GPT-5.6 Luna

OpenAI·Jul 9, 2026·5 reasoning variants

GPT-5.6 Luna is the budget tier of the GPT-5.6 family and is was effectively non-functional against ARC-AGI-3. It scores 0% on Public and 0.18% on Semi-Private. Like Terra it fails to benefit from extra effort — Luna `xhigh` is essentially flat with `high`.

Related models: GPT-5.6 Sol, GPT-5.6 Terra

ARC-AGI 3 leaderboard

GPT-5.6 Luna

Verified scores

Variant	ARC-AGI-1	ARC-AGI-2	ARC-AGI-3
Max	88.0%	59.5%	0.2%
Extra High	87.7%	47.6%	0.0%
High	76.5%	29.3%	0.1%
Medium	56.5%	7.4%	0.2%
Low	34.2%	5.1%	0.2%

Tasks & environments

Pass/fail per reasoning level across each benchmark. Hardest tasks (fewest levels solving) are listed first.

ARC-AGI-3 Public Demo

25 environments


AR25	0%	0%	0%	0%	0%
BP35	0%	0%	0%	0%	0%
CD82	0%	0%	0%	0%	0%
CN04	0%	0%	0%	0%	0%
DC22	0%	0%	0%	0%	0%
FT09	0%	0%	0%	0%	0%
G50T	0%	0%	0%	0%	0%
KA59	0%	0%	0%	0%	0%
LF52	0%	0%	0%	0%	0%
LS20	0%	0%	0%	0%	0%
M0R0	0%	0%	0%	0%	0%
R11L	0%	0%	0%	0%	0%
RE86	0%	0%	0%	0%	0%
S5I5	0%	0%	0%	0%	0%
SB26	0%	0%	0%	0%	0%
SC25	0%	0%	0%	0%	0%
SK48	0%	0%	0%	0%	0%
SP80	0%	0%	0%	0%	0%
SU15	0%	0%	0%	0%	0%
TN36	0%	0%	0%	0%	0%
TR87	0%	0%	0%	0%	0%
TU93	0%	0%	0%	0%	0%
VC33	0%	0%	0%	0%	0%
WA30	0%	0%	0%	0%	0%
LP85	0%	0%	0%	1%	0%

