Swift 1.5 Qwen3.8 Flash Next

At the default Q2_0, 0 of 148 phones have enough estimated usable memory; 0 also reach 3+ tokens/s. On Mac, 11 of 54 exact configurations pass using that quant or a smaller tracked fallback.

Params
125B (6B active)
Family
swift
Released
2026-09
Tags
chat · coding · vision · reasoning

Downloads & memory by quant

The download is only the weights — add KV cache and runtime to get what your phone actually needs. “Memory-fit” only means it can load; “usable” also requires an estimated 3+ tokens/s. Each row uses that row's quant. ★ = recommended.

QuantDownloadMemory neededPhone reality
Q2_0 ★66.5 GB~79.2 GB0 memory-fit

Swift 1.5 Qwen3.8 Flash Next at Q2_0 on 148 phones

This table is fixed to the recommended Q2_0, on each phone's largest RAM option. Counts for smaller quants above will differ. All phones are shown, sorted by fit and estimated experience; tap one for the full report.

PhoneChip · RAMNeedsSpeedVerdict

~ = bandwidth-based estimate · ✓ = measured on real hardware

Swift 1.5 Qwen3.8 Flash Next on 54 Mac configurations

Each Mac uses the recommended Q2_0 at 4K context when it fits, or the largest smaller tracked quant that fits. Each row links to the full report with a macOS-specific setup guide.

MacUnified memoryQuantWorking budgetNeedsEstimated speedVerdict

FAQ

How much RAM do I need to run Swift 1.5 Qwen3.8 Flash Next on a phone?

At Q2_0, Swift 1.5 Qwen3.8 Flash Next needs ~79.2GB of usable memory (weights + KV cache + runtime). In practice that means no current Android phone or no current iPhone — iOS lets a single app use less of its RAM than Android does.

How fast does Swift 1.5 Qwen3.8 Flash Next run on a flagship phone?

It doesn't fit on any of the 148 phones we track at Q2_0 — it needs ~79.2GB of usable memory.

Can an iPhone run Swift 1.5 Qwen3.8 Flash Next?

Not really: the best iPhone we track (iPhone 16 Pro Max) has ~5.2GB usable, but Swift 1.5 Qwen3.8 Flash Next needs 79.2GB at Q2_0.

What is the best quantization of Swift 1.5 Qwen3.8 Flash Next for mobile?

Q2_0 (66.5GB download) is the size/quality sweet spot. Total memory needed is ~79.2GB once the KV cache and runtime are counted — the download size alone understates it.

How many phones can run Swift 1.5 Qwen3.8 Flash Next?

0 of the 148 phones we track have enough estimated usable memory at Q2_0; 0 also reach our usable-speed threshold of 3 tokens/s, and 0 run smoothly. Memory-fit alone does not mean a good experience.

Which Macs can run Swift 1.5 Qwen3.8 Flash Next?

11 of the 54 exact Mac configurations we track have enough estimated working memory. Each Mac uses the recommended Q2_0 when it fits, or the largest smaller tracked quant that fits, and separates installed unified memory, the macOS reserve, and estimated speed.

What is Swift 1.5 Qwen3.8 Flash Next good for on a phone?

It's tagged for chat, coding, vision, reasoning. At 125B parameters (6B active — it's a MoE, so it decodes faster than its size suggests), it prioritizes answer quality over speed — expect slower decoding.

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