Compare / head-to-head
Claude Sonnet 4.5vsQwen3.6-Flash
Claude Sonnet 4.5 leads 3 of 4 shared benchmarks. Qwen3.6-Flash is 15.6x cheaper per token. Qwen3.6-Flash has the larger context window (1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
3 – 1
Claude Sonnet 4.5 leads
Cheaper per token
Qwen3.6-Flash
15.6x cheaper, input + output
Larger context
Qwen3.6-Flash
1M tokens
Provider uptime (30d)
100% · —
Anthropic · Qwen
Claude Sonnet 4.5
Anthropic · released 2025-09-29
textvision
Qwen3.6-Flash
Qwen · released 2026-04-16
textvision
Quality
Benchmark matrix
4 shared · 16 only Claude Sonnet 4.5 · 0 only Qwen3.6-Flash| Benchmark | Claude Sonnet 4.5 | Qwen3.6-Flash | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 4 | ||||
| GPQA Diamond | 83.4% ↗ | 83.3% ↗epoch | +0.1 pt | Claude Sonnet 4.5 |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 23.9% ↗epoch | 17.2% ↗epoch | +6.7 pt | Claude Sonnet 4.5 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 77.8% ↗epoch | 84.4% ↗epoch | -6.6 pt | Qwen3.6-Flash |
| SimpleQA Verified | 30.7% ↗epoch | 15.9% ↗epoch | +14.8 pt | Claude Sonnet 4.5 |
| Only Claude Sonnet 4.5 reports · 16 | ||||
| SWE-bench Verified | 77.2% ↗ | not reported | — | — |
| 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 | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 2.4% ↗epoch | not reported | — | — |
| GDPval-AA | 1276 ↗ | not reported | — | — |
| Humanity's Last Exam (with tools) | 33.6% ↗ | 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 | — | — |
| SWE-bench Verified (Epoch AI run) | 71.3% ↗epoch | not reported | — | — |
| Tau2-bench Retail | 86.2% ↗ | not reported | — | — |
| Tau2-bench Telecom | 98% ↗ | not reported | — | — |
| Terminal-Bench 2.0 | 51% ↗ | not reported | — | — |
| Only Qwen3.6-Flash reports · 0 | ||||
| Qwen3.6-Flash reports nothing Claude Sonnet 4.5 does not. | ||||
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 Qwen3.6-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 4.5 | Qwen3.6-Flash | Edge |
|---|---|---|---|
| Context window | 200K tokens | 1M tokens | Qwen3.6-Flash |
| Max output | 64K tokens | — | — |
| Input price / 1M | $3 ↗ | $0.165 ↗ | Qwen3.6-Flash |
| Output price / 1M | $15 ↗ | $0.99 ↗ | Qwen3.6-Flash |
| Cached input / 1M | $0.3 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $18 | $1.16 | Qwen3.6-Flash |
| Modalities | text · vision | text · vision | Tie |
| Released | 2025-09-29 | 2026-04-16 | — |
| Cited benchmark scores | 21 | 4 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Sonnet 4.5 vs …
Models sharing the most benchmarksMore matchups
Qwen3.6-Flash vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Claude Sonnet 4.5 and Qwen3.6-Flash on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.