DeepSeek V4.1 Flash hands-on tests and comparisons

A post lists OpenCode Console's 14 free model endpoints, including DeepSeek V4.1 Flash Free, warning that free endpoints vary in privacy terms and throughput versus paid versions.

A SAGE-EXL3 1.62bpw quant plus vLLM recipe runs V4.1 Flash on a single DGX Spark at 35.5 tok/s decode and 1,189 tok/s prefill, with 99.61% HumanEval answer-token agreement.

A user shows a DeepSeek V4.1 Flash IQ1_S ultra-low-bit quant running complex addition with roughly 3-minute prefill and about 11 tok/s generation.

A local deployment log runs V4.1 Flash 1017 (flash17 2.8bpw) on two DGX Spark boxes with four 524k-context sessions, and after shrinking prefill chunks a 248k-token prompt completes with zero errors.

A user reads tibo's "We are cooked" as a reaction to DeepSeek V4.1 Flash 1017 pixel-level distilling Astra at 2% of its price, and expects GPT to add guardrails against distillation.

Same retro robot animation prompt run through V4.1 Flash 1017 and Opus 5.5; the author finds Opus clearly better with a big taste gap, but the 20x price difference makes DeepSeek the practical pick.

Replacing Sonnet with DeepSeek V4.1 Flash 1017 for grunt work cuts Claude quota use, though the official API costs about ¥100 a day; workbuddy offers 0.11x rates domestically and ~100M free tokens daily overseas.

OpenCode swapped its Go and Free tiers to the October 17 DeepSeek V4.1 Flash checkpoint with 1M context and open weights on Hugging Face, requiring no action from users.

Qoder lists DeepSeek V4.1-Flash-1017 at 0.0x credits for both free and paid users through Oct 24; the poster suggests testing it on real stuck coding tasks rather than demos.

A user reports DeepSeek V4.1 Flash 1017 reaching over 300 tok/s in DeepSeek Harness and asks others for their top speeds.

A daily roundup says OpenCode updated DeepSeek V4.1 Flash to build 1017 on its Go and Free plans with no user action needed, and notes Qoder's free window through Oct 24.

The author ran a V4.1 Flash agent evaluation — 83 Aider Polyglot tasks, two agent frameworks, two API channels — entirely on InstaBox's free 4-core 8GB tier.