Magistral Small 2509 — Benchmarks

Benchmark scores for Magistral Small 2509 aggregated from public leaderboards (5 boards), with how it ranks among open models and how it compares with its nearest neighbours. See hardware requirements for what you need to run it.

llmrun Composite Score →

85.6

90% range 81.0–90.3 · from 5 boards

CodingNot enough data yet
AgentsNot enough data yet
MathNot enough data yet
Science82.890% range 74–91
ReasoningNot enough data yet

Magistral Small 2509 reasoning benchmarks

Multi-step logic and problem-solving — can the model think through a hard problem rather than recall an answer.

GPQA Diamond
GPQA Diamond is a set of extremely hard, graduate-level science questions (physics, chemistry, biology) written by domain experts and filtered so that skilled non-experts with web access still fail. It measures genuine reasoning rather than memorization.
47.6%
47.6%
median 55.7%open leader 93.2%
Overall best: Gemini 4 Argon (high) 96.4%
40th percentile · #60 of 100 open · #244 of 309 all
#60 of 100
#244 of 309
Independent
Epoch AI · Sep 2025
CritPt
CritPt (Critical Points) tests graduate-level physics problem-solving on research-style questions spanning mechanics, electromagnetism, quantum mechanics, and more. It was created by physicists to probe whether a model can reason through multi-step physics rather than pattern-match textbook answers.
0.3%
0.3%
median 0.9%open leader 26.6%
Overall best: Gemini 4 Carbon (high) 36.0%
42nd percentile · #48 of 84 open · #187 of 244 all
#48 of 84
#187 of 244
Lab-reported
Epoch AI · Sep 2025
DTBench
DTBench is a set of handcrafted, expert-validated multiple-choice questions on decision theory — Newcomb-like problems and related puzzles — built by the Conceptual Reasoning Index project with Anthropic. It tests whether a model can follow an abstract argument rather than recall a fact.
61.3%
61.3%
median 68.7%open leader 93.9%
Overall best: Claude Opus 5.5 Max 98.9%
35th percentile · #46 of 70 open · #188 of 235 all
#46 of 70
#188 of 235
Lab-reported
Epoch AI · Sep 2025

Magistral Small 2509 coding benchmarks

Writing, editing, and fixing real code — measured by whether the resulting program actually runs and passes tests.

SciCode
SciCode asks a model to write real scientific-computing code — implementing multi-step numerical methods drawn from physics, chemistry, biology, and math research — and checks the output against reference solutions. It was built by a team of scientists and ML researchers to test coding ability on genuine research problems, not typical software tasks.
35.2%
35.2%
median 40.1%open leader 60.9%
Overall best: Claude Opus 5.5 Max 66.9%
24th percentile · #55 of 72 open · #195 of 217 all
#55 of 72
#195 of 217
Lab-reported
Epoch AI · Sep 2025

Magistral Small 2509 math benchmarks

Symbolic and quantitative problem-solving, from competition math to multi-step calculation.

AIME 2024/2025
AIME (American Invitational Mathematics Examination) is a prestigious high-school competition of hard, integer-answer problems. It's a widely-cited yardstick for multi-step mathematical reasoning, here on the 2024–2025 papers.
28.1%
28.1%
median 54.4%open leader 99.4%
Overall best: Claude Fable 5 (high) 100.0%
40th percentile · #53 of 88 open · #228 of 292 all
#53 of 88
#228 of 292
Independent
Epoch AI · Sep 2025

Score vs VRAM in the 24 GB tier

Magistral Small 2509
Other models
Best Score for its VRAM
x: VRAM (GB) · y: llmrun Score

#22 of 36 that fit 24 GB

Each dot is a model at the best quant that fits a 24 GB GPU. The line steps up to the best Score available at each amount of VRAM; a dot below it is beaten by a model that needs no more memory.

Full 24 GB ranking →

Magistral Small 2509 vs its neighbours

Same boards for the nearest open models per llmrun Score and the best model that fits 24 GB. The highest score in each row is marked.

Board	Magistral Small 2509this model	Qwen3.8 27Bbest in classQ4_K_M · 18 GB	Magistral Small 2506nearest by ScoreQ4_K_M · 18 GB	Mistral Small 3.2 24B Instruct 2506nearest by ScoreQ4_K_M · 18 GB	Phi 4nearest by ScoreQ4_K_M · 13 GB
llmrun Score	85.6	122.0	88.7	85.7	83.9
GPQA Diamond	47.6%	—	56.1%	49.0%	56.1%
CritPt	0.3%	5.4%	—	0.0%	0.0%
DTBench	61.3%	88.0%	—	59.9%	—
SciCode	35.2%	46.6%	—	26.4%	—
AIME 2024/2025	28.1%	—	30.0%	30.3%	13.8%
Compare head to head		Compare	Compare	Compare	Compare

Scores aggregated from public benchmark sources (Epoch AI: 5 boards) — each linked from the benchmark pages. llmrun does not run these benchmarks. Percentiles and ranks are among open models in the llmrun catalogue; the median and leader marks refer to the same field.