built by extend.ai

Sonnet 4.5 vs GPT-5.1 (Low)

Head-to-head OCR comparison · 105 battles · Updated March 28, 2026

GPT-5.1 (Low)
Sonnet 4.5
Matchup55.2%(58W-47L)44.8%(47W-58L)
Overall49.4%(1153W-942L)40.9%(680W-767L)
ELO16091521
Rank#9#12

In head-to-head OCR battles, GPT-5.1 (Low) outperforms Sonnet 4.5 with a 55.2% win rate across 105 matchups. GPT-5.1 (Low) currently ranks #9 on the OCR Arena leaderboard with an ELO rating of 1609, while Sonnet 4.5 holds position #12 with an ELO of 1521. 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