Why hackers moved from Claude Sonnet to Claude Opus

1 hacker described this switch in public comments. Their words, with links to the originals.

Claude Sonnet 2 hackers criticize it
→
Claude Opus 5 hackers recommend it

What hackers said about the move

“Sonnets just kept spinning, wasting tokens. Can't remember the last time it happened with Opus in my codebases. Reverting back.”
ashvardanian, 2026-06-30original comment ↗

Use Claude Sonnet? Get alerted when hackers criticize it.

Tell us the tools in your stack. When hackers start criticizing one of them, or moving to an alternative, you will hear about it first.

Claude Sonnet vs Claude Opus

Claude SonnetClaude Opus
Hackers who recommend25
Hackers who criticize22
Moved away from it16
Moved to it21

Counts are distinct hackers in the sampled comments, not market share.

Criticism of Claude Sonnet

“Sonnet isn't even worth considering in my world.”
ilitirit, 2026-08-14original comment ↗

Praise for Claude Opus

“My development platform of choice is Opus 4.8 --effort max.”
PeterStuer, 2026-07-02original comment ↗
“I'd probably still just use opus on low.”
Jcampuzano2, 2026-06-30original comment ↗
“What has stopped me so far is the lack of real alternative to Opus. Not even gpt5.4 comes close”
frr149, 2026-04-10original comment ↗
“Opus 4.5 and 5.2 Codex are both so clearly more competent than previous models”
mkozlows, 2025-12-30original comment ↗