Maestro1-9B

VectionLabs Maestro 1 Banner

A 9B multimodal reasoning model — math, code, and deep thinking that can see.

Vection Labs

Weights · Benchmarks · Quickstart · Limitations


Abstract

Maestro1-9B is a dense, 9-billion-parameter vision-language model built for hard problems: multi-step mathematical proof, competitive-programming-grade code synthesis, and visual reasoning over images and video — within a single model and a single context window of up to 1M tokens.

It is designed for users who care less about chat pleasantries and more about whether the model can actually solve the thing: derive the bound, find the bug, read the diagram, finish the proof. Maestro1-9B pairs an explicit step-by-step reasoning mode with native multimodal perception, so the same chain of thought that solves a math olympiad problem can also reason about a chart, a UI screenshot, or a short clip.

Highlights

  • Reasoning-first. Produces structured, inspectable chains of thought for math, logic, and code.
  • Genuinely multimodal. Images and video are first-class inputs, not bolted-on captioning.
  • Long context. Up to 1M tokens via interleaved multimodal RoPE — whole codebases, long papers, or long videos in a single prompt.
  • Open weights. Apache-2.0, transformers-native, single-file deployment.
  • 9B dense. Runs on a single modern accelerator; no mixture-of-experts routing to manage.

Model overview

Parameters 9B (dense)
Modalities text, image, video → text
Context window up to 1,000,000 tokens (interleaved multimodal RoPE)
Precision bfloat16
Architecture decoder-only transformer LM + native vision encoder
License Apache-2.0
Library 🤗 transformers (AutoModelForImageTextToText)

Intended use

Maestro1-9B targets technical assistance and research:

  • Step-by-step math and quantitative reasoning.
  • Code generation, explanation, debugging, and review.
  • Visual question answering and document/diagram/chart understanding.
  • Video understanding over short clips.
  • Long-document and long-context analysis.

It is not intended for high-stakes decisions without human review, nor as a source of truth for medical, legal, or financial advice.

Benchmarks

Reasoning, math & code

Benchmark Setting Maestro1-9B
GSM8K 0-shot CoT, exact match —
MATH-500 0-shot CoT, exact match —
AIME 2024 0-shot, pass@1 —
HumanEval 0-shot, pass@1 —
MBPP 3-shot, pass@1 —
MMLU 0-shot —

Multimodal

Benchmark Setting Maestro1-9B
MMMU (val) 0-shot —
MathVista (testmini) 0-shot —
DocVQA (val) 0-shot, ANLS —

Quickstart

from transformers import AutoModelForImageTextToText, AutoProcessor
import torch

model_id = "vectionlabs/Maestro1-9B"
proc = AutoProcessor.from_pretrained(model_id)
model = AutoModelForImageTextToText.from_pretrained(
    model_id, dtype=torch.bfloat16, device_map="auto"
)

messages = [{
    "role": "user",
    "content": [
        {"type": "image", "image": "https://example.com/diagram.png"},
        {"type": "text", "text": "Explain what this diagram proves, step by step."},
    ],
}]

text = proc.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
from qwen_vl_utils import process_vision_info
imgs, vids = process_vision_info(messages)
inputs = proc(text=[text], images=imgs, videos=vids, return_tensors="pt").to(model.device)
out = model.generate(**inputs, max_new_tokens=1024)
print(proc.batch_decode(out[:, inputs.input_ids.shape[1]:], skip_special_tokens=True)[0])

Text-only works the same way with a plain {"type": "text", ...} message.

Prompting tips

  • For math/logic, ask the model to reason step by step; it is tuned to externalize its work.
  • For code, specify language, constraints ("no external libraries"), and the exact I/O contract.
  • For vision, put the image/video before the question in the message content.
  • Lower temperature (0.2–0.7) for deterministic reasoning; raise it for brainstorming.

Deployment

  • GPU: a single 24–80 GB GPU in bf16 (device_map="auto").
  • Serving: compatible with standard transformers generation; for high throughput use a vision-capable serving stack.

Limitations & responsible use

  • Maestro1-9B can be confidently wrong. Verify mathematical and factual claims.
  • Generated code may be insecure or incorrect — review before running, never execute untrusted output.
  • Long-context and long-video inputs increase latency and memory substantially.
  • It inherits the biases and failure modes of large web-trained models. Do not use it for surveillance, manipulation, or any use that violates applicable law or the Apache-2.0 terms.
  • No audio modality.

Citation

@misc{vectionlabs2026maestro1,
  title  = {Maestro1-9B: A Multimodal Reasoning Model},
  author = {Vection Labs},
  year   = {2026},
  url    = {https://huggingface.co/vectionlabs/Maestro1-9B}
}

© 2026 Vection Labs · Apache-2.0
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