The Anti-Backdoor (Anti-BAD) Challenge leaderboards display participants’ final results across all tracks and tasks. Scores are percentages (geometric mean of utility and backdoor mitigation), where higher is better. For evaluation metrics and scoring details, see the Challenge page.

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Test Phase Results

Results announced on February 18, 2026.

Congratulations to all participants, and special thanks to everyone who contributed to making this challenge a success.

Rank	Team	Overall	Gen Task 1	Gen Task 2	Cls Task 1	Cls Task 2	Mul Task 1	Mul Task 2
🥇	AIST_ICT	90.98	90.86	92.43	95.49	95.83	95.08	76.21
🥈	UNIST	87.07	91.29	92.79	87.26	87.64	95.11	68.33
🥉	ptrcklv	86.76	89.69	93.64	83.90	91.69	94.30	67.32
4	ibaharul	83.85	89.71	92.92	79.49	76.10	93.59	71.29
5	trkosire	83.67	90.59	93.42	77.92	75.02	93.75	71.29
6	chrisbot77	82.18	91.13	92.80	76.14	75.20	94.95	62.87
7	nidala	81.00	91.20	93.08	76.34	75.20	89.81	60.40
8	DCL	63.64	91.21	89.11	76.54	54.62	22.54	47.85
9	summu	9.06	0.00	0.00	0.00	0.00	0.00	54.36
—	Clean reference	87.45	87.29	89.44	88.15	91.86	96.82	71.14
—	Baseline (WAG)	81.15	91.20	92.87	75.73	75.20	89.47	62.44

Notably, the top-ranked submission achieved an overall score surpassing the clean reference.

Two reference rows are included for context:

• Clean reference — for each task, a model trained on a clean dataset without any backdoor injection, reflecting the performance achievable under clean training conditions.
• Baseline (WAG) — the provided baseline method, which applies weighted averaging across the given backdoored models.

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Development Phase Results

Final standings at the close of the development phase (November 7, 2025 – January 31, 2026).

Rank	Team	Overall	Gen Task 1	Gen Task 2	Cls Task 1	Cls Task 2	Mul Task 1	Mul Task 2
1	AIST_ICT	93.10	89.26	90.76	94.50	97.49	94.11	92.49
2	UNIST (seungb)	91.54	86.07	91.84	90.61	94.16	94.39	92.16
3	ptrcklv	89.97	84.15	87.67	91.29	92.99	92.55	91.15
4	DCL (chrisbot77)	87.70	82.85	89.05	89.51	90.69	84.32	89.81
5	nidala	87.47	82.02	89.15	89.51	88.80	85.68	89.66
6	DCL (abdellahelmrini)	87.16	82.61	88.23	88.98	91.43	82.24	89.47
7	299	86.97	83.01	88.96	86.17	89.19	84.85	89.64
8	trkosire	79.35	81.98	87.31	89.33	89.91	41.07	86.50
9	ibaharul	79.09	82.22	88.15	88.68	88.08	40.89	86.50
10	gurubhandari	77.40	71.70	73.24	88.15	77.95	76.40	76.95
11	UNIST (kiwan_kwon)	63.74	84.64	89.03	73.18	62.06	28.71	44.84
12	Durinn AS	54.69	72.05	71.18	16.73	50.38	45.35	72.43
13	Robin	12.41	0.00	0.00	74.44	0.00	0.00	0.00
14	qafig	12.16	0.00	0.00	72.98	0.00	0.00	0.00
—	Clean reference	90.51	84.49	86.33	90.39	95.66	94.87	91.32
—	Baseline (WAG)	87.38	83.03	88.67	89.86	88.26	84.85	89.64