Answer the same prompt as a rival model; real users vote blind on which answer they prefer.
1,442
38% expected win rate against the board leader (1,526)
#70 of 113
xhigh · board 2026-11-09
Source: ArenaxAIUnited States· released Sep 2026
Ranked #36, 40.9% behind the frontier on average.
xAI, United States. One of 9 models from this lab on the Index.
Snapshot November 10, 2026
OpenCharts Index
59.1
Ranked #36 (27 to 39) of 80 · 40.9% behind the frontier on average · 24 comparable tests · 5 counting categories
Drop any single test and the Index lands between 55.6 and 62.5, anywhere from #27 to #39. Neighbours inside that range are ties.
4 of 5 hardest tests · share of the frontier
Distance to today's frontier on the hardest tests. Not a measure of intelligence.
What it's known for
Strongest in coding (68.2) and agentic (64.7). It trails the frontier most in math, 50.8% behind on average. Between 40% and 50% behind the best published results, on average. Drop any single test and it would sit anywhere from #27 to #39.
Strongest category
Coding
Writing, fixing and shipping real code, judged by tests or users.
68.2
Mean of 5 of the category's 6 comparable tests. Counts toward the Index.
Best single result
Solve competition mathematics problems that have a single exact integer answer.
98.1%
98.1% of the best (100.0%) · #28 of 98.
Olympiad-style problems need long, careful chains of reasoning, and there is no partial credit.
Where it trails
Look at a photo of furniture partway through assembly, compare it with the manual, and say whether it has been built correctly so far.
20.8%
100.0% behind the best published result (90.0%), measured above chance · #29 of 37.
Matching a diagram to a real object is the skill behind repairing an appliance or checking an installation from a photo.
Not measured yet
Covered, but not averaged into the Index:
See it at work
Every test it has taken, by category, with the kind of task it faced, who produced the number and where the result landed against the best published one. The examples are original and illustrative, never items from the datasets themselves.
Human preference · mean 76.3 across 1 comparable test · a single-test category, shown beside the Index and never averaged into it
Answer the same prompt as a rival model; real users vote blind on which answer they prefer.
1,442
38% expected win rate against the board leader (1,526)
#70 of 113
xhigh · board 2026-11-09
Source: ArenaEvery result is read against the best published one on its test: percent scores as a share of the best above chance, Arena ratings as the expected win rate against the board leader, open-ended values on a log scale. Sitting a harder exam never lowers a model. Every number links to the publisher that produced it.
Head to head
Choose a rival. Every counted test both have taken appears side by side as a share of the best published result on that test, with the category means above. A win is a higher share; a gap under 2 points is a tie, because one item on a 45-problem exam is 2.2 points and publishers' own standard errors are of that order.
Grok 4.7
#36·Index 59.1C-
0 : 21
wins · 2 ties · 23 shared
GPT-6 Astra
#1·Index 93.7A
GPT-6 Astra comes out ahead on 21 of the 23 tests both have taken.
Category means
Reasoning
Knowledge
Coding
Math
Agentic
Multimodal
Human preference
Shared tests · biggest gaps first
Bars are distances to the best published result on each test (percent scores above chance, Arena ratings as win rate against the leader, open-ended values on a log scale). Raw values as the publishers report them.
Open GPT-6 AstraScores
The best published run per benchmark, the raw value as the publisher reports it, who produced the number, how close it comes to the best published result on that test, and where the model sits among every model scored on it. Percent scores are read above chance, Arena ratings as a win rate against the board leader, open-ended values on a log scale. A test with too few models to compare against is shown but not counted, and so is an archived test: one whose publisher no longer covers new models.
Category means
Mean · tests taken of the category's comparable tests. A faded category either rests on fewer than half of them or is a single-test category (marked “beside”), which is shown next to the Index and never averaged into it.
92.7%
94.9% of the best (96.4%), above chance
76th percentile of 96 · n = 198
xhigh
Source: Epoch AI — AI Benchmarking Hub61.4%
64.6% of the best (95.0%)
55th percentile of 67 · n = 120
xhigh
Source: Epoch AI — AI Benchmarking Hub90.2%
91.5% of the best (98.5%)
53th percentile of 67 · n = 100
high
Source: Epoch AI — AI Benchmarking Hub18.0%
50.0% of the best (36.0%)
65th percentile of 102
high
Source: Epoch AI — AI Benchmarking Hub41.0%
48.7% of the best (79.0%), above chance
52th percentile of 76 · n = 100
xhigh
Source: Epoch AI — AI Benchmarking Hub29.0%
24.5% of the best (90.0%), above chance
55th percentile of 72 · n = 100
xhigh
Source: Epoch AI — AI Benchmarking Hub56.0%
59.6% of the best (94.0%)
70th percentile of 75 · n = 1,000
xhigh
Source: Epoch AI — AI Benchmarking Hub57.8%
86.3% of the best (66.9%)
81th percentile of 96 · n = 338
high
Source: Epoch AI — AI Benchmarking Hub18.7%
34.6% of the best (54.0%)
38th percentile of 25 · n = 11
xhigh · agent: codex_cli · reasoning effort: xhigh
Source: Epoch AI — AI Benchmarking Hub47.6%
87.1% of the best (54.6%)
78th percentile of 41
harness: grok-build · reasoning effort: high
Source: Epoch AI — AI Benchmarking Hub46.3%
80.1% of the best (57.8%)
53th percentile of 18
xhigh · reasoning level: Extra High
Source: Epoch AI — AI Benchmarking Hub1,639
26% expected win rate against the board leader (1,818)
84th percentile of 110
xhigh · board 2026-11-09
Source: Arena (LMArena) — Leaderboard Dataset98.1%
98.1% of the best (100.0%)
71th percentile of 98 · n = 45
xhigh
Source: Epoch AI — AI Benchmarking Hub53.0%
55.7% of the best (95.1%)
34th percentile of 78 · n = 290
xhigh
Source: Epoch AI — AI Benchmarking Hub17.1%
17.1% of the best (100.0%)
19th percentile of 68 · n = 48
xhigh
Source: Epoch AI — AI Benchmarking Hub26.0%
26.0% of the best (100.0%)
41th percentile of 81
54.6%
64.8% of the best (84.2%)
60th percentile of 58
$10,537
87.2% of the best ($16,484) on a log scale
88th percentile of 65
29.5%
42.2% of the best (69.9%)
43th percentile of 22 · n = 34
xhigh · harness: proximus
Source: Proximal (FrontierSWE leaderboard)1,249
41% expected win rate against the board leader (1,309)
37th percentile of 71
xhigh · board 2026-11-09
Source: Arena (LMArena) — Leaderboard Dataset20.8%
0.0% of the best (90.0%), above chance
0th percentile of 37 · n = 60
xhigh
Source: Epoch AI — AI Benchmarking Hub32.5%
55.6% of the best (58.6%)
54th percentile of 36 · n = 50
22.8%
65.1% of the best (35.0%)
47th percentile of 37 · n = 100
xhigh
Source: Epoch AI — AI Benchmarking Hub1,442
38% expected win rate against the board leader (1,526)
38th percentile of 113
xhigh · board 2026-11-09
Source: Arena (LMArena) — Leaderboard DatasetNearby on the leaderboard

29 of the models on this page run inside Theo today. Theo picks the right one for each step and always shows which engine answered.