DeepSeek V4.1 Flash hands-on tests and comparisons

A user says V4.1 Flash 10-17 performs around Opus 4.6–4.8 level but is very slow and makes worse guesses and theories than Claude.

A user got DeepSeek V4.1 Flash Maya XS running on an AMD Ryzen AI Max+ 395 DIVE CX box at about 15 tok/s, with setup and tuning done by GPT-6 Astra, and notes remaining issues.

Using OpenCode with DeepSeek V4.1 Flash, the author spent under $2 and about two hours on modeling, texturing and Blender rendering, then had it generate a Godot project from the same asset.

The author compared eight models on small customer-message handling: GLM 5.3 Flash usable but slow, Haiku not smart enough, Sonnet/Opus too expensive, GPT 6.1 Terra weak, Grok 4.7 good but slow; the two Chinese models won on very low price and fast replies, while Opus 5.5 remains the pick for code.

A user complains vLLM merges PRs for non-mainstream setups too slowly, citing V4.1 Flash being completely broken and unable to start on 4x RTX 6000 Pro with mainline vLLM.

The author wired DeepSeek V4.1 Flash into Wally as ghost-text autocomplete and says it is fast enough to write whole functions before the finger leaves Tab, with a demo video.

Local DeepSeek-V4.1-Flash at ISTA-DAS 2.25 bpw on one RTX 5090: 47 tok/s long generation and 1,400 tok/s prefill, beating Project Maya on the same box.

After the price hike, running DeepSeek V4.1 Flash at max effort inside an agent costs tens of yuan a day and 1,000–2,000 a month, the poster says.

The user says Astra got nerfed, so they went back to Opus 5.5, Fable 5.1 and the latest DeepSeek V4.1 Flash.

The author used Hermes agent with DeepSeek V4.1 Flash 1017 via Venice to replace their Amazon smart TV homepage with a custom dashboard and block adware, noting the local connection setup was most of the work.

A user pushes back on the idea that only small 4-bit quants run locally, saying the full native quant of DeepSeek V4.1 Flash 1017 runs at solid speeds across 4x DGX Sparks.

A commenter finds the comparison of DeepSeek V4.1 Flash 1017 to a nonexistent Opus 5.3 wild, while acknowledging the current hype around open-weight models.