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ModelCap

Head-to-head comparison

Qwen3.5 397B A17B vs Qwen3.8 27B

Qwen3.5 397B A17B (Qwen) and Qwen3.8 27B (Qwen) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 17 August 2026

As of 17 August 2026, Qwen3.8 27B holds the stronger ModelCap Index position (#16 vs #27); and Qwen3.5 397B A17B is 1.4× cheaper per output token ($2.34/1M vs $3.20/1M).

Which should you choose?

Choose Qwen3.5 397B A17B if…

  • API cost matters — $2.34/1M output tokens against $3.20/1M, about 1.4× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.39/1M against $0.45/1M.
  • you want provider choice — 11 listed API providers against 3.

Choose Qwen3.8 27B if…

  • you want the stronger overall ModelCap Index position — #16 against #27 (69.6 vs 62.3 points).
  • Artificial Analysis Intelligence Index is your yardstick — 52.0 against 34.3.
  • you want the more recently listed model — Qwen3.8 27B was listed 14 August 2026, Qwen3.5 397B A17B 16 February 2026.

Qwen3.5 397B A17B vs Qwen3.8 27B: specs, pricing and context

Specification comparison of Qwen3.5 397B A17B and Qwen3.8 27B
FieldQwen3.5 397B A17BQwenQwen3.8 27BQwen
ModelCap Index position#27#16
Index score62.369.6
EvidenceMeasuredMeasured
Input price / 1M tokens$0.39$0.45
Output price / 1M tokens$2.34$3.20
Context window262K tokens262K tokens
Max output tokens66K131K
API providers listed113
Weight accessOpen weightsOpen weights
Input modalitiesText, Image, VideoText, Image, Video
First listed16 February 202614 August 2026
PublisherQwenQwen

Evidence: 3 public benchmark observations across 3 boards · 1 public benchmark observation across 1 board. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Qwen3.5 397B A17B vs Qwen3.8 27B

Public benchmark boards where Qwen3.5 397B A17B or Qwen3.8 27B has a published result
BoardQwen3.5 397B A17BQwen3.8 27BLeads
Arena codingArena (LMArena)14911486–1497—Only one result
Artificial Analysis Intelligence IndexArtificial Analysis34.3intelligence-index52.0intelligence-indexQwen3.8 27B

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Qwen3.5 397B A17B vs Qwen3.8 27B: common questions

Is Qwen3.5 397B A17B better than Qwen3.8 27B?

Qwen3.8 27B ranks higher on the ModelCap Index as of 17 August 2026: #16 against #27. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it.

Is Qwen3.5 397B A17B cheaper than Qwen3.8 27B?

Qwen3.5 397B A17B is cheaper on output tokens: $2.34/1M against $3.20/1M. Input tokens are $0.39/1M for Qwen3.5 397B A17B and $0.45/1M for Qwen3.8 27B. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Qwen3.5 397B A17B or Qwen3.8 27B?

Both publish a 262K-token context window.

Which is better for coding, Qwen3.5 397B A17B or Qwen3.8 27B?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are Qwen3.5 397B A17B and Qwen3.8 27B open-weight models?

Qwen3.5 397B A17B: Open weights. Qwen3.8 27B: Open weights. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Qwen3.5 397B A17B and Qwen3.8 27B?

ModelCap currently lists 11 API providers for Qwen3.5 397B A17B and 3 for Qwen3.8 27B, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Qwen3.5 397B A17B vs Qwen3.8 27B comparison?

Every figure comes from the sealed ModelCap dataset published 17 August 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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