Maestro-2-9B-Preview

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Maestro 2 — 9B (Preview)

Math, code, and deep thinking that can see. Now small enough to actually run.

Vection Labs

Weights · Quickstart · Limitations

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Preview release. An early build, published for the people who follow us. This has been trained in parallel with Salience-1.5-Pro, with the same data, but in a smaller model! Bugs you report in the Community tab get fixed in Maestro 2.1.

Abstract

Maestro 2 is a 9B dense multimodal model built for engineering work you can run on one GPU. It thinks natively inside <think> blocks, writes and debugs real code, designs frontends that do not look machine-generated, and reads images, screenshots, diagrams and video as first-class input. Context window: 262,144 tokens.

It is the successor to Maestro 1 — the most-liked model we have shipped — and it keeps that model idea intact: one small brain that reasons, codes, and sees, rather than three specialists you have to switch between.

Highlights

• Native thinking. Real <think> reasoning on by default; switch it off with enable_thinking=False when you want an instant answer.
• Agentic software engineering. Repo-scale edits, methodical debugging, minimal precise patches, well-formed tool calls.
• Frontend and SVG. Modern stacks (React/Next, TypeScript, Tailwind, shadcn/ui), real design tokens and spacing scales, WCAG-accessible semantics, and disciplined SVG geometry.
• Genuinely multimodal. Images and video are inputs, not an afterthought.
• Long context. 262K tokens native.
• Small. 9B dense. One consumer GPU. Apache-2.0.

Model overview

Larger MoE siblings: Maestro-2-9B-Preview (35B-A3B) and Salience-1.5-Flash (30B-A3B).

Thinking

Thinking is on by default — the model reasons inside <think>...</think> before answering, and serving stacks surface it as reasoning_content. Pass enable_thinking=False to apply_chat_template for direct answers.

Tool calling

Maestro 2 emits XML-style tool calls (<tool_call><function=...><parameter=...>), parsed natively by the vLLM and SGLang tool parsers for this model family. Provide schemas through the chat template tools argument.

Quickstart

from transformers import AutoModelForImageTextToText, AutoProcessor

repo = "vectionlabs/Maestro-2-9B-Preview"
proc = AutoProcessor.from_pretrained(repo)
model = AutoModelForImageTextToText.from_pretrained(repo, dtype="auto", device_map="auto")

messages = [{
    "role": "user",
    "content": [{"type": "text", "text": "Build a responsive pricing card in React + Tailwind."}],
}]
text = proc.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
inputs = proc(text=[text], return_tensors="pt").to(model.device)
out = model.generate(**inputs, max_new_tokens=2048)
print(proc.batch_decode(out[:, inputs.input_ids.shape[1]:], skip_special_tokens=True)[0])

Requires a recent transformers (>= 5.8). Images work the same way with {"type": "image", "image": ...} content items.

Running locally

Dense 9B quantizes gracefully, unlike the sparse-MoE tiers of this family:

Prompting tips

• Code: state language, constraints, and the exact I/O contract.
• Frontend: name the stack and the look you want; it returns tokens, semantics and structure.
• SVG: ask for an explicit viewBox and a stated grid; it plans geometry before drawing.
• Vision: put the image before the question in the message content.
• Sampling: temperature=0.7, top_p=0.95, top_k=20, presence_penalty=1.1. Lower the temperature to ~0.3 for precise patches.

Limitations & responsible use

• Maestro 2 can be confidently wrong. Verify factual and mathematical claims.
• Generated code may be insecure or incorrect - review before running, never execute untrusted output.
• 9B is a small model: it will lose to frontier-scale models on the hardest reasoning.
• Preview: known issues are being collected for Maestro 2.1. Pin a revision if you need reproducibility.
• Long-context and video inputs increase latency and memory substantially.
• Do not use it for surveillance, manipulation, or any use violating applicable law or Apache-2.0.
• No audio modality.

Citation

@misc{vectionlabs2026maestro2,
  title  = {Maestro 2 Preview: A 9B Multimodal Engineering Model},
  author = {Vection Labs},
  year   = {2026},
  url    = {https://huggingface.co/vectionlabs/Maestro-2-9B-Preview}
}

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<div align="center">_{(c) 2026 Vection Labs - Apache-2.0}</div>