What is the difference between Qwen3.5 27B and Qwen3.5 397B A17B?

Both are developed by Qwen but target different use cases. Qwen3.5 27B has a 262K token context window vs Qwen3.5 397B A17B's 262K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Qwen3.5 27B or Qwen3.5 397B A17B?

It depends on your use case. Qwen3.5 27B and Qwen3.5 397B A17B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Qwen3.5 27B cost compared to Qwen3.5 397B A17B?

Qwen3.5 27B costs $0.3/M input tokens and Qwen3.5 397B A17B costs $0.6/M input tokens. Qwen3.5 27B is $0.30/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Qwen3.5 27B and Qwen3.5 397B A17B on Rival?

This page shows a side-by-side comparison of Qwen3.5 27B and Qwen3.5 397B A17B across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Feb 2026

Qwen3.5 27BvsQwen3.5 397B A17B

Qwen3.5 27B is cheaper than Qwen3.5 397B A17B at $0.3/M vs $0.6/M input tokens.

Qwen3.5 27B and Qwen3.5 397B A17B compared across 53 shared prompts
Spec	Qwen3.5 27B	Qwen3.5 397B A17B
Input price	$0.3/M tokens	$0.6/M tokens
Output price	$2.4/M tokens	$3.6/M tokens
Context window	262K tokens	262K tokens
Parameters	27B	397B (17B active)
Weights	Open	Open
Free API (OpenRouter)	No	No
Released	Feb 2026	Feb 2026
SWE-bench Verified	72.4%	76.4%