DeepSeek V4.1 Flash 1017 vs Kimi K3.1 Pro

aka DeepSeek 1017 vs Moonshot AI Kimi K3.1 Pro

15 posts222 likes21.2K views

  • Author picksDeepSeek V4.1 Flash 10173–2
  • CheaperDeepSeek V4.1 Flash 101710/10 postsmedian gap ~2.5×
  • FasterEven4–4 (1 tied)

As stated in each post, not a controlled benchmark.

Posts

15

Same prompt, separate runs

9

Not a controlled comparison: prompts, tools and time differ.

About this matchup

DeepSeek V4.1 Flash 1017 vs Kimi K3.1 Pro in real side-by-side tests: 15 posts from X where both got the same prompt; 13 posts report cost or time. Judge coding ability from the actual outputs.

DeepSeek V4.1 Flash 1017 vs Kimi K3.1 Pro: which is better for coding?

Which is better for coding, DeepSeek V4.1 Flash 1017 or Kimi K3.1 Pro?

Author picks: where the author preferred one of the two, they picked DeepSeek V4.1 Flash 1017 3 times and Kimi K3.1 Pro twice. That covers 5 of the 15 posts here; each post is a different task, so watch the outputs above for the work you care about.

Which is cheaper, DeepSeek V4.1 Flash 1017 or Kimi K3.1 Pro?

10 posts state a cost for both: DeepSeek V4.1 Flash 1017 was cheaper in all 10 (median gap ~2.5×). These are the costs the posts state for each run, not list prices.

Which is faster, DeepSeek V4.1 Flash 1017 or Kimi K3.1 Pro?

9 posts state a time for both: each was faster in 4 (1 tied). Times are as stated in each post; tools and settings differ between posts.

Summary

DeepSeek V4.1 Flash 1017 and Kimi K3.1 Pro appear together in 15 posts on X: satellite Mesh Blackout benchmark, four models in OpenCode (@AlicanKiraz0), Blender axe, five models side by side (@sshayahmet), fart-powered backflip, three models (@LatentOperatorX), code-only 3D campfire, three models (@EvoLinkAi), erupting 3D volcano, Kimi K3.1 Pro and 3 others (@criscxuan) and 10 more. 10 of them are part of larger lineups with other models. The 5 most-viewed examples: In @AlicanKiraz0's ant colony foraging benchmark, four models, DeepSeek V4.1 Flash 1017 was cheaper ($0.172 vs $3.001), as reported in the post. In @sakatayasha's Three.js Egyptian temple complex at dawn, DeepSeek V4.1 Flash 1017 was faster (32 min vs 41 min), as reported in the post. In @LatentOperatorX's fart-powered backflip, three models, DeepSeek V4.1 Flash 1017 was cheaper ($0.05 vs $0.24) and faster (8.7 min vs 12.7 min), as reported in the post. In @EnvolDev's floatplane over a fjord, three models, DeepSeek V4.1 Flash 1017 was cheaper ($0.49 vs $24.12) and Kimi K3.1 Pro was faster (1 h 12 min vs 1 h 22 min), as reported in the post. In @AlicanKiraz0's satellite Mesh Blackout benchmark, four models in OpenCode, DeepSeek V4.1 Flash 1017 was cheaper ($0.47 vs $0.85) and faster (18.7 min vs 20.9 min), as reported in the post. The table below lists all 12 posts with numbers for both.

