Qwen3.5 397B A17B vs Seed 2.1 Pro
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | Qwen3.5-397B-A17B | Seed 2.1 Pro |
|---|---|---|
| Developer | Qwen | ByteDance Seed |
| Family | Qwen3 5 397b A17b | Seed 2 1 |
| Model | Qwen3.5-397B-A17B | Seed 2.1 Pro |
| Version | Qwen3.5-397B-A17B | Seed 2.1 Pro |
| Lifecycle | active | active |
| Released | 2026-02-15 | 2026-06-23 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image | Text, Image, Video |
| Output modalities | Text | Text |
| Context window | 262K | Unknown |
| Total parameters | 403.4B | Unknown |
| Active parameters | 17B | Unknown |
| License | apache-2.0 | Unknown |
| Open weights | Yes | No |
| API available | Yes | Yes |
| Self-hostable | Yes | No |
| Provider access | Deepinfra (Standard), Hugging Face (Standard), Openrouter (Standard), Together Ai (Standard) | Unknown |
| Capabilities | chat, generation, reasoning, tools | agents, chat, computer-use, generation, reasoning, structured_outputs, tools |
12 comparable fields · 9 material differences · Pair passes the primary-source comparison gate
Qwen3.5 397B A17B Capabilities
Seed 2.1 Pro Capabilities
Internal Comparison Graph
Related Comparisons
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| vs | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Qwen3.5 397B A17B vs Seed 2.1 Pro FAQs
Is Qwen3.5 397B A17B or Seed 2.1 Pro better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Qwen3.5 397B A17B and Seed 2.1 Pro, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Qwen3.5 397B A17B or Seed 2.1 Pro?+
Only Qwen3.5 397B A17B has a directly sourced input price: $0.45 per million tokens. Only Qwen3.5 397B A17B has a directly sourced output price: $3.00 per million tokens.
Which has a larger context window, Qwen3.5 397B A17B or Seed 2.1 Pro?+
Neither model has a larger sourced context window in this comparison. Qwen3.5 397B A17B is 262K and Seed 2.1 Pro is —.
Which performs better in benchmarks, Qwen3.5 397B A17B or Seed 2.1 Pro?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Qwen3.5 397B A17B or Seed 2.1 Pro be self-hosted?+
Qwen3.5 397B A17B is the only model in this pair currently marked as self-hostable. Qwen3.5 397B A17B is open weight; Seed 2.1 Pro is not marked open weight.
Can Qwen3.5 397B A17B and Seed 2.1 Pro understand images?+
Qwen3.5 397B A17B is documented with image input; Seed 2.1 Pro is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Qwen3.5 397B A17B or Seed 2.1 Pro?+
Neither has a larger sourced maximum output. Qwen3.5 397B A17B is — and Seed 2.1 Pro is —.
Do Qwen3.5 397B A17B and Seed 2.1 Pro support reasoning and tool use?+
Qwen3.5 397B A17B: reasoning, tool calling, and image input. Seed 2.1 Pro: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Qwen3.5 397B A17B or Seed 2.1 Pro?+
Qwen3.5 397B A17B has 4 sourced provider routes; Seed 2.1 Pro has 0, so Qwen3.5 397B A17B has broader tracked availability.
Which offers better value, Qwen3.5 397B A17B or Seed 2.1 Pro?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.