Kimi K3.1 Pro hands-on: 2-3x faster, 5x cheaper than Astra, fixes overthinking
cedric_chee · x · 2026-10-24
A hands-on review of Kimi K3.1 Pro reports it runs 2-3x faster than K3, with the "overthinking" problem fixed, making it a well-rounded model. Benchmarked against Opus 5.5, Astra, GPT-6.1 Sol, Sonnet 5.5 and DeepSeek V4.1-Flash: a 5-minute task cost just $0.55, pricing is 5x cheaper than Astra, 3x cheaper than Opus 5.5, and on par with GPT-6.1 Sol. The reviewer says its design taste now feels Astra-class, with open models closing in on the frontier for 3D work.
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