ERNIE 5.1
ERNIE 5.1 is an API-only (closed weights) language model from Baidu, released May 9, 2026. Its makers disclosed about 800B parameters.
Today, we officially release ERNIE 5.1. While inheriting the pre-training foundation of ERNIE 5.0, it compresses total parameters to approximately one-third and active parameters to approximately one-half, achieving leading foundational performance at its model scale using only about 6% of the pre-training cost of …
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Lab
Baidu
Released
May 9, 2026
Weights
API-only (closed weights)
Parameters
800B disclosed
Context
–
Price / M tokens
–
Epoch ECI
not yet rated
Benchmark results
Epoch AI has not published results for ERNIE 5.1 yet. New models are usually evaluated within days to weeks.
Links
More from Baidu
ERNIE 5.5 Flash Base · ERNIE 5.5 Flash Base BF16 · ERNIE-4.5-VL-28B-A3B · ERNIE-4.5-300B-A47B · ERNIE-4.5-21B-A3B · ERNIE-4.5-0.3B