Claude Opus 4.1 vs Qwen3.5-9B
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 Opus 4.1 and Qwen3.5-9B.
Claude Opus 4.1
Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...
Qwen3.5-9B
Qwen3.5-9B is a multimodal foundation model from the Qwen3.5 family, designed to deliver strong reasoning, coding, and visual understanding in an efficient 9B-parameter architecture. It uses a unified vision-language design...
Technical Specifications
| Specification | Claude Opus 4.1 | Qwen3.5-9B |
|---|---|---|
| Provider | Anthropic | Alibaba |
| Context Window | 200,000 tokens | 262,144 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | self hostable |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2025-08-05 | 2026-03-10 |
API Pricing Comparison
Input Price per Million Tokens
Claude Opus 4.1
$15.00
Qwen3.5-9B
$0.10
Output Price per Million Tokens
Claude Opus 4.1
$75.00
Qwen3.5-9B
$0.15
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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 Opus 4.1 Quirks & Gotchas
No developer gotchas reported.
Qwen3.5-9B Quirks & Gotchas
No developer gotchas reported.