Compare / head-to-head
Qwen3.5 27BvsQwen3.5 397B-A17B
Qwen3.5 397B-A17B leads 5 of 5 shared benchmarks. Qwen3.5 27B is 1.6x cheaper per token. Both offer a 262K-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 5
Qwen3.5 397B-A17B leads
Cheaper per token
Qwen3.5 27B
1.6x cheaper, input + output
Larger context
Tie
both 262K tokens
Provider uptime (30d)
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Qwen
Qwen3.5 27B
Qwen
textvision
Qwen3.5 397B-A17B
Qwen · released 2026-02-15
textvision
Quality
Benchmark matrix
5 shared · 0 only Qwen3.5 27B · 2 only Qwen3.5 397B-A17B| Benchmark | Qwen3.5 27B | Qwen3.5 397B-A17B | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 5 | ||||
| SWE-bench Verified | 75% ↗ | 76.4% ↗ | -1.4 pt | Qwen3.5 397B-A17B |
| GPQA Diamond | 85.5% ↗ | 88.4% ↗ | -2.9 pt | Qwen3.5 397B-A17B |
| MMLU-Pro | 86.1% ↗ | 87.8% ↗ | -1.7 pt | Qwen3.5 397B-A17B |
| AIME 2026 | 91.7% ↗matharena ⚠ | 94.2% ↗matharena ⚠ | -2.5 pt | Qwen3.5 397B-A17B |
| LMArena Elo | 1408.1 ↗ | 1438.3 ↗ | -30.2 | Qwen3.5 397B-A17B |
| Only Qwen3.5 27B reports · 0 | ||||
| Qwen3.5 27B reports nothing Qwen3.5 397B-A17B does not. | ||||
| Only Qwen3.5 397B-A17B reports · 2 | ||||
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 29.5% ↗epoch | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | not reported | 88.9% ↗epoch | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Qwen3.5 27B minus Qwen3.5 397B-A17B in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Qwen3.5 27B | Qwen3.5 397B-A17B | Edge |
|---|---|---|---|
| Context window | 262K tokens | 262K tokens | Tie |
| Max output | — | — | — |
| Input price / 1M | $0.086 ↗ | $0.172 ↗ | Qwen3.5 27B |
| Output price / 1M | $0.688 ↗ | $1.03 ↗ | Qwen3.5 27B |
| Cached input / 1M | — | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $0.774 | $1.2 | Qwen3.5 27B |
| Modalities | text · vision | text · vision | Tie |
| Released | — | 2026-02-15 | — |
| Cited benchmark scores | 5 | 8 | — |
Reliability
Qwen status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Qwen3.5 27B vs …
Models sharing the most benchmarksMore matchups
Qwen3.5 397B-A17B vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Qwen3.5 27B and Qwen3.5 397B-A17B on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.