Compare / head-to-head
Claude Sonnet 4.5vs
Qwen3.5 397B-A17B
Qwen3.5 397B-A17B leads 9 of 12 shared benchmarks. Qwen3.5 397B-A17B is 4.3x cheaper per token. Qwen3.5 397B-A17B has the larger context window (262K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
3 – 9
Qwen3.5 397B-A17B leads
Cheaper per token
Qwen3.5 397B-A17B
4.3x cheaper, input + output
Larger context
Qwen3.5 397B-A17B
262K tokens
Providers
2 providers
Anthropic · Qwen
Claude Sonnet 4.5
Anthropic · released 2025-09-29
textvision
Qwen3.5 397B-A17B
Qwen · released 2026-02-15
textvision
Quality
Benchmark matrix
12 shared · 24 only Claude Sonnet 4.5 · 5 only Qwen3.5 397B-A17B| Benchmark | Claude Sonnet 4.5 | Qwen3.5 397B-A17B | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 12 | ||||
| SWE-bench Verified | 77.2% ↗ | 76.4% ↗ | +0.8 pt | Claude Sonnet 4.5 |
| GPQA Diamond | 83.4% ↗ | 88.4% ↗ | -5 pt | Qwen3.5 397B-A17B |
| LMArena Elo | 1456.6 ↗ | 1438.3 ↗ | +18.3 | Claude Sonnet 4.5 |
| Chess Puzzles (Epoch AI run) | 12% ↗epoch run | 13% ↗epoch run | -1 pt | Qwen3.5 397B-A17B |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 23.9% ↗epoch run | 29.5% ↗epoch run | -5.6 pt | Qwen3.5 397B-A17B |
| LMArena WebDev (LMArena) | 1393 ↗ | 1399.4 ↗ | -6.4 | Qwen3.5 397B-A17B |
| Mystery Game Puzzles (Epoch AI run) | 17% ↗epoch run | 18% ↗epoch run | -1 pt | Qwen3.5 397B-A17B |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 77.8% ↗epoch run | 88.9% ↗epoch run | -11.1 pt | Qwen3.5 397B-A17B |
| tau2-bench Airline (Sierra) | 72% ↗ | 81.5% ↗ | -9.5 pt | Qwen3.5 397B-A17B |
| tau2-bench Banking Knowledge (Sierra) | 25.3% ↗ | 9.8% ↗ | +15.5 pt | Claude Sonnet 4.5 |
| tau2-bench Retail (Sierra) | 72.4% ↗ | 84.4% ↗ | -12 pt | Qwen3.5 397B-A17B |
| tau2-bench Telecom (Sierra) | 84.9% ↗ | 97.8% ↗ | -12.9 pt | Qwen3.5 397B-A17B |
| Only Claude Sonnet 4.5 reports · 24 | ||||
| AIME 2025 | 84.2% ↗matharena ⚠ | not reported | — | — |
| Humanity's Last Exam (no tools) | 17.7% ↗ | not reported | — | — |
| ARC-AGI-2 (Verified) | 13.6% ↗ | not reported | — | — |
| EBR-bench (Epoch AI run) | 2.4% ↗epoch run | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 2.4% ↗epoch run | not reported | — | — |
| GDPval-AA | 1276 ↗ | not reported | — | — |
| GSO Opt@1 (GSO) | 12.7% ↗ | not reported | — | — |
| Humanity's Last Exam (with tools) | 33.6% ↗ | not reported | — | — |
| MATH Level 5 (Epoch AI run) | 97.7% ↗epoch run | not reported | — | — |
| MCP Atlas | 43.8% ↗ | not reported | — | — |
| MMMLU | 89.5% ↗ | not reported | — | — |
| MMMU-Pro (no tools) | 63.4% ↗ | not reported | — | — |
| MMMU-Pro (with tools) | 68.9% ↗ | not reported | — | — |
| OSWorld-Verified | 61.4% ↗ | not reported | — | — |
| OSWorld-Verified (XLANG) | 62.9% ↗ | not reported | — | — |
| SAGE (Vals AI) | 36.1% ↗ | not reported | — | — |
| SimpleBench (SimpleBench) | 54.3% ↗ | not reported | — | — |
| SimpleQA Verified | 30.7% ↗epoch run | not reported | — | — |
| SWE-bench Verified (Epoch AI run) | 71.3% ↗epoch run | not reported | — | — |
| Tau2-bench Retail | 86.2% ↗ | not reported | — | — |
| Tau2-bench Telecom | 98% ↗ | not reported | — | — |
| Terminal-Bench 2.0 | 51% ↗ | not reported | — | — |
| Vending-Bench 2 (Andon Labs) | 3838.74 ↗ | not reported | — | — |
| WeirdML (Håvard Tveit Ihle) | 47.7% ↗ | not reported | — | — |
| Only Qwen3.5 397B-A17B reports · 5 | ||||
| MMLU-Pro | not reported | 87.8% ↗ | — | — |
| AIME 2026 | not reported | 94.2% ↗matharena ⚠ | — | — |
| APEX-Agents (Mercor) | not reported | 24.9% ↗ | — | — |
| LMArena Vision (LMArena) | not reported | 1246.9 ↗ | — | — |
| Toolathlon-Verified (HKUST) | not reported | 40.7% ↗ | — | — |
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 Claude Sonnet 4.5 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 | Claude Sonnet 4.5 | Qwen3.5 397B-A17B | Edge |
|---|---|---|---|
| Context window | 200K tokens | 262K tokens | Qwen3.5 397B-A17B |
| Max output | 64K tokens | — | — |
| Input price / 1M | $3 ↗ | $0.6 ↗ | Qwen3.5 397B-A17B |
| Output price / 1M | $15 ↗ | $3.6 ↗ | Qwen3.5 397B-A17B |
| Cached input / 1M | $0.3 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $18 | $4.2 | Qwen3.5 397B-A17B |
| Modalities | text · vision | text · vision | Tie |
| Released | 2025-09-29 | 2026-02-15 | — |
| Cited benchmark scores | 43 | 22 | — |
Reliability
Provider status
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Which one wins on your data?
Public benchmarks are a starting point. Run Claude Sonnet 4.5 and Qwen3.5 397B-A17B on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.