Qwen3.8 (2.4T params) Announced as Upcoming Open-Weight Model

Melvin Vivas · X post · 2026-07-20 · Open on X

Topics: Industry Trends & Job Market, LLM Fundamentals · Level: beginner

Summary

Melvin Vivas reacts to Qwen announcing Qwen3.8. The quoted post says it has 2.4T parameters and will soon be released with open weights. Qwen says it is close to frontier models and second only to Fable 5. These are the vendor's own claims, so treat them as unverified.

Key points

• Qwen3.8 is said to have about 2.4 trillion parameters.
• Qwen says the model will become open-weight soon.
• Qwen calls it second only to Fable 5 among current models.
• The creator reads this as Chinese open models closing the gap with frontier models.

Resources mentioned

• Qwen3.8 · tool · qwen.ai · free
  Upcoming large Qwen model (2.4T parameters) that Qwen says will be released with open weights.
  Also in: SGLang v0.5.19 release: new models and beam search (Melvin Vivas on X · notes), Qwen3.8-Max on the Frontend Code Arena cost-performance frontier (Melvin Vivas on X · notes), Qwen3.8-Max announced with open weights for Max and 27B (Melvin Vivas on X · notes), Qwen3.8 Open-Weight Launch Announcement Reaction (Melvin Vivas on X · notes)
• Fable 5 · tool · anthropic.com · paid
  A frontier model used as the comparison point in the Claude Opus 5 announcement; the post gives no other details about it.
  Also in: Claude Opus 5.5 in Devin: #1 on FrontierCode 1.1 (Melvin Vivas on X · notes), Creator's Top 3 Closed Models: Fable 5, GPT 5.6 Sol, Grok 4.6 (Melvin Vivas on X · notes), Opus 5 vs Fable 5: Cost per Task in Cursor Benchmarks (Melvin Vivas on X · notes), Opus 5 Beats Fable 5 on Cost per Task and Tokens (Melvin Vivas on X · notes) and 7 more