DeepSeek V4.1 Flash hands-on tests and comparisons

Four CMP 170HX cards hit 287 tok/s on code with one user and 728 with eight, versus 91 tok/s on two ASUS GX10s, though the setup relies on an unlock tool and specific quants.

A user says a DeepSeek V4.1 Flash 1017 run on their work machine takes about 65 minutes, and notes vLLM is fast because it tunes for the GPU and precompiles CUDA graphs before serving.

Cursor's announcement puts DeepSeek V4.1 Flash at $0.60–$0.98 per task across all CursorBench effort levels with the best score in that price band; the poster suggests starting with light PR review and test generation.

Links to ISTA-DASLab's GSQ-RCO GGUF quantized weights of DeepSeek V4.1 Flash 1017 and the accompanying Abyss repository.

Upstream llama.cpp b11870 supports DeepSeek V4.1 Flash, but the author found the smallest working community GGUF (Q2_K) needs 246.3 GiB, far beyond 128 GB, and warns some fork GGUFs aren't interchangeable.

A developer used DeepSeek V4.1 Flash via GMI Cloud to build a playable Tesla Roadster 3D browser game, spending about $15 in API costs.

A user says DeepSeek V4.1 Flash is now in Cursor, with CursorBench showing $0.60–0.98 per task across reasoning levels, but third-party models bill at API rates, raising doubts about the new subscription's value.

For 1M input plus 1M output tokens, GPT-6.1 Terra charges $6 while DeepSeek V4.1 Flash costs $0.75–1.5, with input from $0.15 and output from $0.60.

Of OpenRouter's 188T tokens last week, DeepSeek 1017 took 33.6T with 801% weekly growth, and all top five models are Chinese; the author notes this is one platform's data only.

A developer says the model performed best for their use case against 10 other models after shipping it in a product, and notes its large context window for a Flash model.

The author ranks Opus 5.5 > GPT-6 Astra > V4.1 Flash > Grok 4.7 > GLM 5.3 Flash, calling V4.1 Flash Opus-like and ~300 tok/s but verbose with weak depth on complex problems.

Citing OpenRouter, Chinese models consumed 93.54T tokens in the week of Oct 19–25, with DeepSeek V4.1 Flash 1017 first at 33.6T, up 801% week over week.