Qwen3.5-397B-A17B vs Qwen3.5-Flash
Qwen3.5-397B-A17B (2026) and Qwen3.5-Flash (2026) are general-purpose language models from Alibaba. Qwen3.5-397B-A17B ships a 262K-token context window, while Qwen3.5-Flash ships a 1M-token context window. On pricing, Qwen3.5-Flash costs $0.1/1M input tokens versus $0.39/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing. The goal is to make the tradeoff clear before deeper testing.
Qwen3.5-Flash is ~290% cheaper at $0.1/1M; pay for Qwen3.5-397B-A17B only for provider fit.
Specs
| Released | 2026-02-16 | 2026-02-23 |
| Context window | 262K | 1M |
| Parameters | 397B | — |
| Architecture | MoE | - |
| License | Apache 2.0 | Proprietary |
| Knowledge cutoff | - | - |
Pricing and availability
| Qwen3.5-397B-A17B | Qwen3.5-Flash | |
|---|---|---|
| Input price | $0.39/1M tokens | $0.1/1M tokens |
| Output price | $2.34/1M tokens | $0.4/1M tokens |
| Providers |
Capabilities
| Qwen3.5-397B-A17B | Qwen3.5-Flash | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on structured outputs: Qwen3.5-397B-A17B. Both models share multimodal input, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Qwen3.5-397B-A17B lists $0.39/1M input and $2.34/1M output tokens, while Qwen3.5-Flash lists $0.1/1M input and $0.4/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Qwen3.5-Flash lower by about $0.78 per million blended tokens. Availability is 1 providers versus 1, so concentration risk also matters.
Choose Qwen3.5-397B-A17B when provider fit are central to the workload. Choose Qwen3.5-Flash when long-context analysis, larger context windows, and lower input-token cost are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency. For teams standardizing a stack, that distinction is often the difference between a benchmark win and a reliable deployment.
FAQ
Which has a larger context window, Qwen3.5-397B-A17B or Qwen3.5-Flash?
Qwen3.5-Flash supports 1M tokens, while Qwen3.5-397B-A17B supports 262K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is cheaper, Qwen3.5-397B-A17B or Qwen3.5-Flash?
Qwen3.5-Flash is cheaper on tracked token pricing. Qwen3.5-397B-A17B costs $0.39/1M input and $2.34/1M output tokens. Qwen3.5-Flash costs $0.1/1M input and $0.4/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Qwen3.5-397B-A17B or Qwen3.5-Flash open source?
Qwen3.5-397B-A17B is listed under Apache 2.0. Qwen3.5-Flash is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for multimodal input, Qwen3.5-397B-A17B or Qwen3.5-Flash?
Both Qwen3.5-397B-A17B and Qwen3.5-Flash expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for structured outputs, Qwen3.5-397B-A17B or Qwen3.5-Flash?
Qwen3.5-397B-A17B has the clearer documented structured outputs signal in this comparison. If structured outputs is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Qwen3.5-397B-A17B and Qwen3.5-Flash?
Qwen3.5-397B-A17B is available on OpenRouter. Qwen3.5-Flash is available on Alibaba Cloud PAI-EAS. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Continue comparing
Last reviewed: 2026-04-24. Data sourced from public model cards and provider documentation.