Claude Sonnet 4.5 vs Qwen Plus 0728 (thinking)
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 4.5 and Qwen Plus 0728 (thinking).
Claude Sonnet 4.5
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
Qwen Plus 0728 (thinking)
Qwen Plus 0728, based on the Qwen3 foundation model, is a 1 million context hybrid reasoning model with a balanced performance, speed, and cost combination.
Technical Specifications
| Specification | Claude Sonnet 4.5 | Qwen Plus 0728 (thinking) |
|---|---|---|
| Provider | Anthropic | Alibaba |
| Context Window | 1,000,000 tokens | 1,000,000 tokens |
| Agent Suitability | 91/100 | N/A |
| Time to First Token (TTFT) | 380 ms | N/A |
| Deployment Model | managed api | self hostable |
| Production Stability | stable | beta |
| API Available | Yes | Yes |
| Released Date | 2025-09-29 | 2025-09-08 |
API Pricing Comparison
Input Price per Million Tokens
Claude Sonnet 4.5
$3.00
Qwen Plus 0728 (thinking)
$0.26
Output Price per Million Tokens
Claude Sonnet 4.5
$15.00
Qwen Plus 0728 (thinking)
$0.78
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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 4.5 Quirks & Gotchas
- ▸Excellent for long-form writing and nuanced document analysis
- ▸Slightly slower than Sonnet 4.6 — upgrade for production agentic use
Qwen Plus 0728 (thinking) Quirks & Gotchas
No developer gotchas reported.