DeepSeek V4.1 Flash hands-on tests and comparisons

A long research-and-render prompt ran nearly an hour to produce a 3:08 16:9 explainer video; voiceover and motion graphics were weak while overall visuals held up.

The author ran a personal image-plus-logic benchmark on 93 models and calls V4.1 Flash 1017 the worst ever, arguing distillation, quantization and task-specific RL hurt general ability.

A Japanese user says DeepSeek V4.1 Flash looks good and wants to try it locally on Windows with a 5090 and 128GB RAM.

The post claims DeepSeek V4.1 Flash 1017 ranks first on Code Arena's open web-development leaderboard at one-tenth the cost of Kimi K3.

An English post summarizes the Oct 17 V4.1-Flash-1017 release: stronger coding and agentic performance, faster completion, shorter outputs, and open weights on Hugging Face.

A viral ModelTrace result showing 84.66% GPT-6 Astra similarity is debunked because its candidate pool only holds GPT/Claude models and even random numbers score high, while the 1017 release lifts DeepSWE v1.1 from 74.2 to 77.0, above GPT-6 Astra and Opus 5.5, at unchanged price and MIT-licensed weights.

A Japanese user notes V4.1 Flash 1017 places 12th on the WebDev frontend code benchmark, beating Kimi which once topped it, at smaller size and lower cost within half a year.

A Korean post lines up official per-1M-token prices for GPT-6 Luna, Haiku 5.5, Ultramarine 1 Flash, DeepSeek V4.1 Flash and Gemini 3.8 Flash, with selection advice by use case.

An 8-model test of thinking in Chinese found 7 got more expensive: DeepSeek V4.1 Flash burned 56% more tokens and Claude Haiku 5.5 43% more, with no accuracy change.

At the same 1M context, V4.1 Flash costs $0.15 input / $0.60 output per million tokens, roughly 7–8x cheaper than Meta Muse Spark Open, per OpenRouter data.

A developer reports a same-task render test where V4.1 Flash 1017 Max matched GPT-6.1 Sol Ultra's quality at similar wall time, with total API cost of just 0.44 cents, crediting free web search and native multimodality.

A Japanese AI daily reports FlashLabs' OrcaRouter now serves a free DeepSeek V4.1 Flash API with 1M-token input, image reading and tool calls, subject to usage limits.