Opus vs Sonnet for summarizing long documents, my honest experience after a few weeks
This story is from 2026-09-12. It is preserved in the archive; the latest stories are on the live feed.
I do a lot of "read this long thing and give me the structure" work, so I ran the same documents through both for a while to see where the difference actually shows. For a straightforward report where the sections are already clear, Sonnet was honestly fine and faster. I couldn't reliably tell the…
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- 2026-09-12 08:07 · r/ClaudeAI
Opus vs Sonnet for summarizing long documents, my honest experience after a few weeks