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 improvements across sy…
Model details →Anthropic: Claude Sonnet 4.5 vs Qwen: Qwen3.5 Plus 2026-02-15
Qwen: Qwen3.5 Plus 2026-02-15 wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
The Qwen3.5 native vision-language series Plus models are built on a hybrid architecture that integrates linear attention mechanisms with sparse mixture-of-experts models, achieving higher inference efficiency. In a variety of task evaluati…
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Sonnet 4.5 | Qwen: Qwen3.5 Plus 2026-02-15 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1M | Tie |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $3.00 | $0.26 | 🏆 Qwen: Qwen3.5 Plus 2026-02-15 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $15.00 | $1.56 | 🏆 Qwen: Qwen3.5 Plus 2026-02-15 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Anthropic: Claude Sonnet 4.5 better than Qwen: Qwen3.5 Plus 2026-02-15?
Qwen: Qwen3.5 Plus 2026-02-15 wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Anthropic: Claude Sonnet 4.5 and Qwen: Qwen3.5 Plus 2026-02-15?
Input: $3.00 vs $0.26 per 1M tokens. Output: $15.00 vs $1.56 per 1M tokens.
What context windows do Anthropic: Claude Sonnet 4.5 and Qwen: Qwen3.5 Plus 2026-02-15 support?
Anthropic: Claude Sonnet 4.5 supports up to 1M tokens. Qwen: Qwen3.5 Plus 2026-02-15 supports up to 1M tokens.
Do both Anthropic: Claude Sonnet 4.5 and Qwen: Qwen3.5 Plus 2026-02-15 support tool calling?
Anthropic: Claude Sonnet 4.5: yes. Qwen: Qwen3.5 Plus 2026-02-15: yes.