ARC-AGI-2 Public Eval

120 tasks

Task	Max	Extra High	High	Medium	Low
135a2760	✗	✗	✗	✗	✗
13e47133	✗	✗	✗	✗	✗
16b78196	✗	✗	✗	✗	✗
195c6913	✗	✗	✗	✗	✗
21897d95	✗	✗	✗	✗	✗
221dfab4	✗	✗	✗	✗	✗
269e22fb	✗	✗	✗	✗	✗
271d71e2	✗	✗	✗	✗	✗
28a6681f	✗	✗	✗	✗	✗
2b83f449	✗	✗	✗	✗	✗
3a25b0d8	✗	✗	✗	✗	✗
446ef5d2	✗	✗	✗	✗	✗
4c3d4a41	✗	✗	✗	✗	✗
4c7dc4dd	✗	✗	✗	✗	✗
4e34c42c	✗	✗	✗	✗	✗
5545f144	✗	✗	✗	✗	✗
581f7754	✗	✗	✗	✗	✗
5961cc34	✗	✗	✗	✗	✗
62593bfd	✗	✗	✗	✗	✗
64efde09	✗	✗	✗	✗	✗
6e4f6532	✗	✗	✗	✗	✗
71e489b6	✗	✗	✗	✗	✗
7b0280bc	✗	✗	✗	✗	✗
7b80bb43	✗	✗	✗	✗	✗
800d221b	✗	✗	✗	✗	✗
88bcf3b4	✗	✗	✗	✗	✗
88e364bc	✗	✗	✗	✗	✗
8b7bacbf	✗	✗	✗	✗	✗
8e5c0c38	✗	✗	✗	✗	✗
9bbf930d	✗	✗	✗	✗	✗
a251c730	✗	✗	✗	✗	✗
a25697e4	✗	✗	✗	✗	✗
a32d8b75	✗	✗	✗	✗	✗
aa4ec2a5	✗	✗	✗	✗	✗
abc82100	✗	✗	✗	✗	✗
b10624e5	✗	✗	✗	✗	✗
b9e38dc0	✗	✗	✗	✗	✗
c7f57c3e	✗	✗	✗	✗	✗
cbebaa4b	✗	✗	✗	✗	✗
da515329	✗	✗	✗	✗	✗
dbff022c	✗	✗	✗	✗	✗
de809cff	✗	✗	✗	✗	✗
e12f9a14	✗	✗	✗	✗	✗
e3721c99	✗	✗	✗	✗	✗
e87109e9	✗	✗	✗	✗	✗
faa9f03d	✗	✗	✗	✗	✗
247ef758	✗	✗	✓	✗	✗
2c181942	✗	✓	✗	✗	✗
2d0172a1	✓	✗	✗	✗	✗
332f06d7	✓	✗	✗	✗	✗
35ab12c3	✓	✗	✗	✗	✗
3dc255db	✓	✗	✗	✗	✗
3e6067c3	✓	✗	✗	✗	✗
5dbc8537	✓	✗	✗	✗	✗
65b59efc	✓	✗	✗	✗	✗
67e490f4	✗	✗	✓	✗	✗
6ffbe589	✓	✗	✗	✗	✗
78332cb0	✓	✗	✗	✗	✗
7ed72f31	✗	✓	✗	✗	✗
8698868d	✗	✓	✗	✗	✗
89565ca0	✗	✗	✓	✗	✗
9385bd28	✓	✗	✗	✗	✗
9aaea919	✗	✓	✗	✗	✗
a6f40cea	✓	✗	✗	✗	✗
b5ca7ac4	✗	✓	✗	✗	✗
b6f77b65	✗	✓	✗	✗	✗
d35bdbdc	✓	✗	✗	✗	✗
d8e07eb2	✓	✗	✗	✗	✗
db0c5428	✗	✓	✗	✗	✗
dd6b8c4b	✓	✗	✗	✗	✗
edb79dae	✓	✗	✗	✗	✗
0934a4d8	✓	✓	✗	✗	✗
142ca369	✓	✓	✗	✗	✗
16de56c4	✓	✓	✗	✗	✗
20a9e565	✓	✓	✗	✗	✗
36a08778	✓	✓	✗	✗	✗
38007db0	✓	✓	✗	✗	✗
4a21e3da	✓	✓	✗	✗	✗
4c416de3	✓	✓	✗	✗	✗
7666fa5d	✓	✓	✗	✗	✗
7b3084d4	✓	✓	✗	✗	✗
7c66cb00	✓	✓	✗	✗	✗
80a900e0	✓	✓	✗	✗	✗
898e7135	✓	✓	✗	✗	✗
8b9c3697	✓	✓	✗	✗	✗
8f215267	✓	✓	✗	✗	✗
a47bf94d	✓	✓	✗	✗	✗
b0039139	✓	✗	✓	✗	✗
c4d067a0	✓	✓	✗	✗	✗
cb2d8a2c	✓	✓	✗	✗	✗
d59b0160	✓	✓	✗	✗	✗
dfadab01	✓	✓	✗	✗	✗
eee78d87	✓	✓	✗	✗	✗
f560132c	✓	✓	✗	✗	✗
f931b4a8	✓	✗	✓	✗	✗
fc7cae8d	✓	✓	✗	✗	✗
1818057f	✓	✓	✓	✗	✗
20270e3b	✓	✓	✓	✗	✗
291dc1e1	✓	✓	✓	✗	✗
31f7f899	✓	✓	✓	✗	✗
409aa875	✓	✓	✓	✗	✗
45a5af55	✓	✓	✓	✗	✗
58f5dbd5	✓	✓	✓	✗	✗
6e453dd6	✓	✓	✓	✗	✗
7491f3cf	✓	✓	✓	✗	✗
7b5033c1	✓	✓	✓	✗	✗
8f3a5a89	✓	✓	✓	✗	✗
97d7923e	✓	✓	✓	✗	✗
981571dc	✓	✓	✓	✗	✗
a395ee82	✓	✓	✓	✗	✗
b99e7126	✓	✓	✓	✗	✗
db695cfb	✓	✓	✓	✗	✗
e376de54	✓	✓	✓	✗	✗
e8686506	✓	✓	✓	✗	✗
136b0064	✓	✓	✓	✓	✗
1ae2feb7	✓	✓	✓	✓	✗
bf45cf4b	✓	✓	✓	✓	✗
2ba387bc	✓	✓	✓	✓	✓
53fb4810	✓	✓	✓	✓	✓
58490d8a	✓	✓	✓	✓	✓

