Gacha

Soft Pity on Banners

By: vibe checker#5502 Added: 2021-06-03 Discussion
Finding: Soft pity is 74 on the featured character/standard banner, and 63 on the weapon banner.
The second link shows that the probability of rolling a 5 star massively increased on the 74th roll, as opposed to the 75th, and the third link shows that the probability for rolling a featured weapon on the weapon banner massively increased on the 63rd roll, not the 65th.
Significance: fixing misconceptions that soft pity is 75/65, allowing players to save their primogems more effectively

Estimated 5 star pulls for weapons/characters

By: KBphan#0001 Added: 2021-04-19
Finding: It takes approximately 12.5 5 star pulls to R5 a specific weapon
Average 5 stars pulled for specific rate up 5 star weapon:
  • r1 weapon (no pity) - 2.5
  • r1 weapon (with pity) - 2.25
  • r5 weapon (not starting with pity) - 12.5
  • r5 weapon (starting with pity) - 12.25
Average 5 stars pulled for rate up 5 star character
  • c0 character (no pity) - 1.5
  • c6 character (not starting with pity) - 10.5
  • c6 character (starting with pity) - 10
Evidence: I made a program to brute force 10,000,000 trials of attempting to R5 a specific rate up 5-star using the pity rules for the weapon banner. On average it will take a player 12.5 5-star pulls to R5 their desired weapon if they only want one of the rate up 5 star weapons. This leads to an average rate of 40% for a specific 5-star weapon on the rate up banner.
Significance: This information can be useful for whales to figure out around how many pulls they will need to get a specific R5 on average.

Resin Efficiency of Acquaint Fates from Character Levelling

By: Moonrobin#2608 Added: 2020-12-19
Finding: Level all characters to 20/40 for the Fate. From that point, getting them to 50/60 takes around 2 days of F2P resin budget. This is worth overall, as there are no other ways to convert Resin to rolls. I would treat the 70/80 Fate as a bonus rather than the goal. It costs 5 days worth of resin, which is probably not worth the expected rewards from a single roll.
Evidence: With the introduction of acquaint fates from character leveling in 1.2, it is now possible to convert resin to rolls. A question that many will have is how much does that Acquaint fate actually cost, in terms of resin investment. To answer this, I aggregated character leveling and ascension costs to hit the Fate thresholds. Note that this is for WL7 drop rates, and only includes permanent sources of materials (i.e. Event rates are not considered).
Significance: 20/40 is a no brainer for the Fate, do it now to get it out of the way. 20/40 to 50/60 is actually an investment of ~427.2 resin for the fate. 50/60 to 70/80 is 5 days worth of F2P resin budget. Consider if you have no other uses for resin.

Weapon banner Gacha Rates with Epitomized Path

By: Tim#5259, Mcpie#8672 Added: 2021-11-11 Discussion
Finding: Weapon banner gacha rates with Epitomized Path.
Evidence: Analytic solution, no pity: 1.984375 5* weapon rolls: Discord image Analytic solution, pity: 1.8125 5* weapon rolls: Discord image Monte-carlo verification: Pastebin
Significance: Expected 5* weapon rolls to desired 5* using epi path without pity at start: 1.984375 Expected 5* weapon rolls to desired 5* using epi path with pity at start: 1.8125 r5, epi path, no pity to start; expected num of weapons: 9.921875 r5, epi path, pity to start; expected num of weapons: 9.75
r1, no epi path, no pity: 2.5 r1, no epi path, pity: 2.25 r5, no epi path, no pity: 12.5 r5, no epi path, pity: 12.25

Number of Wishes on Weapon Banner to Fully Level a 5 Star Weapon

By: hanpw#5824 Added: 2021-12-16 Discussion
Finding: How many wishes on the weapon banner does it take to fully level a 5 star weapon to Level 90?
  • Using data from Genshin Wishes to get the 3 star, 4 star, and 5 star weapon rates, we can calculate that the average weapon EXP per wish is 10,597.30.
  • 5 star weapons need 9,064,450 total EXP to get to level 90, so the average number of wishes needed is 855.35.
Significance: Average number of wishes needed on weapon banner to level a 5 star weapon to 90 is 855 wishes.

Gacha Calculator

By: Tibo#4809 Added: 2022-02-19 Discussion
Finding 1: Statistical model for Genshin Impact's droprates.
Evidence: Source: Cgg and Genshin Wishes (posted with permission)
The soft-pity system starts at pull 74 (5* char), pull 63 (5* weapon) and at pull 9 (4*). At soft-pity, the drop rate increases with (the base rate * 10) every pull
For more details/graphs/data, see their HoYoLAB post
Significance: Better understanding of how the soft-pity system works.
Finding 2: Gacha rate calculator
Evidence: Based on this statistical model, I've made a rate calculator for a specific rate-up 5* char/weapon and 4* char.
Some percentile/pulls needed:
Item
50th Percentile
95th Percentile
99th Percentile
C0 of a rate-up 5* character
80
158
161
C6 of a rate-up 5* character
654
843
917
R1 of a rate-up 5* weapon
99
199
204
R5 of a rate-up 5* weapon
527
731
811
C0 of a rate-up 4* character
26
93
141
C6 of a rate-up 4* character
231
384
464
Small note with these calculations: to keep the amount of calculations/paths to explore down in the 4* char calcs, there's assumed to be no 5*'s to eat up/delay guaranteed 4* char. This will make the required 4* count slightly lower than needed. I've assumed that the difference is negligible.
Significance: Better budgeting/planning if users want to be X% sure to get char Y at CZ. Especially more useful for budgeting of higher constellations as averaging of low/high pity pulls. A calculator has the advantage that people can enter their current situation (pity/guaranteed).