Claude 3 Haiku vs Solar Pro 2
Wins 1 of 6 areas
Long documents
Wins 3 of 6 areas
Coding · Reasoning · Following instructions
Solar Pro 2 wins more areas, narrowly.Claude 3 Haiku is better at long documents.
Scores updated · 15 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 thinking02Solar Pro 22 of 3 tests · 1 tie
- CodingWriting and fixing software02Solar Pro 22 of 2 tests
- Following instructionsDoing exactly what it is asked01Solar Pro 21 of 1 test
- Long documentsFinding answers in very long texts10Claude 3 Haiku1 of 1 test
- AgentsCarrying out multi-step tasks on its own00Even0 each · 1 tie
- 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 Solar Pro 2 pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+31.3points ahead
- Code for real scientific research problemsSciCode+11.6points ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+3.3points ahead
Where Claude 3 Haiku pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+14.2points ahead
Every test, side by side
All 15 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingSolar Pro 2
- SciCodeSolar Pro 2 by 11.618.630.2+11.6
- Terminal-Bench HardSolar Pro 2 by 2.20.83+2.2
ReasoningSolar Pro 2
- GPQA DiamondSolar Pro 2 by 31.337.468.7+31.3
- Humanity's Last ExamSolar Pro 2 by 3.34.17.4+3.3
- CritPttie00tie
FactsEven
- AA-Omniscience · Non-hallucinationClaude 3 Haiku by 14.219.55.3+14.2
- AA-Omniscience · AccuracySolar Pro 2 by 2.417.619.9+2.4
Following instructionsSolar Pro 2
- IFBenchSolar Pro 2 by 136.137.1+1
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 3 Haiku by 7.3-48.6-55.9+7.3
- τ²-Bench Telecom (AA run)Solar Pro 2 by 721.128.1+7
- Artificial Analysis Coding IndexSolar Pro 2 by 5.46.712.1+5.4
- AA Agentic IndexSolar Pro 2 by 4.4711.4+4.4
- AA IntelligenceSolar Pro 2 by 1.95.67.5+1.9
Questions people ask
Which is better, Claude 3 Haiku or Solar Pro 2?
Solar Pro 2 wins three of the six areas where both have results: coding, reasoning and following instructions. Claude 3 Haiku wins long documents. They are level on agents and facts.
Which is better for coding?
Solar Pro 2. It wins 2 of the 2 coding tests both models report; Claude 3 Haiku wins none.
How do you compare the two?
We use the 15 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 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.