Claude Haiku 4.5 vs Magistral Small 1
Wins 5 of 5 areas
Coding · Reasoning · Facts · Long documents · Following instructions
Wins 0 of 5 areas
—
Claude Haiku 4.5 is the stronger all-rounder.
Scores updated · 13 tests both models report · How we compare
Where each one wins
Tests won in each of the five 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 thinking20Claude Haiku 4.52 of 3 tests · 1 tie
- CodingWriting and fixing software20Claude Haiku 4.52 of 2 tests
- FactsGetting facts right instead of making them up10Claude Haiku 4.51 of 2 tests · 1 tie
- Long documentsFinding answers in very long texts10Claude Haiku 4.51 of 1 test
- Following instructionsDoing exactly what it is asked10Claude Haiku 4.51 of 1 test
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 Claude Haiku 4.5 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+48.8points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+29.5points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+22.8points ahead
Where Magistral Small 1 pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 13 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Haiku 4.5
- Terminal-Bench HardClaude Haiku 4.5 by 22.827.34.5+22.8
- SciCodeClaude Haiku 4.5 by 18.142.224.1+18.1
ReasoningClaude Haiku 4.5
- GPQA DiamondClaude Haiku 4.5 by 3.167.264.1+3.1
- Humanity's Last ExamClaude Haiku 4.5 by 2.810.47.6+2.8
- CritPttie00tie
FactsClaude Haiku 4.5
- AA-Omniscience · Non-hallucinationClaude Haiku 4.5 by 48.872.723.9+48.8
- AA-Omniscience · Accuracytie1818tie
Following instructionsClaude Haiku 4.5
- IFBenchClaude Haiku 4.5 by 29.554.324.8+29.5
Other results4 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.
- AA-OmniscienceClaude Haiku 4.5 by 40-4.4-44.4+40
- Artificial Analysis Coding IndexClaude Haiku 4.5 by 32.843.911.1+32.8
- τ²-Bench Telecom (AA run)Claude Haiku 4.5 by 28.154.726.6+28.1
- AA IntelligenceClaude Haiku 4.5 by 8.716.98.2+8.7
Questions people ask
Which is better, Claude Haiku 4.5 or Magistral Small 1?
Claude Haiku 4.5 wins all five areas where both have results: coding, reasoning, facts, long documents and following instructions. Magistral Small 1 wins none.
Which is better for coding?
Claude Haiku 4.5. It wins 2 of the 2 coding tests both models report; Magistral Small 1 wins none.
How do you compare the two?
We use the 13 benchmark tests both models have published scores on. The verdict counts the 9 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 4 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.