Claude 3.7 Sonnet vs K2-V2 (high)
Wins 4 of 5 areas
Coding · Reasoning · Facts · Long documents
Wins 1 of 5 areas
Following instructions
Claude 3.7 Sonnet is the stronger all-rounder.K2-V2 (high) is better at following instructions.
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.
- CodingWriting and fixing software20Claude 3.7 Sonnet2 of 2 tests
- FactsGetting facts right instead of making them up20Claude 3.7 Sonnet2 of 2 tests
- ReasoningHard problems that need careful thinking10Claude 3.7 Sonnet1 of 3 tests · 2 ties
- Long documentsFinding answers in very long texts10Claude 3.7 Sonnet1 of 1 test
- Following instructionsDoing exactly what it is asked01K2-V2 (high)1 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 3.7 Sonnet pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+51points ahead
- Reasons across sets of long documentsAA-LCR+16.7points ahead
- Code for real scientific research problemsSciCode+11.7points ahead
Where K2-V2 (high) pulls ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+11.8points 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.
CodingClaude 3.7 Sonnet
- SciCodeClaude 3.7 Sonnet by 11.740.328.6+11.7
- Terminal-Bench HardClaude 3.7 Sonnet by 11.421.29.8+11.4
ReasoningClaude 3.7 Sonnet
- GPQA DiamondClaude 3.7 Sonnet by 9.177.268.1+9.1
- CritPttie0.90tie
- Humanity's Last Examtie9.710.5tie
FactsClaude 3.7 Sonnet
- AA-Omniscience · Non-hallucinationClaude 3.7 Sonnet by 51609+51
- AA-Omniscience · AccuracyClaude 3.7 Sonnet by 9.52818.5+9.5
Long documentsClaude 3.7 Sonnet
- AA-LCRClaude 3.7 Sonnet by 16.751.735+16.7
Following instructionsK2-V2 (high)
- IFBenchK2-V2 (high) by 11.848.360.1+11.8
Other results3 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 3.7 Sonnet by 54.9-0.7-55.6+54.9
- τ²-Bench Telecom (AA run)Claude 3.7 Sonnet by 26.954.727.8+26.9
- AA IntelligenceClaude 3.7 Sonnet by 7.817.79.9+7.8
Questions people ask
Which is better, Claude 3.7 Sonnet or K2-V2 (high)?
Claude 3.7 Sonnet wins four of the five areas where both have results: coding, reasoning, facts and long documents. K2-V2 (high) wins following instructions.
Which is better for coding?
Claude 3.7 Sonnet. It wins 2 of the 2 coding tests both models report; K2-V2 (high) wins none.
How do you compare the two?
We use the 12 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 3 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.