Claude Opus 5.5 vs Kimi K3.1 Pro

Only numbers stated in each post. “—” means the post doesn’t say.

• Japanese pixel-art street corner, Kimi vs OpusThe poster says Kimi K3.1 Pro is a cheaper alternative, though not yet at Opus 5.5 quality.— the author’s view, @gmi_cloud (paraphrased)
• Pixel volcano recreated, Opus vs Kimi K3.1 ProThe poster says the two results are not on the same level and that Opus 5.5 is still unmatched in this area.— the author’s view, @MingTian685474 (paraphrased)
• Fart-powered backflip, three modelsThe poster says DeepSeek almost matched Claude Opus 5.5 for 24 times less, and that Kimi K3.1 Pro disappoints again.— the author’s view, @LatentOperatorX (paraphrased)
• Toy poodle model, code onlyThe poster expected more but finds both cute, and says Kimi K3.1 Pro tends to overthink and burn reasoning tokens first.— the author’s view, @harupm55 (paraphrased)
• Blind Mario level test, Kimi K3.1 Pro vs OpusIn a follow-up reply that reveals the names, the poster says Opus 5.5 wins and it wasn't close.— the author’s view, @luckeyfaraday (paraphrased)
• Jelly prism that splits real lightThe poster picks Kimi K3.1 Pro: one clean rainbow like the album cover, while Claude Opus 5.5 went full laser show with beams everywhere.— the author’s view, @0xRhinoX (paraphrased)
• Mechanical watch assembly in 3DThe poster says Kimi K3.1 Pro had all the time in the world and still lost to Claude Opus 5.5.— the author’s view, @kairox36 (paraphrased)
• Haunted carousel you can rideThe poster picks Kimi K3.1 Pro and asks whether Claude Opus 5.5 was nerfed.— the author’s view, @dromexa (paraphrased)
• Underwater research station and bathyscapheThe poster prefers Claude Opus 5.5's scene and asks whether he is doing something wrong with Kimi K3.1 Pro.— the author’s view, @kenonews (paraphrased)
• 3D lighthouse scene in the browserThe poster says Kimi K3.1 Pro went for rock detail, foam and clouds, and Claude Opus 5.5 for light, gulls and lightning, and asks which to ship.— the author’s view, @X1Kafadzhy (paraphrased)
• Black hole and pirate ship, Kimi vs OpusThe poster finds them hard to tell apart and thinks Kimi K3.1 Pro can challenge Claude.— the author’s view, @manmanloveai (paraphrased)
• Foldable iPhone browser buildThe poster says it is not even close: Claude Opus 5.5 closes into a phone with a lock screen, while Kimi K3.1 Pro closes into a grey slab.— the author’s view, @cop_on_fire (paraphrased)
• Alpine Gold scene, max vs xhighThe poster says Kimi K3.1 Pro did better than on their Lighthouse test but is still far from Claude Opus 5.5.— the author’s view, @EnvolDev (paraphrased)
• Rainbow jelly you can cut, nail and torchThe poster praises Kimi K3.1 Pro’s colors and colored shadows and says Claude Opus 5.5 took 3x longer and cost 5x more.— the author’s view, @0xRhinoX (paraphrased)
• 3D bathyscaphe with skills disabledThe poster calls it a clear quality gap in favor of Claude Opus 5.5, which also cost half as much.— the author’s view, @kenonews (paraphrased)
• 3D racing game, same 64K tokensThe poster says Kimi K3.1 Pro shipped a working neon racer, while Claude Opus 5.5 never wrote a line.— the author’s view, @gojoruns (paraphrased)
• Personal site cover, same harnessThe poster picks Claude Opus 5.5; Kimi K3.1 Pro is good but plays it safe, and GPT-6 Astra is good but too abstract.— the author’s view, @jackyang (paraphrased)
• Roadster animation, same stepsThe poster says the $2 one looks better.— the author’s view, @the0xbt (paraphrased)
• Haunted ship, one try eachKimi K3.1 Pro went for glowing waves, Claude Opus 5.5 for dark atmosphere and GPT-6.1 Sol for a cleaner ship; the poster picks Claude Opus 5.5 for atmosphere.— the author’s view, @olezhavich (paraphrased)
• Microducks scene, high effortThe poster says Claude Opus 5.5 still catches more details, but Kimi K3.1 Pro gets surprisingly close at about 3.5x less.— the author’s view, @BuildFastWithAI (paraphrased)
• Interactive 3D stained-glass butterflyThe poster says Kimi nailed the glass, lighting and gold details, while the Opus 5.5 result looked like a cheaper model.— the author’s view, @ivanainai (paraphrased)
• Animated promo SVG for a websiteThe poster picks Kimi K3.1 Pro for a cleaner design, better branding and smoother animation.— the author’s view, @immadiuttej (paraphrased)
• Single-file Three.js test, three frontier modelsThe poster says Kimi K3.1 Pro beat GPT-6 Astra and is now competing at the frontier.— the author’s view, @AI_Screening (paraphrased)

A holographic CD spinning on its edge until it falls — @Terry_Djony