Skip to content

OmniStep 12A3B — the transitional baseline

Status: ✅ published · HF: sovthpaw/omnistep-12a3b

Identity
Full name OmniStep 12A3B
Type Darwin-merged multimodal baseline (transitional v1)
Total params 12B
Active per token 3B
Context window 8K (configurable)
Modalities text + vision + audio + speech (in + out) + music (out)
Self-evolution no (no Senter agentic core, no Ohm engine)

What it is

The current published baseline. A paper-exact 2-parent Darwin merge of: - Qwen2.5-Omni-3B (multimodal parent: text + Whisper + NaViT + talker + token2wav) - ACE-Step v1.5 XL 4B DiT (music parent: DiT decoder + music text encoder)

The 12A3B naming means 12B total, 3B active.

Quantizations

Quant Size VRAM Best for
F16 6.4GB 6.4GB Maximum quality
Q8_0 3.4GB 3.4GB Near-F16, balanced
Q4_K_M 2.0GB 2.0GB Recommended — best size/quality
Q4_0 1.9GB 1.9GB Smallest

Plus 4 safetensors shards for vllm.

Status: transitional

This is the v1 OmniStep. The new architecture (Senter Ohm 32A8B, OmniSenter 12B, OmniSenterStep) will replace it as it ships.

Use it now as the multimodal baseline. When the new architecture ships, switch over.

See also