BLOSSOM-V6.2

💻Github • 🚀Blossom Chat Demo

Introduction

Blossom is a powerful open-source conversational large language model that provides reproducible post-training data, dedicated to delivering an open, powerful, and cost-effective locally accessible general-purpose model for everyone.

Hint: Across the vast majority of use cases, Blossom-V6.2-36B outperforms Blossom-V6.2-32B.

You can find the training data here: Blossom-V6.2-SFT-Stage1 (1 epoch)、Blossom-V6.2-SFT-Stage2 (3 epoch).

Data Synthesis Workflow Overview

Primarily employs three cost-effective models: Deepseek-V3.1, Gemini 2.5 Flash, and Qwen3-235B-A22B-Instruct-2507 (denoted as A, B, C)—to regenerate responses under different scenarios using tailored synthesis strategies.

For example:

• In objective scenarios like mathematics (where answers are unique), Model A first generates responses as a “teacher.” If reference answers exist in the source data, Model B verifies the correctness of A’s responses against them. If no reference answers exist, Model C generates a second response, and Model B checks consistency between A and C’s outputs. Inconsistent responses are filtered out.
• For subjective scenarios, three models cross-evaluate each other. For instance, Models A and B generate responses to a question, and Model C evaluates which is better. The superior response may be retained as training data or used for preference data construction. To mitigate model bias, roles (respondent/evaluator) are randomly assigned to A, B, and C in each instance.

Additional rule-based filtering is applied, such as:

• N-Gram filtering to remove data with many repetitions.
• Discarding questions containing toxic content that triggers teacher model refusals.

Further technical details will be released in the future. The data is synthesized by the 🌸BlossomData framework.