Answer the same prompt as a rival model; real users vote blind on which answer they prefer.
1,423
36% expected win rate against the board leader (1,526)
#91 of 113
board 2026-11-09
Source: ArenaMistral AIFrance· released Oct 2026· open weights
Ranked #56, tested so far in 4 of the 5 categories the Index averages.
Mistral AI, France. One of 3 models from this lab on the Index.
Snapshot November 10, 2026
OpenCharts Index
45.0
Ranked #56 (52 to 62) of 80 · 55.0% behind the frontier on average · 18 comparable tests · 4 counting categories
Part of this Index is an estimate. On the 4 categories it is tested in, it averages 46.4. The rest is filled in from models tested in every category, because it has too few results to count there yet: Agentic. Such estimates have been within 2.9 points about nine times in ten.
Its band runs from 41.0 to 48.2: where the Index could land once it is tested in every category, or if any single test were dropped. That covers #52 to #62, and neighbours inside that range are ties.
Needs more results (2 of 5 so far)
Averaging 44.2 on the 2 it has; the score opens at 4 of 5.
Distance to today's frontier on the hardest tests. Not a measure of intelligence.
What it's known for
Strongest in coding (53.3) and math (49.5). It trails the frontier most in multimodal, 60.4% behind on average. Between 50% and 60% behind the best published results, on average. Part of its Index is an estimate. It has too few results in agentic for that category to count, so it is filled in from models tested in every category. On the categories that do count it averages 46.4. Across its band it could sit anywhere from #52 to #62.
Strongest category
Coding
Writing, fixing and shipping real code, judged by tests or users.
53.3
Mean of 4 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.
99.4%
99.4% of the best (100.0%) · #15 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.
30.8%
98.6% behind the best published result (90.0%), measured above chance · #28 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 71.2 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.
1,423
36% expected win rate against the board leader (1,526)
#91 of 113
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.
Mistral Large 4
#56·Index 45.0D
0 : 17
wins · 1 tie · 18 shared
GPT-6 Astra
#1·Index 93.7A
GPT-6 Astra comes out ahead on 17 of the 18 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.
90.2%
91.2% of the best (96.4%), above chance
55th percentile of 96 · n = 198
high
Source: Epoch AI — AI Benchmarking Hub11.1%
31.0% of the best (36.0%)
48th percentile of 102
medium
Source: Epoch AI — AI Benchmarking Hub33.0%
37.9% of the best (79.0%), above chance
37th percentile of 76 · n = 100
high
Source: Epoch AI — AI Benchmarking Hub20.0%
13.3% of the best (90.0%), above chance
35th percentile of 72 · n = 100
high
Source: Epoch AI — AI Benchmarking Hub22.4%
23.8% of the best (94.0%)
11th percentile of 75 · n = 1,000
high
Source: Epoch AI — AI Benchmarking Hub54.2%
81.0% of the best (66.9%)
62th percentile of 96 · n = 338
12.2%
22.6% of the best (54.0%)
25th percentile of 25 · n = 11
high · agent: opencode · reasoning effort: high
Source: Epoch AI — AI Benchmarking Hub39.4%
72.2% of the best (54.6%)
38th percentile of 41
high · harness: chisel · reasoning effort: high
Source: Epoch AI — AI Benchmarking Hub1,562
19% expected win rate against the board leader (1,818)
66th percentile of 110
board 2026-11-09
Source: Arena (LMArena) — Leaderboard Dataset99.4%
99.4% of the best (100.0%)
84th percentile of 98 · n = 45
high
Source: Epoch AI — AI Benchmarking Hub58.6%
61.6% of the best (95.1%)
44th percentile of 78 · n = 290
high
Source: Epoch AI — AI Benchmarking Hub26.8%
26.8% of the best (100.0%)
37th percentile of 68 · n = 48
high
Source: Epoch AI — AI Benchmarking Hub10.0%
10.0% of the best (100.0%)
16th percentile of 81
51.6%
61.3% of the best (84.2%)
49th percentile of 58
high
Source: Epoch AI — AI Benchmarking Hub18.1%
20.0% of the best (90.5%)
34th percentile of 30 · n = 21
high
Source: Epoch AI — AI Benchmarking Hub1,231
39% expected win rate against the board leader (1,309)
17th percentile of 71
board 2026-11-09
Source: Arena (LMArena) — Leaderboard Dataset30.8%
1.4% of the best (90.0%), above chance
25th percentile of 37 · n = 60
high
Source: Epoch AI — AI Benchmarking Hub1,423
36% expected win rate against the board leader (1,526)
20th percentile of 113
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.