DeepSeek V4.1 Flash vs GPT-6 Luna

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DeepSeek V4.1 Flash vs GPT-6 Luna in real side-by-side tests: 1 post from X where both got the same prompt; 1 post reports cost or time. Judge coding ability from the actual outputs.

Posts

1

Same prompt, separate runs

1

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

Summary

DeepSeek V4.1 Flash and GPT-6 Luna appear together in 1 post on X: lava lamp: small models (@bridgebench). It is part of larger lineups with other models. In @bridgebench's lava lamp: small models, GPT-6 Luna was faster (42.8 s vs 4 min), as reported in the post. According to @bridgebench, GPT-6 Luna built the best lamp of the three: cheapest, fastest and best. (The author’s view.)

What each post reports

DeepSeek V4.1 Flash vs GPT-6 Luna: cost, time and tokens as stated in each post
PostModelTimeCostTokensAuthor’s verdictOriginal
Lava lamp: small models@bridgebenchDeepSeek V4.1 Flash4 min$0.04——X post
Lava lamp: small models@bridgebenchGPT-6 Luna42.8 s——Author’s pickX post

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

Who won where

1

Prompts shown in the posts

build a lava lamp — @bridgebench

Models

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