Kimi K3.1 called open-weight Opus 5.5 rival at $0.75 vs $3.01 per task
SumitGup · x · 2026-10-24
A user's hands-on comparison claims Kimi K3.1 is essentially an open-weight version of Opus 5.5 / GPT-6 Astra at a fraction of the cost. On the same whale-breaching scene task, Kimi cost $0.75 versus $3.01 for Opus 5.5, $2.00 for Astra, and $2.30 for Gemini 4 Argon, with comparable quality. (Unofficial single-user benchmark.)
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