Claude Sonnet 4.6 vs Qwen3.5 Plus 2026-04-20
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Claude Sonnet 4.6 and Qwen3.5 Plus 2026-04-20.
Claude Sonnet 4.6
Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with...
Qwen3.5 Plus 2026-04-20
Qwen3.5 Plus (April 2026) is a large-scale multimodal language model from Alibaba. It accepts text, image, and video input and produces text output, with a 1M token context window. This...
Technical Specifications
| Specification | Claude Sonnet 4.6 | Qwen3.5 Plus 2026-04-20 |
|---|---|---|
| Provider | Anthropic | Alibaba |
| Context Window | 1,000,000 tokens | 1,000,000 tokens |
| Agent Suitability | 94/100 | N/A |
| Time to First Token (TTFT) | 350 ms | N/A |
| Deployment Model | managed api | self hostable |
| Production Stability | stable | beta |
| API Available | Yes | Yes |
| Released Date | 2026-02-17 | 2026-04-27 |
API Pricing Comparison
Input Price per Million Tokens
Claude Sonnet 4.6
$3.00
Qwen3.5 Plus 2026-04-20
$0.30
Output Price per Million Tokens
Claude Sonnet 4.6
$15.00
Qwen3.5 Plus 2026-04-20
$1.80
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Claude Sonnet 4.6 Quirks & Gotchas
- ▸Best balance of speed and capability — default for most Claude integrations
- ▸Computer-use (beta) feature enables autonomous UI interaction
Qwen3.5 Plus 2026-04-20 Quirks & Gotchas
No developer gotchas reported.