ARC-AGI-1 Public Eval

400 tasks

Task	Max	Extra High	High	Medium	Low
0d87d2a6	✗	✗	✗	✗	✗
16b78196	✗	✗	✗	✗	✗
2546ccf6	✗	✗	✗	✗	✗
256b0a75	✗	✗	✗	✗	✗
3ed85e70	✗	✗	✗	✗	✗
4b6b68e5	✗	✗	✗	✗	✗
50f325b5	✗	✗	✗	✗	✗
551d5bf1	✗	✗	✗	✗	✗
5b692c0f	✗	✗	✗	✗	✗
891232d6	✗	✗	✗	✗	✗
aa4ec2a5	✗	✗	✗	✗	✗
ac2e8ecf	✗	✗	✗	✗	✗
b9630600	✗	✗	✗	✗	✗
d94c3b52	✗	✗	✗	✗	✗
da515329	✗	✗	✗	✗	✗
e681b708	✗	✗	✗	✗	✗
f3b10344	✗	✗	✗	✗	✗
fd096ab6	✗	✗	✗	✗	✗
05a7bcf2	✓	✗	✗	✗	✗
0607ce86	✗	✓	✗	✗	✗
08573cc6	✗	✓	✗	✗	✗
15113be4	✗	✗	✓	✗	✗
18419cfa	✗	✓	✗	✗	✗
1acc24af	✗	✗	✗	✗	✓
2037f2c7	✓	✗	✗	✗	✗
31adaf00	✗	✓	✗	✗	✗
40f6cd08	✓	✗	✗	✗	✗
52fd389e	✗	✗	✗	✓	✗
58e15b12	✗	✓	✗	✗	✗
79fb03f4	✓	✗	✗	✗	✗
8b28cd80	✓	✗	✗	✗	✗
8fbca751	✗	✗	✓	✗	✗
a04b2602	✗	✓	✗	✗	✗
a096bf4d	✗	✓	✗	✗	✗
a3f84088	✗	✓	✗	✗	✗
b457fec5	✗	✓	✗	✗	✗
b942fd60	✗	✓	✗	✗	✗
d931c21c	✓	✗	✗	✗	✗
f21745ec	✗	✗	✓	✗	✗
0934a4d8	✓	✓	✗	✗	✗
09c534e7	✓	✓	✗	✗	✗
12eac192	✓	✓	✗	✗	✗
17b80ad2	✗	✗	✓	✓	✗
184a9768	✓	✓	✗	✗	✗
212895b5	✓	✓	✗	✗	✗
21f83797	✓	✗	✓	✗	✗
25094a63	✓	✓	✗	✗	✗
37d3e8b2	✓	✓	✗	✗	✗
47996f11	✓	✓	✗	✗	✗
4e45f183	✓	✓	✗	✗	✗
4ff4c9da	✓	✓	✗	✗	✗
516b51b7	✓	✓	✗	✗	✗
696d4842	✓	✓	✗	✗	✗
6ad5bdfd	✓	✓	✗	✗	✗
7d1f7ee8	✗	✓	✗	✓	✗
7d419a02	✓	✓	✗	✗	✗
8719f442	✓	✓	✗	✗	✗
896d5239	✓	✓	✗	✗	✗
90347967	✓	✗	✓	✗	✗
93c31fbe	✓	✓	✗	✗	✗
96a8c0cd	✓	✓	✗	✗	✗
97239e3d	✓	✓	✗	✗	✗
9772c176	✓	✓	✗	✗	✗
9ddd00f0	✓	✓	✗	✗	✗
9def23fe	✓	✓	✗	✗	✗
a57f2f04	✗	✓	✓	✗	✗
ac0c5833	✓	✓	✗	✗	✗
aee291af	✓	✓	✗	✗	✗
b15fca0b	✓	✗	✓	✗	✗
b20f7c8b	✓	✗	✓	✗	✗
bd14c3bf	✓	✓	✗	✗	✗
bf32578f	✓	✓	✗	✗	✗
d017b73f	✓	✓	✗	✗	✗
dc2e9a9d	✓	✓	✗	✗	✗
e1d2900e	✓	✗	✓	✗	✗
e2092e0c	✓	✓	✗	✗	✗
e619ca6e	✓	✓	✗	✗	✗
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e88171ec	✓	✓	✗	✗	✗
ea9794b1	✓	✓	✗	✗	✗
f8be4b64	✓	✓	✗	✗	✗
f9d67f8b	✓	✓	✗	✗	✗
fea12743	✓	✓	✗	✗	✗
0a1d4ef5	✓	✗	✓	✓	✗
0c9aba6e	✓	✗	✓	✓	✗
11e1fe23	✓	✓	✓	✗	✗
136b0064	✓	✓	✓	✗	✗
