built by extend.ai

Sonnet 4.5 vs Nanonets2-3B

Head-to-head OCR comparison · 90 battles · Updated October 23, 2026

Sonnet 4.5
Nanonets2-3B
Matchup68.9%(62W-28L)31.1%(28W-62L)
Overall41.0%(768W-870L)29.3%(465W-921L)
ELO16331470
Rank#9#13

In head-to-head OCR battles, Sonnet 4.5 outperforms Nanonets2-3B with a 68.9% win rate across 90 matchups. Sonnet 4.5 currently ranks #9 on the OCR Arena leaderboard with an ELO rating of 1633, while Nanonets2-3B holds position #13 with an ELO of 1470. These rankings are based on blind community voting where users compare OCR outputs without knowing which model produced each result.

Try it yourself

Test these models on your own documents in the playground.

Open Playground →

Other comparisons