactor does.

Routed with intent

The costly way to run an agent is to send everything to the biggest model on the menu. Flex chooses a route for each request, so routine steps stay light on your balance and the heavy lifting goes to the work that needs it.

Lean toward savings or toward quality

Some jobs are about thrift and some are about getting it right. Flex lets you tilt the routing either way, so the balance follows what you care about today.

A balance that keeps its word

It is prepaid, so the number you see is the number you can spend. Flex holds credits before each request, keeps only what the request actually used, and shows every charge in the portal. Nothing happens behind your back.

How charging works.

Credits pay for Flex service usage, including the upstream work the selected route needs. The portal shows each charge and the remaining balance.

One credit is US$0.01

Credits are priced at US$0.01 each. Plan credits are added to one prepaid balance per account every paid month, and credit packs go into the same balance. Unused credits roll over and do not expire.

Metered in microcents, debited in whole cents

Each charged request is priced exactly in microcents (one credit is 1,000,000 microcents), following the usage the route reports. Flex debits whole cents as your accrued usage fills them and carries the remainder, always below one credit, to the next request. A request that costs a fraction of a credit is not rounded up.

Holds before routing

Before a charged request is routed, Flex holds credits against the most it could cost. Only the metered charge is kept when the request settles. With too few credits available, the request returns 402 before it reaches any route.

Some calls are never charged

Listing models, checking your account and counting tokens are free, and keep working when your balance is used up.

Checkout opens after the beta

There is no online checkout yet. Request access and the Flex team will set up your account. Credits you have not used stay yours.

The exact admission and metering rules are in the API reference.

Taxes and refunds.

Paddle.com is our merchant of record and handles taxes, receipts and refunds. Paddle handles order, billing and refund questions; Adhibita handles product support (see support). All purchases of plans and credits are final and non-refundable, except as the Refund Policy describes. Credits do not expire. The details are in the Terms and the Refund Policy. Questions: [email protected].

It is prepaid, so the number you see is the number you can spend.

How the balance works

Developers

Full quickstart

Endpoints, profiles and checks.

Questions

Billing, plainly.

Do I pay for a specific model?

No. You pay for Flex service usage.

No. You pay for Flex service usage. Adhibita manages the eligible routes behind muscle/auto, and the portal shows each resulting charge.

How do plans work?

Credits are added to your balance every paid month.

Each monthly plan adds its credits to your balance every paid month, and credits are spent as Flex does the work. Online checkout opens after the invite-only beta; until then, request access and we will set you up.

Do unused credits expire?

No. They roll over from month to month.

No. Unused credits roll over from month to month and do not expire.

What if I need more than my plan gives me?

Credit packs come with checkout.

Credit packs will go into the same balance and roll over the same way once online checkout opens. Until then, tell us how much you need when you request access.

Can Flex spend beyond my balance?

No. New work is declined when the balance cannot cover it.

Flex holds credits before routing a charged request and declines new work when the available balance cannot cover the largest possible cost. Set a smaller output allowance to keep that hold small.

Is a failed request charged?

Work the model did is charged. A failure caused by MUSCLE is free.

If the model did work before a request failed, you pay for that work, at the same rate as a successful request. If the failure was caused by MUSCLE, it is free: for example our own time limit, an unusable multi-step result, or our default output limit. Free failures at our limits are covered by a fair-use allowance for each account, so they cannot be used to get free usage. Safety screening, when enforced on your account, costs $0.0000135 per request. If your credits run out, requests pause until you top up; your account is not suspended for that. A refund that leaves a shortfall can suspend the account until we review it, and so can a chargeback or payment dispute, which does not change your credits by itself; see Terms §4.

What happens if my balance goes below zero?

Paid requests stop until you add credits that cover what you owe.

A charge reported after a request finished can take your balance below zero. Paid requests then stop until you add credits that cover what you owe. Usage alone does not suspend your account and we do not charge a card automatically. A refund that leaves a shortfall can suspend the account until we review it, and so can a chargeback or payment dispute, which does not change your credits by itself; see Terms §4.