Qwen3.5-397B-A17B vs Seed-OSS 36B Instruct
Qwen3.5-397B-A17B (2026) and Seed-OSS 36B Instruct (2025) are frontier reasoning models from Alibaba and ByteDance. Qwen3.5-397B-A17B ships a 262k-token context window, while Seed-OSS 36B Instruct ships a 4k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads. It focuses on practical selection signals rather than broad model-family marketing.
Qwen3.5-397B-A17B fits 66x more tokens; pick it for long-context work and Seed-OSS 36B Instruct for tighter calls.
Decision scorecard
Local evidence first| Signal | Qwen3.5-397B-A17B | Seed-OSS 36B Instruct |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | general production evaluation |
| Decision fit | Coding, RAG, and Agents | General |
| Context window | 262k | 4k |
| Cheapest output | $2.34/1M tokens | - |
| Provider routes | 4 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Qwen3.5-397B-A17B has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Qwen3.5-397B-A17B has broader tracked provider coverage for fallback and procurement flexibility.
- Qwen3.5-397B-A17B uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags Qwen3.5-397B-A17B for Coding, RAG, and Agents.
- Use Seed-OSS 36B Instruct when your own prompt tests beat the comparison signals; the local data does not show a decisive standalone advantage yet.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Qwen3.5-397B-A17B
$897
Cheapest tracked route/tier: OpenRouter
Seed-OSS 36B Instruct
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Qwen3.5-397B-A17B and Seed-OSS 36B Instruct; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
- No overlapping tracked provider route is sourced for Seed-OSS 36B Instruct and Qwen3.5-397B-A17B; plan for SDK, billing, or endpoint changes.
- Qwen3.5-397B-A17B adds Vision, Multimodal, and Reasoning in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-02-16 | 2025-06-01 |
| Context window | 262k | 4k |
| Parameters | 397B | 36B |
| Architecture | MoE | decoder only |
| License | Apache 2.0(OSI) | Proprietary |
| Openness | Open source | Proprietary |
| Commercial use | Commercial use allowed | Commercial use with conditions |
| Knowledge cutoff | - | 2024-10 |
Pricing and availability
| Pricing attribute | Qwen3.5-397B-A17B | Seed-OSS 36B Instruct |
|---|---|---|
| Input price | $0.39/1M tokens | - |
| Output price | $2.34/1M tokens | - |
| Providers |
Capabilities
| Capability | Qwen3.5-397B-A17B | Seed-OSS 36B Instruct |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | Yes | No |
| Function calling | Yes | No |
| Tool use | Yes | No |
| Structured outputs | Yes | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Qwen3.5-397B-A17B, multimodal input: Qwen3.5-397B-A17B, reasoning mode: Qwen3.5-397B-A17B, function calling: Qwen3.5-397B-A17B, tool use: Qwen3.5-397B-A17B, and structured outputs: Qwen3.5-397B-A17B. Both models share the core language-model surface, 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.
Pricing coverage is uneven: Qwen3.5-397B-A17B has $0.39/1M input tokens and Seed-OSS 36B Instruct has no token price sourced yet. Provider availability is 4 tracked routes versus 1. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Qwen3.5-397B-A17B when reasoning depth, larger context windows, and broader provider choice are central to the workload. Choose Seed-OSS 36B Instruct when provider fit 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.
FAQ
Which has a larger context window, Qwen3.5-397B-A17B or Seed-OSS 36B Instruct?
Qwen3.5-397B-A17B supports 262k tokens, while Seed-OSS 36B Instruct supports 4k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Qwen3.5-397B-A17B or Seed-OSS 36B Instruct open source?
Qwen3.5-397B-A17B is listed under Apache 2.0. Seed-OSS 36B Instruct 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 vision, Qwen3.5-397B-A17B or Seed-OSS 36B Instruct?
Qwen3.5-397B-A17B has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, Qwen3.5-397B-A17B or Seed-OSS 36B Instruct?
Qwen3.5-397B-A17B has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for reasoning mode, Qwen3.5-397B-A17B or Seed-OSS 36B Instruct?
Qwen3.5-397B-A17B has the clearer documented reasoning mode signal in this comparison. If reasoning mode 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 Seed-OSS 36B Instruct?
Qwen3.5-397B-A17B is available on OpenRouter, Together AI, Alibaba Cloud PAI-EAS, and Novita AI. Seed-OSS 36B Instruct is available on NVIDIA NIM. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-06-04. Data sourced from public model cards and provider documentation.