14754a24	✓	✓	✓	✗	✗
15663ba9	✓	✓	✓	✗	✗
1990f7a8	✓	✓	✓	✗	✗
1c0d0a4b	✓	✓	✗	✓	✗
1c56ad9f	✓	✓	✓	✗	✗
1e81d6f9	✓	✓	✗	✓	✗
2697da3f	✓	✓	✓	✗	✗
310f3251	✓	✓	✗	✓	✗
3490cc26	✓	✓	✓	✗	✗
351d6448	✓	✓	✓	✗	✗
414297c0	✓	✓	✓	✗	✗
42918530	✓	✓	✓	✗	✗
42a15761	✓	✓	✓	✗	✗
477d2879	✓	✓	✓	✗	✗
4c177718	✓	✓	✓	✗	✗
5a5a2103	✓	✓	✓	✗	✗
639f5a19	✓	✓	✓	✗	✗
66f2d22f	✓	✓	✓	✗	✗
692cd3b6	✓	✓	✓	✗	✗
69889d6e	✓	✓	✓	✗	✗
712bf12e	✓	✓	✓	✗	✗
73ccf9c2	✓	✓	✓	✗	✗
759f3fd3	✓	✓	✓	✗	✗
79369cc6	✓	✓	✓	✗	✗
817e6c09	✓	✓	✓	✗	✗
845d6e51	✓	✓	✓	✗	✗
85b81ff1	✓	✓	✓	✗	✗
85fa5666	✗	✓	✓	✓	✗
8cb8642d	✓	✓	✓	✗	✗
929ab4e9	✓	✓	✓	✗	✗
94133066	✓	✓	✓	✗	✗
981571dc	✓	✓	✓	✗	✗
9b2a60aa	✓	✓	✓	✗	✗
9b365c51	✓	✗	✓	✓	✗
9caba7c3	✓	✓	✓	✗	✗
a8610ef7	✓	✓	✓	✗	✗
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af22c60d	✓	✓	✓	✗	✗
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c62e2108	✓	✓	✓	✗	✗
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c92b942c	✓	✓	✓	✗	✗
cad67732	✓	✓	✗	✓	✗
cb227835	✓	✓	✓	✗	✗
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d47aa2ff	✓	✓	✗	✗	✓
d5c634a2	✓	✓	✓	✗	✗
dc2aa30b	✓	✓	✓	✗	✗
de493100	✓	✓	✓	✗	✗
e41c6fd3	✓	✓	✓	✗	✗
e5790162	✓	✓	✓	✗	✗
e78887d1	✓	✓	✓	✗	✗
e9ac8c9e	✓	✓	✗	✓	✗
e9bb6954	✓	✓	✓	✗	✗
ecaa0ec1	✓	✓	✓	✗	✗
f0df5ff0	✓	✓	✓	✗	✗
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fd4b2b02	✓	✓	✓	✗	✗
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03560426	✓	✓	✓	✓	✗
070dd51e	✓	✓	✓	✓	✗
0a2355a6	✓	✓	✓	✓	✗
0becf7df	✓	✓	✗	✓	✓
0f63c0b9	✓	✓	✓	✓	✗
103eff5b	✓	✓	✓	✓	✗
13713586	✓	✓	✓	✗	✓
1da012fc	✓	✓	✓	✓	✗
20818e16	✓	✓	✓	✓	✗
22a4bbc2	✓	✓	✓	✓	✗
2c737e39	✓	✓	✓	✓	✗
319f2597	✓	✓	✓	✓	✗
3391f8c0	✓	✓	✓	✓	✗
33b52de3	✓	✓	✓	✓	✗
3a301edc	✓	✓	✓	✓	✗
456873bc	✓	✓	✓	✓	✗
4acc7107	✓	✓	✓	✓	✗
4e469f39	✓	✓	✓	✓	✗
5207a7b5	✓	✓	✓	✓	✗
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