DeepSeek V4.1 Flash hands-on tests and comparisons

A 2.9bpw EXL3 quant of V4.1 Flash 1017 on two DGX Sparks hits 73.5 tok/s single-stream and recalls all three needles in a 1,039,888-token prompt in 11 minutes.

The author had V4.1 Flash 1017 produce an explainer animation for open-source DeepInfer, calling it a dynamic slide deck with third-party TTS, and says it helped them grasp DeepInfer.

Third-party router OffRouter adds V4.1 Flash with reasoning, tool calling and image input, running in a sealed GPU enclave with signed receipts and stablecoin payment, no account needed.

A post uses a food-delivery analogy to explain the Pareto frontier — smarter at the same price or cheaper at the same intelligence — and says DeepSeek V4.1 Flash-1017 genuinely advanced it.

A user compares DeepSeek V4.1 Flash 1017 across OpenCode's default route (50–130 tok/s), the direct API (200–250 tok/s) and DeepSeek Harness (200–300 tok/s), with ~99.7–99.8% cache hit rates on Pi + DeepSeek.

A Saudi user details a ~400 SAR/month stack: ChatGPT for images, Claude Opus 5.5 as daily driver, and free DeepSeek V4.1 in OpenCode when quota runs out.

A developer shares a work-in-progress FLARE fine-tune of V4.1 Flash, noting the codegen benchmark is still overfit to c1 and the recipe is coming, while pointing to local-inference-lab's base version.

A user reads DeepInfer's Q&A: 155 trillion tokens a day, about $38 per GPU-hour at half price, while noting it runs only V4.1 Flash, omits cache and load balancing, and uses DeepSeek's own benchmarks.

Same prompt for a single-HTML desert oasis: DeepSeek V4.1 Flash took 21.9s on the second try for $0.0099, while free MiniMax M3.1 Flash took 576.8s in one shot with zero console errors.

A post breaks down DeepSeek's open-source DeepInfer: unified support for Nvidia SM100 and Huawei Ascend 950, with V4.1 Flash serving 155 trillion tokens per day per cluster at $38 per GPU-hour off-peak.

DeepSeek released DeepInfer, an open-source high-performance inference framework focused on offline inference, currently supporting DeepSeek-V4.1-Flash on NVIDIA SM100 GPUs and Huawei Ascend 950 NPUs.

B.AI offers 40% off DeepSeek-V4.1-Flash-1017 from Oct 22, noting the release improves agent and coding scores on 11 benchmarks at unchanged base pricing.