Compare / head-to-head
Claude Sonnet 5vsQwen3.5 27B
Claude Sonnet 5 leads 2 of 2 shared benchmarks. Qwen3.5 27B is 15.5x cheaper per token. Claude Sonnet 5 has the larger context window (1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
2 – 0
Claude Sonnet 5 leads
Cheaper per token
Qwen3.5 27B
15.5x cheaper, input + output
Larger context
Claude Sonnet 5
1M tokens
Provider uptime (30d)
100% · —
Anthropic · Qwen
Claude Sonnet 5
Anthropic · released 2026-06-30
textvision
Qwen3.5 27B
Qwen
textvision
Quality
Benchmark matrix
2 shared · 6 only Claude Sonnet 5 · 3 only Qwen3.5 27B| Benchmark | Claude Sonnet 5 | Qwen3.5 27B | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 2 | ||||
| SWE-bench Verified | 85.2% ↗ | 75% ↗ | +10.2 pt | Claude Sonnet 5 |
| GPQA Diamond | 90.5% ↗epoch | 85.5% ↗ | +5 pt | Claude Sonnet 5 |
| Only Claude Sonnet 5 reports · 6 | ||||
| Humanity's Last Exam (no tools) | 43.2% ↗ | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 29.3% ↗epoch | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 65.6% ↗epoch | not reported | — | — |
| Humanity's Last Exam (with tools) | 57.4% ↗ | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 94.7% ↗epoch | not reported | — | — |
| SimpleQA Verified | 33.7% ↗epoch | not reported | — | — |
| Only Qwen3.5 27B reports · 3 | ||||
| MMLU-Pro | not reported | 86.1% ↗ | — | — |
| AIME 2026 | not reported | 91.7% ↗matharena ⚠ | — | — |
| LMArena Elo | not reported | 1408.1 ↗ | — | — |
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 5 minus Qwen3.5 27B 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 5 | Qwen3.5 27B | Edge |
|---|---|---|---|
| Context window | 1M tokens | 262K tokens | Claude Sonnet 5 |
| Max output | 128K tokens | — | — |
| Input price / 1M | $2 ↗ | $0.086 ↗ | Qwen3.5 27B |
| Output price / 1M | $10 ↗ | $0.688 ↗ | Qwen3.5 27B |
| Cached input / 1M | $0.2 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $12 | $0.774 | Qwen3.5 27B |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-06-30 | — | — |
| Cited benchmark scores | 8 | 5 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Sonnet 5 vs …
Models sharing the most benchmarksMore matchups
Qwen3.5 27B vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Claude Sonnet 5 and Qwen3.5 27B on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.