DeepSeek V4.1 Flash hands-on tests and comparisons

A user says Kimi K3.1 Pro, MiniMax M3.1 Flash, Muse wonder and Gemini 4 Argon all failed a test while DeepSeek V4.1 Flash 1017 held up, without giving test details.

A four-model volcano rendering comparison (Kimi K3.1 Pro, GPT-5 Astra Max, DeepSeek-V4.1-Flash Max, GLM-5.3-Flash Max) finds Kimi's 3D modeling notably more detailed, with per-model costs listed.

After hitting Claude Sonnet 5.5 limits, a user switched to Gemini 4 Argon and free V4.1 Flash in OpenCode, solving photo contour extraction at a 53:1 cost ratio.

A user says Kimi K3.1 Pro, MiniMax M3.1 Flash, Muse Wonder and Gemini 4 Argon all disappointed, leaving DeepSeek V4.1 Flash 1017 as the remaining hope for stability, speed and finishing work.

A user's chart shows V4.1 Flash-1017 modestly improving on ARC-AGI-2 and slightly beating Gemini 3.1 Pro Preview, with a side complaint about missing token-axis options.

In a simulated city nuclear-strike task, DeepSeek V4.1 Flash 1017 cost $0.67 and took 2h27m, far below Opus 5.5 at $148.65 and nearly 12 hours.

The same pelican-on-a-bicycle prompt is run through DeepSeek V4.1 Flash 1017, GPT-6.1 Sol, Gemini 4 Argon and Claude Opus 5.5, with the author saying the new model's details keep up.

One prompt for a 3D cheetah chasing a deer is run across Opus 5.5, Gemini 4 Argon, DeepSeek V4.1 Flash 1017, GPT-6 Astra, Sonnet 5.5 and 6.1 Sol, with the poster saying Opus 5.5 is outdone by Sonnet 5.5.

A video frontend comparison finds V4.1 Flash 1017 cheaper with better completeness, while Gemini 4 Argon has stronger design sense and transitions but misses one detail.

WebDev Arena's first rating of V4.1 Flash 1017 is 1670 (#12), overlapping Gemini 4 Argon's 1678 and beating GPT-5.6 Sol's 1616 and its own September version's 1619; Opus 5.5 still leads at 1806.

Same one-shot prompt for four models: Opus 5.5 took $73.80 and 2h56m, DeepSeek Flash 1017 only $0.34 and 46 minutes, 217x cheaper with nearly matching quality.

The author reads the vendor table: DeepSWE 77.0 is close to Gemini 4 Argon's 77.9 and GPT-6.1 Sol's 75.2, while HLE 42.6 ties GLM-5.3 and Qwen3.8 Max but trails four overseas models by 7 to 15 points.