Baidu releases ERNIE 5.5 Flash Preview with 280B parameters and 1M context
Released November 11, ERNIE 5.5 Flash Preview has 280B total and 14B active parameters, plus a 1M-token context. Its Qianfan API is live. Baidu plans to release weights by November 25; post-training is still ongoing.
Baidu released ERNIE 5.5 Flash Preview on November 11, 2026, the first post-trained version of its earlier Flash Base model.
Specifications
| Item | Official specification |
|---|---|
| Total parameters | 280B |
| Active parameters | 14B |
| Context | 1M tokens |
| Status | Intermediate post-training preview |
Tools and demonstrations
Official examples cover coding, game development, Blender modeling and knowledge work inside agent frameworks. These are tool-assisted workflows, rather than evidence that the model directly generates native video or 3D files.
Access and planned weights
The API is live on Baidu Qianfan, and the announcement links to OpenRouter. Baidu plans to release weights by November 25, 2026. This future commitment should not be read as confirmation that weights are already downloadable. Check the eventual release for availability and license terms.
Preview limitations
Baidu says post-training continues and some capability gaps may remain. TboxIO recommends testing tool reliability, long-running execution and total cost on real tasks.
This article summarizes the official announcement. Demonstrations are vendor-provided; TboxIO has not independently tested the model.
Sources
Source labels distinguish official claims, third-party tests, and in-house tests.