Claude Haiku 4.5 vs K-EXAONE
Wins 3 of 6 areas
Coding · Facts · Long documents
Wins 2 of 6 areas
Reasoning · Following instructions
Claude Haiku 4.5 wins more areas, narrowly.K-EXAONE is better at reasoning.
Scores updated · 17 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.
- CodingWriting and fixing software30Claude Haiku 4.53 of 3 tests
- FactsGetting facts right instead of making them up20Claude Haiku 4.52 of 2 tests
- Long documentsFinding answers in very long texts10Claude Haiku 4.51 of 1 test
- ReasoningHard problems that need careful thinking03K-EXAONE3 of 3 tests
- Following instructionsDoing exactly what it is asked01K-EXAONE1 of 1 test
- AgentsCarrying out multi-step tasks on its own11Even1 each
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 three tests each model wins by the widest margin. Scores are out of 100.
Where Claude Haiku 4.5 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+61.5points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+13.9points ahead
- Reasons across sets of long documentsAA-LCR+13points ahead
Where K-EXAONE pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+11.1points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+10.4points ahead
- Customer-service tasks in a simulated bankτ-Bench V3 · Banking+4.9points ahead
Every test, side by side
All 17 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Haiku 4.5
- Terminal-Bench 2.1Claude Haiku 4.5 by 13.944.230.3+13.9
- SciCodeClaude Haiku 4.5 by 6.642.235.6+6.6
- Terminal-Bench HardClaude Haiku 4.5 by 4.627.322.7+4.6
AgentsEven
- GDPValClaude Haiku 4.5 by 11.811.80+11.8
- τ-Bench V3 · BankingK-EXAONE by 4.99.314.2+4.9
ReasoningK-EXAONE
- GPQA DiamondK-EXAONE by 11.167.278.3+11.1
- Humanity's Last ExamK-EXAONE by 3.510.413.9+3.5
- CritPtK-EXAONE by 1.101.1+1.1
FactsClaude Haiku 4.5
- AA-Omniscience · Non-hallucinationClaude Haiku 4.5 by 61.572.711.2+61.5
- AA-Omniscience · AccuracyClaude Haiku 4.5 by 1.61816.4+1.6
Following instructionsK-EXAONE
- IFBenchK-EXAONE by 10.454.364.7+10.4
Other results5 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 53.6-4.4-58+53.6
- τ²-Bench Telecom (AA run)K-EXAONE by 19.654.774.3+19.6
- Artificial Analysis Coding IndexClaude Haiku 4.5 by 11.843.932.1+11.8
- AA IntelligenceClaude Haiku 4.5 by 2.516.914.4+2.5
- AA Agentic IndexClaude Haiku 4.5 by 2.310.38+2.3
Questions people ask
Which is better, Claude Haiku 4.5 or K-EXAONE?
Claude Haiku 4.5 wins three of the six areas where both have results: coding, facts and long documents. K-EXAONE wins reasoning and following instructions. They are level on agents.
Which is better for coding?
Claude Haiku 4.5. It wins 3 of the 3 coding tests both models report; K-EXAONE wins none.
How do you compare the two?
We use the 17 benchmark tests both models have published scores on. The verdict counts the 12 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 5 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.