Agnes 2.5 Pro Alpha vs K2-Horizon-0.9B
Wins 4 of 5 areas
Coding · Agents · Reasoning · Long documents
Wins 0 of 5 areas
—
Agnes 2.5 Pro Alpha is the stronger all-rounder.
Scores updated · 12 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.
- AgentsCarrying out multi-step tasks on its own30Agnes 2.5 Pro Alpha3 of 3 tests
- ReasoningHard problems that need careful thinking30Agnes 2.5 Pro Alpha3 of 3 tests
- CodingWriting and fixing software10Agnes 2.5 Pro Alpha1 of 1 test
- Long documentsFinding answers in very long texts10Agnes 2.5 Pro Alpha1 of 1 test
- FactsGetting facts right instead of making them up11Even1 each
Coding and long documents rest on a single test each.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Agnes 2.5 Pro Alpha pulls ahead
- Reasons across sets of long documentsAA-LCR+69.4points ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+58.3points ahead
- Code for real scientific research problemsSciCode+36points ahead
Where K2-Horizon-0.9B pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+2.4points ahead
Every test, side by side
All 12 tests both models report. The winning score is in its model's colour; marks a score checked independently.
AgentsAgnes 2.5 Pro Alpha
- GDPValAgnes 2.5 Pro Alpha by 29.429.40+29.4
- τ-Bench V3 · BankingAgnes 2.5 Pro Alpha by 7.512.44.9+7.5
- Terminal-Bench 4.0Agnes 2.5 Pro Alpha by 330+3
ReasoningAgnes 2.5 Pro Alpha
- GPQA DiamondAgnes 2.5 Pro Alpha by 58.387.629.3+58.3
- Humanity's Last ExamAgnes 2.5 Pro Alpha by 28.233.65.4+28.2
- CritPtAgnes 2.5 Pro Alpha by 10.910.90+10.9
FactsEven
- AA-Omniscience · AccuracyAgnes 2.5 Pro Alpha by 26.633.56.9+26.6
- AA-Omniscience · Non-hallucinationK2-Horizon-0.9B by 2.411.914.3+2.4
Long documentsAgnes 2.5 Pro Alpha
- AA-LCRAgnes 2.5 Pro Alpha by 69.475.76.3+69.4
Other results2 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-OmniscienceAgnes 2.5 Pro Alpha by 47.7-25.1-72.8+47.7
- AA IntelligenceAgnes 2.5 Pro Alpha by 23.826.83+23.8
Questions people ask
Which is better, Agnes 2.5 Pro Alpha or K2-Horizon-0.9B?
Agnes 2.5 Pro Alpha wins four of the five areas where both have results: coding, agents, reasoning and long documents. K2-Horizon-0.9B wins none. They are level on facts.
Which is better for coding?
Agnes 2.5 Pro Alpha. It wins the one coding test both models report.
How do you compare the two?
We use the 12 benchmark tests both models have published scores on. The verdict counts the 10 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 2 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.