Compare / head-to-head
Claude Sonnet 4.6vsQwen3.5-Flash
Claude Sonnet 4.6 leads 4 of 4 shared benchmarks. Qwen3.5-Flash is 57x cheaper per token. Both offer a 1M-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
4 – 0
Claude Sonnet 4.6 leads
Cheaper per token
Qwen3.5-Flash
57x cheaper, input + output
Larger context
Tie
both 1M tokens
Provider uptime (30d)
100% · —
Anthropic · Qwen
Claude Sonnet 4.6
Anthropic · released 2026-02-17
textvision
Qwen3.5-Flash
Qwen · released 2026-02-23
textvision
Quality
Benchmark matrix
4 shared · 14 only Claude Sonnet 4.6 · 1 only Qwen3.5-Flash| Benchmark | Claude Sonnet 4.6 | Qwen3.5-Flash | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 4 | ||||
| GPQA Diamond | 89.9% ↗ | 82.3% ↗epoch | +7.6 pt | Claude Sonnet 4.6 |
| LMArena Elo | 1458.3 ↗ | 1397.7 ↗ | +60.6 | Claude Sonnet 4.6 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 85.8% ↗epoch | 84.4% ↗epoch | +1.4 pt | Claude Sonnet 4.6 |
| SimpleQA Verified | 35.5% ↗epoch | 20.3% ↗epoch | +15.2 pt | Claude Sonnet 4.6 |
| Only Claude Sonnet 4.6 reports · 14 | ||||
| SWE-bench Verified | 79.6% ↗ | not reported | — | — |
| Humanity's Last Exam (no tools) | 33.2% ↗ | not reported | — | — |
| ARC-AGI-2 (Verified) | 58.3% ↗ | not reported | — | — |
| GDPval-AA | 1633 ↗ | not reported | — | — |
| Humanity's Last Exam (with tools) | 49% ↗ | not reported | — | — |
| MCP Atlas | 61.3% ↗ | not reported | — | — |
| MMMLU | 89.3% ↗ | not reported | — | — |
| MMMU-Pro (no tools) | 74.5% ↗ | not reported | — | — |
| MMMU-Pro (with tools) | 75.6% ↗ | not reported | — | — |
| OSWorld-Verified | 72.5% ↗ | not reported | — | — |
| SWE-bench Verified (Epoch AI run) | 75.2% ↗epoch | not reported | — | — |
| Tau2-bench Retail | 91.7% ↗ | not reported | — | — |
| Tau2-bench Telecom | 97.9% ↗ | not reported | — | — |
| Terminal-Bench 2.0 | 59.1% ↗ | not reported | — | — |
| Only Qwen3.5-Flash reports · 1 | ||||
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 9.5% ↗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 Claude Sonnet 4.6 minus Qwen3.5-Flash 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 4.6 | Qwen3.5-Flash | Edge |
|---|---|---|---|
| Context window | 1M tokens | 1M tokens | Tie |
| Max output | 128K tokens | — | — |
| Input price / 1M | $3 ↗ | $0.029 ↗ | Qwen3.5-Flash |
| Output price / 1M | $15 ↗ | $0.287 ↗ | Qwen3.5-Flash |
| Cached input / 1M | $0.3 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $18 | $0.316 | Qwen3.5-Flash |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-02-17 | 2026-02-23 | — |
| Cited benchmark scores | 19 | 5 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Sonnet 4.6 vs …
Models sharing the most benchmarksMore matchups
Qwen3.5-Flash vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Claude Sonnet 4.6 and Qwen3.5-Flash on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.