# OpenBMB Releases MiniCPM5-2B and Opens Its Training Data and Reinforcement Learning Stack

The 2.52-billion-parameter model averages 53.9 across 34 benchmarks and ships under Apache 2.0 alongside the pretraining corpora, supervised datasets and reinforcement learning samples used to build it.

- Published: 2026-09-08T06:18:45.692Z
- Canonical: https://polylog.news/ai/2026-09-08/openbmb-releases-minicpm5-2b-and-opens-its-training-data-and
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Polylog editors](https://polylog.news)

OpenBMB released MiniCPM5-2B, a dense, 2.52-billion-parameter reasoning model under the Apache 2.0 license, built for on-device and resource-constrained deployment. The company says it ranks first among open-source models under four billion…

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