Native-Bird x SigLIP image-text alignment: full run (2026-10-18, 1x H100)

Test = 809 held-out images; gallery = every test caption in that language (eng 809, ibo 751, hau 769, yor 764). Chance R@1 ~0.13%. Best checkpoint by val mean R: native_bird (frozen text), epoch 3 (val 60.46) vs unfreeze-top-2 epoch 2 (val 60.35): a near tie.

run	lang	i2t R@1	i2t R@5	i2t R@10	t2i R@1	t2i R@5	t2i R@10	mean R
untrained heads	eng	0.37	1.11	1.48	0.12	0.87	1.73	0.95
untrained heads	ibo	0.0	0.8	2.4	0.13	0.8	1.6	0.96
untrained heads	hau	0.26	0.78	1.69	0.13	1.04	1.69	0.93
untrained heads	yor	0.26	0.92	2.36	0.26	0.92	1.05	0.96
mCLIP zero-shot	eng	58.34	84.67	92.21	57.85	83.31	89.99	77.73
mCLIP zero-shot	ibo	6.13	14.38	20.91	4.26	11.98	16.11	12.29
mCLIP zero-shot	hau	3.38	6.63	8.71	1.82	4.16	6.11	5.13
mCLIP zero-shot	yor	2.36	4.84	6.41	1.31	2.75	4.84	3.75
Native-Bird frozen	eng	46.48	77.38	88.5	44.99	76.64	87.02	70.17
Native-Bird frozen	ibo	39.28	70.71	82.29	39.01	69.64	81.49	63.74
Native-Bird frozen	hau	33.16	61.64	74.64	32.25	59.43	74.9	56.0
Native-Bird frozen	yor	25.52	53.8	64.66	23.56	52.75	65.84	47.69
Native-Bird unfreeze top-2	eng	44.99	78.74	89.0	46.23	76.14	87.89	70.5
Native-Bird unfreeze top-2	ibo	37.95	70.57	83.49	39.68	70.17	83.36	64.2
Native-Bird unfreeze top-2	hau	31.73	60.47	74.9	30.3	60.73	74.38	55.42
Native-Bird unfreeze top-2	yor	23.3	52.88	64.66	24.87	53.27	64.4	47.23
frozen, test_unfiltered	eng	46.48	77.38	88.5	44.99	76.64	87.02	70.17
frozen, test_unfiltered	ibo	36.59	67.37	79.6	35.6	66.75	79.23	60.86
frozen, test_unfiltered	hau	31.52	59.21	72.06	30.9	57.73	72.81	54.04
frozen, test_unfiltered	yor	24.6	52.78	63.54	22.5	51.79	64.4	46.6
unfreeze-2, test_unfiltered	eng	44.99	78.74	89.0	46.23	76.14	87.89	70.5
unfreeze-2, test_unfiltered	ibo	35.72	67.86	81.09	36.96	67.12	80.22	61.5
unfreeze-2, test_unfiltered	hau	29.91	58.71	73.05	28.31	58.22	72.44	53.44
unfreeze-2, test_unfiltered	yor	22.74	50.31	62.42	23.98	52.41	62.79	45.77

Smoke (CPU, 128 images, 1 epoch, mean R): untrained 4.6/3.5/2.8/5.3, mCLIP 92.3/22.5/7.7/6.8, trained Native-Bird 42.1/42.4/38.2/33.9 (eng/ibo/hau/yor). Not comparable to the 809-image gallery.

Igbo image search (best checkpoint, 809 test images)

All 751 held-out Igbo captions as queries: hit@1 37.42, hit@5 68.44, hit@10 80.56, median rank 2. English: hit@1 44.99, hit@5 76.64, hit@10 87.02.

Igbo query	English	Igbo top-5	top-5 overlap with English query
Nkịta na-agba ọsọ n'elu ahịhịa	A dog running on the grass	697582336_601462e052.jpg, 2114739371_83aa8bdb0e.jpg, 1514957266_a19827c538.jpg, 240583223_e26e17ee96.jpg, 3358380484_b99b48f0c9.jpg	3/5
Ụmụaka na-egwu egwu n'ime mmiri	Children playing in the water	1095476286_87d4f8664e.jpg, 3041689520_c481bdb20e.jpg, 2951092164_4940b9a517.jpg, 3545427060_c16a8b7dfd.jpg, 3747543364_bf5b548527.jpg	5/5
Otu nwoke na-agba ịnyịnya ígwè	A man riding a bicycle	3649916507_b88a3d2082.jpg, 3391924827_53b31542ce.jpg, 3079073247_97e88e2eb7.jpg, 3665169936_01ae94c9fd.jpg, 2192411521_9c7e488c5e.jpg	4/5
Otu nwanyị yi uwe na-acha uhie uhie	A woman wearing a red dress	495055747_a75872762a.jpg, 613900608_2e49415772.jpg, 3534952095_975cca0056.jpg, 2695085448_a11833df95.jpg, 1821238649_2fda79d6d7.jpg	4/5
Ndị mmadụ nọ n'elu ugwu	People on top of a mountain	2176980976_7054c99621.jpg, 3340575518_137ce2695f.jpg, 1428578577_82864facae.jpg, 3229821595_77ace81c6b.jpg, 95783195_e1ba3f57ca.jpg	4/5
Otu nwata nwoke na-awụli elu	A boy jumping in the air	3348811097_0e09baa26f.jpg, 2061354254_faa5bd294b.jpg, 3229913073_e7857a5966.jpg, 3741827382_71e93298d0.jpg, 3396036947_0af6c3aab7.jpg	3/5
Nkịta abụọ na-egwu egwu	Two dogs playing together	3473534758_1ae3847781.jpg, 522486784_978021d537.jpg, 78984436_ad96eaa802.jpg, 255741044_1102982213.jpg, 3264678536_46601d25f0.jpg	2/5
Ọtụtụ mmadụ nọ n'okporo ụzọ	A crowd of people on a street	3638374272_444f5e0457.jpg, 256444892_efcb3bd824.jpg, 3225037367_a71fa86319.jpg, 3433470650_a8b1c27173.jpg, 1685990174_09c4fb7df8.jpg	4/5

held-out Igbo caption	English reference	GT rank	in top-5
Ndị ikom abụọ na-egwuri egwu na egwuregwu egwuregwu ọnụ .	Two men are playing in a sports game together .	8	no
A isi awọ agba nkịta na-eje ije na mmiri ájá na a osimiri .	A grey colored dog walks in wet sand at a beach .	14	no
Nkịta na-ejide Frisbee na ndị na-ekiri ya na ndabere .	A dog catching a Frisbee with onlookers in the background .	3	yes
Ụmụ agbọghọ abụọ na-acha odo odo na-egwuri egwu ọnụ .	Two blond girls are playing together .	1	yes
Nkịta na-awakpo nwoke yi ngwá ọrụ nchebe .	A dog attacking a man wearing protective gear .	3	yes
Nkịta ojii na aja aja na-agba ọsọ gafee ahịhịa.	A black and brown dog running across the grass .	4	yes