Hands-on Tests Show DeepSeek V4.1 Flash Beats Haiku 5.5 on Agent Tasks

A developer tested DeepSeek V4.1 Flash against Claude Haiku 5.5 on two real agent tasks in their own app, and DeepSeek won both. They concluded Haiku 5.5 is not a viable replacement.

2026-10-08 ~ 2026-10-08 · 2 related posts

• Real-world agent eval: DeepSeek V4.1 Flash beats Haiku 5.5 on both tasks — dergachoff · 2026-10-08
• DeepSeek V4.1 Flash beats Haiku 5.5 in dev's small eval on research sub-agent and title tasks — dergachoff · 2026-10-08