Claude Haiku 4.5 vs Mi:dm K 2.5 Pro
Wins 5 of 6 areas
Coding · Agents · Facts · Long documents · Following instructions
Wins 0 of 6 areas
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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 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.
- FactsGetting facts right instead of making them up10Claude Haiku 4.51 of 2 tests · 1 tie
- CodingWriting and fixing software10Claude Haiku 4.51 of 1 test
- AgentsCarrying out multi-step tasks on its own10Claude Haiku 4.51 of 1 test
- 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
- ReasoningHard problems that need careful thinking11Even1 each · 1 tie
Coding, 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 Claude Haiku 4.5 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+66.6points ahead
- Reasons across sets of long documentsAA-LCR+65.3points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+25points ahead
Where Mi:dm K 2.5 Pro pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+2.9points ahead
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.
ReasoningEven
- GPQA DiamondMi:dm K 2.5 Pro by 2.967.270.1+2.9
- Humanity's Last ExamClaude Haiku 4.5 by 2.310.48.1+2.3
- CritPttie00tie
FactsClaude Haiku 4.5
- AA-Omniscience · Non-hallucinationClaude Haiku 4.5 by 66.672.76.1+66.6
- AA-Omniscience · Accuracytie1817.9tie
Following instructionsClaude Haiku 4.5
- IFBenchClaude Haiku 4.5 by 554.349.3+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 54.8-4.4-59.2+54.8
- τ²-Bench Telecom (AA run)Mi:dm K 2.5 Pro by 31.854.786.5+31.8
- AA Agentic IndexMi:dm K 2.5 Pro by 26.510.336.8+26.5
- AA IntelligenceClaude Haiku 4.5 by 5.916.911+5.9
Questions people ask
Which is better, Claude Haiku 4.5 or Mi:dm K 2.5 Pro?
Claude Haiku 4.5 wins five of the six areas where both have results: coding, agents, facts, long documents and following instructions. Mi:dm K 2.5 Pro wins none. They are level on reasoning.
Which is better for coding?
Claude Haiku 4.5. It wins the one coding test both models report.
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.