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UFC 320: Ankalaev vs. Pereira 2Women's BantamweightPrelims
Macy Chiasson
Macy
Chiasson
8-4UFC
34 yrsElo 1549
VS
Yana SantosWINNER
Yana
Santos
6-5UFC
35 yrsElo 1524
Final: Yana Santos by U-DEC
Who wins
Claude
65%
Chiasson
GPT
68%
Chiasson
Elo
54%
Chiasson
1549 vs 1524
Tale of the tapeUFC averages
5'11" Height 5'6"
72" Reach 68"
Orthodox Stance Orthodox
3.77 Landed / min 4.42
2.79 Absorbed / minlower better 3.12
46% Strike accuracy 58%
44% Strike defense 50%
2.37 Takedowns / 15 0.97
38% TD accuracy 53%
70% TD defense 42%
0.4 Subs / 15 0.1
How it ends
Claude: KO/TKO 30%Claude: Submission 20%Claude: Decision 50%
50%Decision
Claude calls Decision
KO/TKO 30%Submission 20%Decision 50%
GPT: KO/TKO 10%GPT: Submission 15%GPT: Decision 75%
75%Decision
GPT calls Decision
KO/TKO 10%Submission 15%Decision 75%
Formnewest first
Macy Chiasson126 days out
L
Ketlen Vieira
U-DEC · 2025-05-31
W
Pannie Kianzad
SUB · 2024-03-16
W
Mayra Bueno Silva
KO/TKO · 2024-01-27
L
Irene Aldana
KO/TKO · 2022-09-10
W
Norma Dumont
S-DEC · 2022-05-07
Yana Santos154 days out
W
Miesha Tate
U-DEC · 2025-05-03
W
Chelsea Chandler
U-DEC · 2024-03-02
L
Karol Rosa
S-DEC · 2023-07-01
L
Holly Holm
U-DEC · 2023-03-25
L
Irene Aldana
KO/TKO · 2021-07-10
Why
Claude
Macy Chiasson
65% · Decision
  • Chiasson's 5-inch height and 4-inch reach advantage creates striking leverage
  • 3-fight finish streak shows Chiasson's improved finishing ability
  • Superior wrestling with 2.37 takedowns per fight vs Santos' 42% TDD
  • Chiasson's 70% TDD can stuff Santos' limited wrestling attempts (0.97 per fight)
Write-up

Chiasson's recent finishing streak (2 KO/TKOs, 1 submission in last 3 wins) shows improved killer instinct. Her 5-inch height and 4-inch reach advantages are significant at 135 pounds. While Santos has better striking volume (4.42 vs 3.77 SLPM), Chiasson's superior grappling (2.37 takedowns vs 0.97) and 70% takedown defense should control positioning. Common opponent analysis favors Santos, but Chiasson's recent improvements suggest she's evolved past those performances.

GPT
Macy Chiasson
68% · Decision
  • Chiasson's clear grappling advantage and higher takedown output
  • Santos' low takedown defense against a strong wrestler
  • Relatively low finishing rates for both fighters indicating likely decision
Write-up

Chiasson's superior takedown offense (2.37 TD avg, 38% accuracy) and strong takedown defense (70%) should allow her to dictate where the fight takes place. While Santos is the more accurate and higher-volume striker, her takedown defense is a significant liability (42%), making her susceptible to Chiasson's grappling. Both fighters have low finishing rates, making a decision likely.