Alibaba says Qwen3.8 is the world’s No.2 AI model. It has shown no proof.

Days after a rival Chinese lab shook Silicon Valley, Alibaba has fired back. The company previewed Qwen3.8, its most powerful model yet, and made a bold claim: it trails only one model on Earth.

Alibaba unveiled the model at the World Artificial Intelligence Conference in Shanghai. Its Qwen team said on X that Qwen3.8 is “second only to Fable 5,” a nod to Anthropic’s latest release. Alibaba shares rose as much as 5.4% on Monday.

The model holds 2.4 trillion parameters. That makes it the first in the Qwen family above a trillion to be multimodal, meaning it handles images, video and documents as well as text.

Alibaba says Qwen3.8 should beat its own previous flagship, especially at coding and office work such as full-stack development and data analysis. Lead developer Shuai Bai called it the team’s first trillion-parameter multimodal model, with understanding that he said matches or beats leading proprietary systems.

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The preview is available now. It runs through Alibaba’s Token Plan subscription and its Qoder developer tools, priced at 10% of the standard rate during the trial. Full open weights are promised “soon,” with no date and no licence terms yet.

Here is the catch. Alibaba offered no benchmark scores, no model card, and no independent test to back the “second only to Fable 5” billing, SiliconANGLE reported.

That is a shift for the company. Its last flagship, Qwen3.7-Max, shipped in May with a full set of published results. This one arrived with none.

The gap matters because the comparison is Alibaba’s own. No public leaderboard has scored Qwen3.8. On LMArena, where Fable 5 sits at number one, the older Qwen3.7-Max ranks well down the list. The weights, once released, would let outside researchers check the claim. For now, they cannot.

The timing is no accident. The launch came three days after Moonshot released Kimi K3, a 2.8-trillion-parameter open model that topped a major coding leaderboard and rattled US chip stocks. Alibaba’s move reads as a direct answer, The Decoder noted.

A cluster of Chinese labs is now shipping models at a scale once reserved for the biggest US labs. Moonshot has Kimi K3. Zhipu has GLM-5.2. All are chasing the frontier, and most are handing out their weights for free.