Brasileirão Série A: AI prediction accuracy, September 2026

Independently scored outcomes vs. the AI's published predictions. Updated each generation run.

Updated Oct 1, 2026

By Ivan Sirenko · Oct 1, 2026

45.2%

Correct outcomes

14 / 31

9.7%

Exact scores

3 / 31

Model comparison

Each AI model in our ensemble is scored independently against final results — the same matches, the same window.

Model	Predictions	Correct	Exact scores	Accuracy
claude-opus-5	21	10	2	47.6%
gpt-5	21	10	2	47.6%

Match by match

Date	Match	Predicted	Result	Verdict
Sep 2, 2026	CR Flamengo vs Mirassol FC	3:1	2:0	Outcome
Sep 5, 2026	Botafogo FR vs SE Palmeiras	1:2	0:0	Miss
Sep 5, 2026	RB Bragantino vs EC Bahia	1:1	2:3	Miss
Sep 5, 2026	SC Corinthians Paulista vs Chapecoense AF	2:1	1:2	Miss
Sep 5, 2026	Coritiba FBC vs Mirassol FC	2:1	1:2	Miss
Sep 5, 2026	Cruzeiro EC vs CA Paranaense	2:1	3:1	Outcome
Sep 5, 2026	Fluminense FC vs CR Vasco da Gama	2:0	1:0	Outcome
Sep 5, 2026	SC Internacional vs Santos FC	1:1	2:3	Miss
Sep 5, 2026	Clube do Remo vs CR Flamengo	1:2	0:1	Outcome
Sep 5, 2026	São Paulo FC vs CA Mineiro	1:1	2:0	Miss
Sep 5, 2026	EC Vitória vs Grêmio FBPA	1:1	1:0	Miss
Sep 12, 2026	SE Palmeiras vs São Paulo FC	2:1	2:0	Outcome
Sep 12, 2026	Santos FC vs Cruzeiro EC	1:1	2:1	Miss
Sep 12, 2026	CA Mineiro vs Fluminense FC	2:1	3:1	Outcome
Sep 12, 2026	EC Bahia vs Clube do Remo	2:1	2:1	Exact score
Sep 12, 2026	Botafogo FR vs RB Bragantino	1:1	1:1	Exact score
Sep 12, 2026	Chapecoense AF vs SC Internacional	1:1	1:2	Miss
Sep 12, 2026	Coritiba FBC vs CA Paranaense	1:1	3:3	Outcome
Sep 12, 2026	CR Flamengo vs SC Corinthians Paulista	2:0	2:1	Outcome
Sep 12, 2026	Grêmio FBPA vs CR Vasco da Gama	2:1	1:2	Miss
Sep 12, 2026	Mirassol FC vs EC Vitória	2:1	2:2	Miss
Sep 19, 2026	CA Paranaense vs EC Bahia	2:0	2:1	Outcome
Sep 19, 2026	CA Mineiro vs Chapecoense AF	2:1	1:1	Miss
Sep 19, 2026	SC Corinthians Paulista vs Fluminense FC	2:1	1:3	Miss
Sep 19, 2026	CR Flamengo vs RB Bragantino	2:0	2:1	Outcome
Sep 19, 2026	Grêmio FBPA vs SE Palmeiras	3:0	0:0	Miss
Sep 19, 2026	Mirassol FC vs Botafogo FR	2:0	2:0	Exact score
Sep 19, 2026	Clube do Remo vs Santos FC	3:0	1:2	Miss
Sep 19, 2026	São Paulo FC vs SC Internacional	1:2	1:0	Miss
Sep 19, 2026	CR Vasco da Gama vs Coritiba FBC	2:1	5:0	Outcome
Sep 19, 2026	EC Vitória vs Cruzeiro EC	2:0	1:3	Miss

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