Qwen3.8-Flash-Next (Reasoning)

by Alibaba Cloud / Qwen Team

Qwen3.8-Flash-Next (Reasoning) is a reasoning model from Alibaba Cloud / Qwen Team, released on August 26, 2026. It ranks #23 of 220 models by Intelligence Score with a score of 48.3.

Qwen3.8-Flash-Next is an open-weight experimental preview of the architecture planned for Qwen4, with Hybrid Attention (QSA), Gated Residual, and N-gram Embedding. The card reports 125B parameters with 6B activated, plus 51B n-gram embedding and 4B MTP; Hugging Face BF16 safetensors total 179,999,981,424 parameters (~180B stored). It is a causal LM with a vision encoder for text, image, and video, a native 262,144-token context extensible to 1,000,000 tokens, and thinking on by default (enable_thinking, preserve_thinking, reasoning_effort). This catalog entry is the open-weight checkpoint, not the separate production Qwen3.8-Flash API on Qwen Cloud.

Key specs

ProviderAlibaba Cloud / Qwen Team
Release date2026-08-26
Licenseopen weights
Intelligence Score48.3
Coding index34.1

Quick answers

Is Qwen3.8-Flash-Next (Reasoning) open source?

Yes. Qwen3.8-Flash-Next (Reasoning) is an open model released under the open weights license.

When was Qwen3.8-Flash-Next (Reasoning) released?

Alibaba Cloud / Qwen Team released Qwen3.8-Flash-Next (Reasoning) on August 26, 2026.

How does Qwen3.8-Flash-Next (Reasoning) compare to Claude Opus 5.5 (Reasoning)?

Qwen3.8-Flash-Next (Reasoning) scores 48.3 on the Intelligence Score versus 60.5 for Claude Opus 5.5 (Reasoning), the current #1.

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