---
type: "Article"
title: "Swift-1.5-Qwen3.8-Flash-Next NVFP4 with SparkRing on 2× DGX Spark"
description: "Swift-1.5-Qwen3.8-Flash-Next NVFP4 with SparkRing on 2× DGX Spark: recipe by fujitsupolycom with speed, condition and source for every number, weights and license."
resource: "https://www.contextstudios.ai/local-ai/fujitsupolycom--swift-1.5-qwen38-flash-next-nvfp4-tp2-2x-dgx-spark"
language: "en"
generated:
  by: "process:contextstudios-md/1"
  at: "2026-10-24T19:17:07.911Z"
status: "stable"
---

# Swift-1.5-Qwen3.8-Flash-Next NVFP4 with SparkRing on 2× DGX Spark

Swift-1.5-Qwen3.8-Flash-Next NVFP4 with SparkRing on 2× DGX Spark: 43.5 tok/s according to github.com (dataset as of Sep 29, 2026).

- Creator: [fujitsupolycom](https://www.contextstudios.ai/local-ai/creators/fujitsupolycom.md)
- Engine: vLLM (local-inference-lab Fork) via SparkRing (switchless NCCL ueber ConnectX-7)
- Quantization: NVFP4-Experten/BF16 (UkisAI)
- Model family: Swift-1.5-Qwen3.8-Flash-Next
- Hardware: dgx-spark x2

## All numbers

- 43.5 tok/s (Everyday; Everyday, 1 request, decode at 16K context (profile table), thinking on, xhigh) — [source](https://github.com/FujitsuPolycom/sparkring#profiles)
- decode_tps: 43.5 (1 request) — [source](https://github.com/FujitsuPolycom/sparkring#profiles)
- decode_tps: 204 (16 parallel requests) — [source](https://github.com/FujitsuPolycom/sparkring#profiles)
- prefill_tps: 3567 (1 request) — [source](https://github.com/FujitsuPolycom/sparkring#profiles)

## Weights

- [ukisai/Swift-1.5-Qwen3.8-Flash-Next-NVFP4](https://huggingface.co/ukisai/Swift-1.5-Qwen3.8-Flash-Next-NVFP4) (main, other)

[https://github.com/FujitsuPolycom/sparkring](https://github.com/FujitsuPolycom/sparkring)

## Related

- [Local AI on your hardware.](https://www.contextstudios.ai/local-ai.md)