Qwen 3.5 — Pantheon
  
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    # Qwen 3.5

    
Alibaba · Feb 2026
    
The 2026 open-frontier push: 397B-A17B MoE first, then a cascade of smaller sizes within weeks.

    
## Sources

    
### Official

    
tk — to collect
    
### Writing & commentary

    
tk — to collect
    
### Tweets

    
tk — fleet pass pending; mirror to archive

    
## Official record

    

      
- First release 16 Feb 2026 (397B-A17B); 122B-A10B / 35B-A3B / 27B on 24 Feb; small sizes 2 Mar.
      
- tk — fill from primary sources
    

    
## History

    
tk — context of the world at release; events and entanglements

    
## Impressions

    
tk — day-of and longitudinal vibes to collect
    
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