Magistral Medium 1 vs o3
Wins 0 of 6 areas
—
Wins 5 of 6 areas
Coding · Agents · Reasoning · Long documents · Following instructions
o3 is the stronger all-rounder.
Scores updated · 21 tests both models report · How we compare
Where each one wins
Tests won in each of the six areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- ReasoningHard problems that need careful thinking03o33 of 4 tests · 1 tie
- CodingWriting and fixing software02o32 of 2 tests
- AgentsCarrying out multi-step tasks on its own01o31 of 1 test
- Long documentsFinding answers in very long texts01o31 of 1 test
- Following instructionsDoing exactly what it is asked01o31 of 1 test
- FactsGetting facts right instead of making them up11Even1 each
Agents, long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where o3 pulls ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+46.3points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+28points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+18.3points ahead
Where Magistral Medium 1 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+28.8points ahead
Every test, side by side
All 21 tests both models report. The winning score is in its model's colour; marks a score checked independently.
Reasoningo3
- GPQA Diamondo3 by 14.867.982.7+14.8
- Humanity's Last Examo3 by 10.39.820.1+10.3
- ARC-AGI-2o3 by 6.506.5+6.5
- CritPttie0.31.1tie
FactsEven
- AA-Omniscience · Non-hallucinationMagistral Medium 1 by 28.840.711.9+28.8
- AA-Omniscience · Accuracyo3 by 18.320.338.6+18.3
Other results10 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- τ²-Bench Telecom (AA run)o3 by 57.623.180.7+57.6
- ARC-AGI-1o3 by 54.76.160.8+54.7
- LiveCodeBencho3 by 34.450.384.7+34.4
- Aider-Polygloto3 by 34.247.181.3+34.2
- Artificial Analysis Coding Indexo3 by 22.41638.4+22.4
- AIME 2025o3 by 21.564.986.4+21.5
- AIME 2024o3 by 20.970.791.6+20.9
- AA Agentic Indexo3 by 20.415.736.1+20.4
- AA-Omniscienceo3 by 11.4-26.9-15.6+11.4
- AA Intelligenceo3 by 11.19.120.2+11.1
Questions people ask
Which is better, Magistral Medium 1 or o3?
o3 wins five of the six areas where both have results: coding, agents, reasoning, long documents and following instructions. Magistral Medium 1 wins none. They are level on facts.
Which is better for coding?
o3. It wins 2 of the 2 coding tests both models report; Magistral Medium 1 wins none.
How do you compare the two?
We use the 21 benchmark tests both models have published scores on. The verdict counts the 11 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 10 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.