GPT-6 Luna

OpenAI·Sep 22, 2026·12 harness configurations

GPT-6 Luna's best Semi-Private scores are 86.7% on v1 and 59.3% on v2, both at max reasoning. On v3, it reaches 0.2% with the Standard harness at medium reasoning and 0.6% with the Provider Adapter harness at max reasoning.

ARC-AGI 3 leaderboard

GPT-6 LunaGPT-6 Luna - Provider Adapter

Verified scores

Variant	ARC-AGI-1	ARC-AGI-2	ARC-AGI-3(Standard harness)	ARC-AGI-3(Provider Adapter harness)
Max	86.7%	59.3%	0.10%	0.59%
XHigh	73.0%	41.9%	0.16%	0.51%
High	70.3%	31.4%	0.18%	0.38%
Medium	61.0%	18.1%	0.19%	0.32%
Low	37.7%	4.6%	0.03%	0.24%
None	8.8%	0.0%	0.03%	0.05%

Tasks & environments

Pass/fail per reasoning level across each benchmark.

ARC-AGI-3 Public Demo - Standard harness

25 environments


SP80	4.8%	4.8%	4.8%	1.0%	0.0%	0.0%
TN36	2.5%	0.0%	0.0%	0.0%	0.0%	0.0%
LP85	0.4%	2.8%	0.0%	0.0%	0.0%	0.0%
AR25	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
BP35	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
CD82	0.0%	0.0%	0.0%	0.0%	0.0%	2.8%
CN04	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
DC22	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
FT09	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
G50T	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
KA59	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
LF52	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
LS20	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
M0R0	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
R11L	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
RE86	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
S5I5	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
SB26	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
SC25	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
SK48	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
SU15	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
TR87	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
TU93	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
VC33	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
WA30	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%

ARC-AGI-3 Public Demo - Provider Adapter harness

25 environments


SP80	4.8%	4.8%	4.8%	4.8%	2.0%	0.0%
TN36	3.6%	0.0%	0.0%	0.3%	0.0%	0.0%
LP85	2.8%	0.2%	2.8%	0.8%	1.0%	0.0%
KA59	0.7%	0.0%	0.0%	0.0%	0.0%	0.0%
AR25	0.6%	0.3%	0.0%	1.4%	0.0%	0.0%
RE86	0.6%	0.0%	0.0%	0.0%	0.0%	0.0%
FT09	0.5%	0.7%	4.8%	0.0%	0.0%	0.0%
R11L	0.3%	0.4%	0.6%	0.0%	0.0%	0.0%
BP35	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
CD82	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
CN04	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
DC22	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
G50T	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
LF52	0.0%	0.7%	0.0%	0.0%	0.0%	0.0%
LS20	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
M0R0	0.0%	0.6%	0.0%	0.0%	0.0%	0.0%
S5I5	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
SB26	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
SC25	0.0%	0.0%	1.1%	0.0%	0.0%	0.0%
SK48	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
SU15	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
TR87	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
TU93	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
VC33	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
WA30	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%

ARC-AGI-2 Public Eval

120 tasks

Task	Max	XHigh	High	Medium	Low	None
0934a4d8	✓	✓	✓	✗	✗	✗
135a2760	✗	✗	✗	✗	✗	✗
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16de56c4	✗	✗	✓	✗	✗	✗
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cbebaa4b	✓	✓	✗	✗	✗	✗
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faa9f03d	✗	✗	✗	✗	✗	✗
fc7cae8d	✓	✗	✗	✗	✗	✗

ARC-AGI-1 Public Eval

400 tasks

Task	Max	XHigh	High	Medium	Low	None
00576224	✓	✓	✓	✓	✓	✓
009d5c81	✓	✓	✓	✓	✓	✗
00dbd492	✓	✗	✓	✗	✓	✗
03560426	✓	✓	✓	✓	✗	✗
05a7bcf2	✓	✗	✓	✓	✗	✗
0607ce86	✗	✗	✗	✗	✗	✗
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070dd51e	✓	✓	✓	✓	✗	✗
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09c534e7	✗	✗	✗	✗	✗	✗
0a1d4ef5	✓	✓	✓	✓	✓	✗
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0d87d2a6	✗	✗	✗	✗	✗	✗
0e671a1a	✓	✓	✓	✗	✗	✗
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103eff5b	✓	✓	✓	✓	✗	✗
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12eac192	✗	✓	✗	✓	✗	✗
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13713586	✓	✓	✓	✗	✓	✗
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1acc24af	✗	✗	✗	✗	✗	✓
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fafd9572	✓	✓	✓	✓	✓	✗
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fc754716	✓	✓	✓	✓	✓	✓
fd096ab6	✗	✗	✗	✗	✗	✗
fd4b2b02	✓	✓	✓	✓	✗	✗
fe9372f3	✓	✓	✓	✗	✗	✗
fea12743	✓	✓	✗	✗	✗	✗
ff72ca3e	✓	✓	✓	✓	✗	✗

GPT-6 Luna

ARC-AGI 3 leaderboard

Verified scores

Tasks & environments

ARC-AGI-3 Public Demo - Standard harnessStandard harness enables a model to carry forward notes it chooses to keep with it throughout the environment.

ARC-AGI-3 Public Demo - Provider Adapter harnessThe Provider Adapter harness preserves opaque reasoning state between requests and uses compaction for longer conversations, allowing the model to reuse prior work.

ARC-AGI-2 Public Eval

ARC-AGI-1 Public Eval

ARC Prize 2026

ARC Prize: Newsletter

ARC-AGI-3 Public Demo - Standard harness

ARC-AGI-3 Public Demo - Provider Adapter harness