Claude Sonnet 4.5 vs Nex-N2-Pro
Wins 0 of 6 areas
—
Wins 3 of 6 areas
Reasoning · Long documents · Following instructions
Nex-N2-Pro wins more areas, narrowly.
Scores updated · 16 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 thinking03Nex-N2-Pro3 of 3 tests
- Long documentsFinding answers in very long texts01Nex-N2-Pro1 of 1 test
- Following instructionsDoing exactly what it is asked01Nex-N2-Pro1 of 1 test
- CodingWriting and fixing software11Even1 each
- AgentsCarrying out multi-step tasks on its own11Even1 each
- FactsGetting facts right instead of making them up11Even1 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.
Nex-N2-Pro costs 93% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Nex-N2-Pro pulls ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+15.9points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+12points ahead
- Real work tasks from 44 professionsGDPVal+9.8points ahead
Where Claude Sonnet 4.5 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+45.8points ahead
- Customer-service tasks in a simulated bankτ-Bench V3 · Banking+7points ahead
- Code for real scientific research problemsSciCode+2.4points ahead
Every test, side by side
All 16 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingEven
- Terminal-Bench 2.1Nex-N2-Pro by 1255.867.8+12
- SciCodeClaude Sonnet 4.5 by 2.445.743.3+2.4
AgentsEven
- GDPValNex-N2-Pro by 9.820.530.3+9.8
- τ-Bench V3 · BankingClaude Sonnet 4.5 by 724.517.5+7
ReasoningNex-N2-Pro
- Humanity's Last ExamNex-N2-Pro by 15.917.833.7+15.9
- CritPtNex-N2-Pro by 7.51.18.6+7.5
- GPQA DiamondNex-N2-Pro by 5.883.489.2+5.8
FactsEven
- AA-Omniscience · Non-hallucinationClaude Sonnet 4.5 by 45.850.95.1+45.8
- AA-Omniscience · AccuracyNex-N2-Pro by 1.932.934.8+1.9
Following instructionsNex-N2-Pro
- IFBenchNex-N2-Pro by 8.957.366.2+8.9
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 Sonnet 4.5 by 26.9-0.1-27.1+26.9
- AA Agentic IndexNex-N2-Pro by 13.717.531.2+13.7
- AA IntelligenceNex-N2-Pro by 7.520.728.2+7.5
- Artificial Analysis Coding IndexNex-N2-Pro by 752.159.1+7
- τ²-Bench Telecom (AA run)Nex-N2-Pro by 3.578.181.6+3.5
Questions people ask
Which is better, Claude Sonnet 4.5 or Nex-N2-Pro?
Nex-N2-Pro wins three of the six areas where both have results: reasoning, long documents and following instructions. Claude Sonnet 4.5 wins none. They are level on coding, agents and facts.
Which is better for coding?
Neither. They win 1 coding test each of the 2 both models report.
Which is cheaper?
Claude Sonnet 4.5 costs $3.00 per million input tokens and $15.00 per million output tokens; Nex-N2-Pro costs $0.25 and $1.00. That makes Nex-N2-Pro about 93% cheaper for the same work.
How do you compare the two?
We use the 16 benchmark tests both models have published scores on. The verdict counts the 11 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.