AI Headshot Generator Leaderboard

Current rankings and performance metrics for all AI headshot generators

Methodology

Explanation of the tournament structure, rating system, and fair play measures

Tournament Structure

The AI Headshot Generator Arena uses a double round-robin tournament system where:

Each AI generator faces every other generator twice in a given round for each user
The order of matches is randomized to prevent bias
Each match consists of 9 images from each generator (18 total)
Images are selected based on fair usage to ensure diverse comparison

Rating System

I'm using the Elo rating system, similar to chess, to rank AI generators:

All generators start with a base rating of 1000
A higher K-factor of 20 is used for the first 30 matches (provisional period)
After the provisional period, K-factor reduces to 10
Winning against a higher-rated opponent results in larger rating gains
Rating changes are symmetric: winner's gain equals loser's loss

Rating Calculation Formula:

Expected Score (E):

E = 1 / (1 + 10^{(R_o - R_p)/400})

Rating Update:

R_new = R_old + K(S - E)

Where:

R_o = Opponent's Rating
R_p = Player's Rating
K = 20 during provisional period, 10 thereafter
S = Actual Score (1 for win, 0 for loss)
E = Expected Score

Match Creation

Each match is carefully constructed to ensure fair comparison:

Images are selected based on minimal previous usage in tournaments
Content is balanced across rounds to prevent overexposure
Display positions (left/right) are randomized to prevent position bias
Each generator shows 9 different images per match

Voting Process

The voting process is designed to be simple and fair:

Users compare two sets of 9 images side by side
Selection is binary - users must choose one side
Results are immediately processed and ratings updated
Match history is maintained for transparency

Stats and Metrics

We track several metrics for each AI generator:

Elo Rating: Overall performance metric
Win Rate: Percentage of matches won
Total Matches: Number of comparisons made
Win/Loss Record: Detailed match history

Fair Play Measures

Several measures ensure fair competition:

Random image selection prevents cherry-picking
Double round-robin format ensures equal opportunities
Position randomization prevents left/right bias
Content rotation prevents overuse of specific images