The whole transaction
Rebirth has one requirement: the Cash price on the rebirth option. Paying it applies a permanent Cash multiplier that stays on no matter which pets, clones, or base tier you are using. The price is the only thing removed. Pets, eggs, clones, Speed, and upgrade levels stayed in every recorded run. A worked example used for this system: a 10,000 price while you hold 50,000 leaves 40,000.
The price climbs after every rebirth. In one early run the first price was 250 Cash and the player described the next as 20 million. Do not plan around those two numbers. Read the option you have now.
Multipliers players read out loud
| Run | Price that was spoken | Multiplier that was spoken |
|---|---|---|
| Early rebirth | 250 Cash | 2x |
| Same run, later | 20 million Cash | Not spoken |
| Mid-run chain | Not spoken | 16x, then 512x |
| Another chain | Not spoken | 32x, 64x, 512x, then 1,000x |
| Late option | 200 Robux instead of Cash | Not taken |
One chain ended with a total multiplier near 24,577, and the same player credited a pet jump to 1.9 quadrillion per second to the rebirths just taken. That pet number already includes multipliers. It is not a base rate you can copy onto a new account. Another late comment talked about 2,000x Cash. Nobody stated a numeric rebirth cap, even after a player said they had max rebirth.
The 200 Robux option appeared once, deep in a run, and was skipped. Every other documented rebirth was Cash. Do not assume Robux is required.
When to press it
Take it when the Cash price is covered and the next clone, treadmill, or base tier is not a small step away. Because surplus Cash survives, waiting is not a wipe. It only delays the permanent multiplier, and the next rebirth will cost more. Players in the recordings usually pressed it as soon as they could, with two exceptions: one opened a mythic snake egg first, and one bought an extra clone first because that button was also covered.
Base upgrades are the other large Cash multiplier. They stack with rebirth. Compare the two prices on your own screen. Exact per-level base multipliers have not been published.