DeepSeek V4.1 Flash hands-on tests and comparisons

The author adds camera controls to a 3D pond scene generated by DeepSeek V4.1 Flash 1017, praising the sky, constellations, fireflies, bats, underwater fish and ripples, and calls it the strongest 3D model right now.

A user reports DeepSeek V4.1 Flash 1017 runs above 200 tok/s while costing very little, with a bill screenshot.

After adding GPT-6.1 Terra's price index, LLMScore ranks DeepSeek V4.1 Flash 1017 first on price-performance, followed by MiniMax M3.1 Flash, Ling-3.1-flash, Claude Haiku 5.5 and GPT-6.1 Terra.

A user compares GPT-6.1 Terra with DeepSeek V4.1 Flash 1017: 1017 wins in some cases, but Terra is steadier, less AI-sounding and less prone to nonsense, and its API is cheaper at the same speed, suiting Codex users.

Huyawo Research runs DeepSeek V4.1 Flash 1017 via DeepSeek Harness and Ollama Cloud for open-source ecosystem architecture, development and cloud experiments, citing strong engineering results and clear per-million-token savings.

A video pits open-source DeepSeek V4.1 Flash against Claude Opus 5.5 on the same tasks, asking whether open models are catching up.

A third-party gateway says that from Oct 27, DeepSeek V4.1 Flash and GLM 5.3 Flash UltraFast requests over 256K total input tokens are billed at 2x for input, cache hits and output.

DeepSeek V4.1 Flash 1017 is now available in the Cursor API; the poster finds Cursor's merged quota insufficient and wonders why Composer 3 is still missing.

Two CPU-offloading projects support DeepSeek V4.1 Flash 1017; the author tested Qwen3.8 on one 3090 with 64GB DDR4 at 100 tok/s decode.

A price comparison puts Terra at $1 input and $5 output per million tokens versus DeepSeek Flash at $0.15–0.30 input and $0.60–1.20 output.

A solo dev runs DeepSeek-V4.1-Flash-1017 locally on two DGX Sparks, citing no rate-limit resets mid-refactor, overnight agent runs without token bills and code staying in-house, while conceding the hardest bugs still go to cloud.

A user swapped Hermes simple-task bots from GPT-6.1 Sol to DeepSeek V4.1 Flash via the free magpie WorkBuddy international plugin and found it faster and smarter.