Qwen3.5 397B A17B
Qwen
qwen/qwen3.5-397b-a17bQwen3.5 397B-A17B is the largest and first-released model in Alibaba's Qwen3.5 mixture-of-experts generation, targeting flagship-level reasoning, coding, and agentic performance among open-weight models.
Cost rate
0.5x
Context
262K
Released
Feb 16, 2026
Input
TextImageVideo
Output
Text
Support
ReasoningTool callingStructured outputs
Best at
The categories where this model ranks highest.
Image understanding
#42 · top 29%
Mathematical
#54 · top 15%
Life, Physical, & Social Science
#70 · top 18%
Software & IT Services
#75 · top 19%
Performance
Median latency and throughput measured across recent requests.
Throughput83 tok/s
Latency