Is Qwen3.8 27B Flex or Qwen3.5 397B Fast cheaper?

Qwen3.8 27B Flex is cheaper on output tokens ($2.08 vs $4.14 per 1M).

Which has the larger context window, Qwen3.8 27B Flex or Qwen3.5 397B Fast?

Both models offer a similar context window.

Qwen3.8 27B Flex vs Qwen3.5 397B Fast

Qwen3.8 27B Flex is cheaper on output tokens. Choose Qwen3.8 27B Flex or Qwen3.5 397B Fast based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Qwen3.8 27B Flex	Qwen3.5 397B Fast
Provider	Neuralwatt	Neuralwatt
Input / 1M tokens	$0.29	$0.69
Output / 1M tokens	$2.08	$4.14
Context window	262K	262K
Parameters	—	—
Open weights	Yes	Yes
Released	Aug 2026	Feb 2026

Qwen3.8 27B Flex details →Qwen3.5 397B Fast details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.