NEXS-qwen2.5-7b-multislerp

NEXS Qwen2.5-7B Multi-SLERP Merge

A multi-SLERP merge of Qwen2ForCausalLM domain experts covering code and math, produced with mergekit. Part of the NEXS multi-SLERP merge collection.

Method

Multi-SLERP (multislerp) performs barycentric spherical interpolation on a hypersphere for more than two models: it projects the models into the tangent space at their weighted Euclidean mean, interpolates, and projects back. Here it is run in task-vector space — each source's delta from the shared base model is computed, the deltas are spherically averaged with equal weight (normalize_weights: true, eps: 1e-8), and the result is added back to the base. Merging was done with mergekit.

All variants share an identical vocabulary (152064); no tokenizer reconciliation was needed.

Sources

Base model (task-vector reference): Qwen/Qwen2.5-7B

Merged variants (equal weight 1.0 each):

• Qwen/Qwen2.5-Coder-7B-Instruct
• Qwen/Qwen2.5-Math-7B

mergekit config

merge_method: multislerp
base_model: Qwen/Qwen2.5-7B
tokenizer_source: base
dtype: float32
out_dtype: bfloat16
parameters:
  normalize_weights: true
  eps: 1.0e-8
models:
  - model: Qwen/Qwen2.5-Coder-7B-Instruct
    parameters: {weight: 1.0}
  - model: Qwen/Qwen2.5-Math-7B
    parameters: {weight: 1.0}