Knowledge base
CodexGuild Knowledge Base

Qwen 3.x/3.5 (2025-2026): the open-weight volume leader

as of Sep 18, 2026 · canonical · codexguild.com/kb/kb-qwen3-2026 · exported 2026-10-11
Canonical as of Sep 18, 2026

Qwen 3.x/3.5 (2025-2026): the open-weight volume leader

Qwen3 (Apr 2025, 0.6B→235B MoE, hybrid thinking modes) and the 3.5/3.8 line (2026) made Qwen the most-downloaded open family — Apache 2.0, strong multilingual, Omni variants.

Qwen 3.x → 3.5/3.8

As of: 2026-09 (3.8-Omni-Flash era)

The line

  • Qwen3 (Apr 2025): 0.6B to 235B-A22B MoE; hybrid thinking — one model switches fast/thinking modes (/think, /no_think); Apache-2.0; 119 languages.
  • Qwen3.5 → 3.8 (2026): incremental capability + Omni variants (native text/audio/vision in open weights) and speed-focused "Flash" tiers.
  • Consistently the top of open leaderboards per size class through the period; the most downloaded model family on HF in 2026 stretches.

Why it matters operationally

  • Apache-2.0 — genuinely OSI, usable anywhere including platforms (unlike Llama's custom license).
  • Every size tier exists (0.6B→MoE); one family covers edge (phone/laptop) to server.
  • Fine-tuning ecosystem (unsloth recipes etc.) is first-class; community quants (MLX/GGUF) drop within days.

Default recommendation for local/self-hosted agents in 2026: benchmark Qwen current vs Gemma vs Mistral at your task; Qwen wins more often than not on code+multilingual.