Claude Fable 5.1 vs Qwen 2.5 Max
A direct, empirical evaluation of Claude Fable 5.1 (Anthropic) against Qwen 2.5 Max (Alibaba Cloud).
Claude Fable 5.1
Developed by Anthropic · Proprietary Frontier parameters
Full-repository software refactoring, agentic tool workflows, formal verification, and 1.5M-token needle retrieval.
Qwen 2.5 Max
Developed by Alibaba Cloud · Proprietary (~700B) parameters
Cross-lingual document extraction and structured structured output generation.
| Metric | Claude Fable 5.1 | Qwen 2.5 Max |
|---|---|---|
| SWE-bench Verified | 82.8% | 51.4% |
| MMLU-Pro | 92.4% | 77.2% |
| MATH-500 | 97.9% | 89.4% |
| Context Window | 1,500,000 tokens | 128,000 tokens |
| Input Pricing (per 1M) | $12.00 | $1.60 |
| Output Pricing (per 1M) | $60.00 | $6.40 |
Architectural & Practical Deployment Analysis
Evaluating Claude Fable 5.1 (Anthropic) alongside Qwen 2.5 Max (Alibaba Cloud) highlights key technical trade-offs across neural parameter scale and compute efficiency. Claude Fable 5.1 executes across Proprietary Frontier total parameters with Dynamic Recurrent MoE active per token, whereas Qwen 2.5 Max operates on Proprietary (~700B) parameters with Dense/MoE Hybrid active per token.
On SWE-bench Verified software engineering tasks, Claude Fable 5.1 achieves 82.8% autonomous resolution rate, compared to 51.4% for Qwen 2.5 Max. On complex reasoning benchmarks, Claude Fable 5.1 posts 92.4% on MMLU-Pro and 97.9% on MATH-500, against 77.2% and 89.4% respectively for Qwen 2.5 Max.
From an operational economics perspective, processing 10,000,000 mixed tokens (7M input / 3M output) costs approximately $264.00 on Claude Fable 5.1 versus $30.40 on Qwen 2.5 Max.
Recommendation: Deploy Claude Fable 5.1 when your infrastructure prioritizes full-repository software refactoring, agentic tool workflows, formal verification, and 1.5m-token needle retrieval.. Deploy Qwen 2.5 Max when workload requirements favor cross-lingual document extraction and structured structured output generation..