What each post reports

DeepSeek V4.1 Flash 1017 vs Kimi K3.1 Pro: cost, time and tokens as stated in each post
PostModelTimeCostTokensAuthor’s verdictPost
Satellite Mesh Blackout benchmark, four models in OpenCode@AlicanKiraz0DeepSeek V4.1 Flash 101718.7 min$0.47——X post
Satellite Mesh Blackout benchmark, four models in OpenCode@AlicanKiraz0Kimi K3.1 Pro20.9 min$0.85——X post
Blender axe, five models side by side@sshayahmetKimi K3.1 Pro1 h 30 min$3.587,270,000—X post
Blender axe, five models side by side@sshayahmetDeepSeek V4.1 Flash 1017————X post
Fart-powered backflip, three models@LatentOperatorXDeepSeek V4.1 Flash 10178.7 min$0.05——X post
Fart-powered backflip, three models@LatentOperatorXKimi K3.1 Pro12.7 min$0.24—The poster says DeepSeek almost matched Claude Opus 5.5 for 24 times less, and that Kimi K3.1 Pro disappoints again.X post
Code-only 3D campfire, three models@EvoLinkAiDeepSeek V4.1 Flash 10173 h 13 min$0.33——X post
Code-only 3D campfire, three models@EvoLinkAiKimi K3.1 Pro50.6 min$0.82——X post
Erupting 3D volcano, Kimi K3.1 Pro and 3 others@criscxuanKimi K3.1 Pro—$1.50—Author’s pickX post
Erupting 3D volcano, Kimi K3.1 Pro and 3 others@criscxuanDeepSeek V4.1 Flash 1017—$1.20——X post
Moonwalking dancer under a spotlight@LatentOperatorXKimi K3.1 Pro9.7 min$0.25—Author’s pickX post
Moonwalking dancer under a spotlight@LatentOperatorXDeepSeek V4.1 Flash 10177.3 min$0.05——X post
Lighthouse in a storm, one HTML file, first try@VortlynKimi K3.1 Pro———The poster calls the Kimi K3.1 Pro result garbage next to DeepSeek V4.1 Flash.X post
Lighthouse in a storm, one HTML file, first try@VortlynDeepSeek V4.1 Flash 1017———Author’s pickX post
Voxel pineapple cutaway in a custom engine@NoldoDevKimi K3.1 Pro10 s———X post
Voxel pineapple cutaway in a custom engine@NoldoDevDeepSeek V4.1 Flash 101710 s———X post
Halloween grim reaper 3D model, three models@LatentOperatorXDeepSeek V4.1 Flash 101718.5 min$0.12——X post
Halloween grim reaper 3D model, three models@LatentOperatorXKimi K3.1 Pro7.7 min$0.20——X post
Floatplane over a fjord, three models@EnvolDevKimi K3.1 Pro1 h 12 min$24.12—The poster says Kimi K3.1 Pro on Max could not beat DeepSeek V4.1 Flash on xhigh, at 49 times the price.X post
Floatplane over a fjord, three models@EnvolDevDeepSeek V4.1 Flash 10171 h 22 min$0.49—Author’s pickX post
Interactive 3D V8 engine lab in Three.js@sai0xgenDeepSeek V4.1 Flash 101748 min$0.86——X post
Interactive 3D V8 engine lab in Three.js@sai0xgenKimi K3.1 Pro31 min$2.16—The poster says both work; Kimi K3.1 Pro has the more polished UI and a combustion panel, DeepSeek V4.1 Flash a more detailed dyno cell.X post
3D solar system, four models, one shot@nexightaiKimi K3.1 Pro———The poster says Kimi K3.1 Pro built the most polished UI of the four and also cost the most.X post
3D solar system, four models, one shot@nexightaiDeepSeek V4.1 Flash 1017————X post
15-second LLM showreel in code@EvoLinkAiDeepSeek V4.1 Flash 1017—$0.19—The poster calls DeepSeek V4.1 Flash 1017 the budget pick and says Kimi K3.1 Pro has bolder type, richer colors and more scene variety.X post
15-second LLM showreel in code@EvoLinkAiKimi K3.1 Pro—$0.40—The poster calls DeepSeek V4.1 Flash 1017 the budget pick and says Kimi K3.1 Pro has bolder type, richer colors and more scene variety.X post
Three.js Egyptian temple complex at dawn@sakatayashaKimi K3.1 Pro41 min———X post
Three.js Egyptian temple complex at dawn@sakatayashaDeepSeek V4.1 Flash 101732 min———X post
Ant colony foraging benchmark, four models@AlicanKiraz0DeepSeek V4.1 Flash 1017—$0.172—Author’s pickX post
Ant colony foraging benchmark, four models@AlicanKiraz0Kimi K3.1 Pro—$3.001——X post

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

Quick facts

ModelVendorReleasedInput $/1M tokensOutput $/1M tokensContext (tokens)Official links
DeepSeek V4.1 Flash 1017DeepSeek2026-10-17$0.30peak hours; off-peak is half price$1.20peak hours; off-peak is half price1,000,000Release notes · Pricing
Kimi K3.1 ProMoonshot AI2026-10-231,000,000Tech blog · Announcement

From the vendors’ official pages, checked 2026-10-24. Standard API list prices; each value links its source and a blank cell could not be verified. The archive’s own numbers above are what each post states.

Who won where

9

Models

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