ERNIE 5.5 Flash Preview
Baidu put ERNIE 5.5 Flash Preview, a post-trained 280B mixture-of-experts model with 14B active parameters and 1M context, on its Qianfan API, with open weights promised by November 25.
This is the first post-trained version built on ERNIE-5.5-Flash-Base, which Baidu open-sourced earlier in November. It adds reasoning and tool calling and, per OpenRouter, generates more than 200 tokens per second. Baidu calls it an intermediate result of post-training and says the formal release will be refined from real-world feedback.
- Date
- Tuesday 10 November 2026
- Lab
- Baidu
- Kind
- model
- Access
- closed API
- Price
- Free on OpenRouter ($0 in / $0 out per M tokens)
Figures
| Measure | Value | Measured by |
|---|---|---|
| Total parameters | 280B | company |
| Active parameters | 14B per token | company |
| Context window | 1M tokens | company |
| Generation speed | >200 tokens/s as described on OpenRouter | company |
Baidu promises open weights by November 25, but a public download could not be confirmed on November 11. Pandaily dates the release November 11, while OpenRouter and the Qianfan list show November 10.
Sources
- pandaily.com/baidu-ernie-5-5-flash-preview-qianfan-api-weights-promised
- openrouter.ai/baidu/ernie-5.5-flash-preview:free
- technode.com/2026/11/12/baidu-opens-api-access-to-ernie-5-5-flash-preview/
This record was checked and corrected against its sources on 11 November 2026. How we check