Kimi K3.1 Pro tested: 2-3x faster than K3, $0.55 per run, closing on frontier 3D work
cedric_chee · x · 2026-10-24
A hands-on test of Kimi K3.1 Pro for 3D design and spatial reasoning, benchmarked against Opus 5.5, Astra, GPT-6.1 Sol, Sonnet 5.5 and DeepSeek V4.1-Flash:
- Speed/cost: 2-3x faster than K3, 5 min per run at $0.55
- Pricing: 5x cheaper than Astra, 3x cheaper than Opus 5.5, on par with GPT-6.1 Sol
- Quality: overthinking fixed; Max reasoning effort catches details that High misses (e.g., a shelter in a pagoda garden scene)
- Taste: design aesthetics now closer to Astra-class models; the author still prefers DeepSeek 1107's vibe
Takeaway: open models are closing in on the frontier for 3D work.
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