Dev Test: Haiku 5.5 Beats DeepSeek and GLM Flash for In-App Chat

A developer reports that Claude Haiku 5.5 delivers fast, Opus-like in-app chat experiences that clearly outperform DeepSeek V4.1 Flash and GLM-5.3 Flash at lower cost.

2026-10-14 ~ 2026-10-14 · 2 related posts

• Dev uses Haiku 5.5 for in-app chat: users thought it was Opus — EXM7777 · 2026-10-14

1 near-duplicate retellings: EXM7777