PaperBanana

Generate publication-quality academic diagrams and pipeline figures from a paper's methodology section and figure caption. PaperBanana orchestrates a multi-agent pipeline (Retriever, Planner, Stylist, Visualizer, Critic) to produce camera-ready figures suitable for venues like NeurIPS, ICML, and ACL.

Environment Setup

cd <repo-root>
uv pip install -r requirements.txt

Set your API key via environment variable or in configs/model_config.yaml.

Option 1 (Recommended): OpenRouter API key — one key for both text reasoning and image generation:

export OPENROUTER_API_KEY="sk-or-v1-..."

Option 2: Google API key — direct access to Gemini API:

export GOOGLE_API_KEY="your-key-here"

If both keys are configured, OpenRouter is used by default.

Usage

python skill/run.py \
  --content "METHOD_TEXT" \
  --caption "FIGURE_CAPTION" \
  --task diagram \
  --output output.png

Parameters

| Parameter | Required | Default | Description | |-----------|----------|---------|-------------| | --content | Yes* | | Method section text to visualize | | --content-file | Yes* | | Path to a file containing the method text (alternative to --content) | | --caption | Yes | | Figure caption or visual intent | | --task | No | diagram | Task type: diagram | | --output | No | output.png | Output image file path | | --aspect-ratio | No | 21:9 | Aspect ratio: 21:9, 16:9, or 3:2 | | --max-critic-rounds | No | 3 | Maximum critic refinement iterations | | --num-candidates | No | 10 | Number of parallel candidates to generate | | --retrieval-setting | No | auto | Retrieval mode: auto, manual, random, or none | | --main-model-name | No | gemini-3.1-pro-preview | Main model for VLM agents. Provider auto-detected from configured API key | | --image-gen-model-name | No | gemini-3.1-flash-image-preview | Model for image generation. Also supports gemini-3-pro-image-preview | | --exp-mode | No | demo_full | Pipeline: demo_full (with Stylist) or demo_planner_critic (without Stylist) |

*One of --content or --content-file is required.

When --num-candidates > 1, output files are named <stem>_0.png, <stem>_1.png, etc.

Output

The absolute path of each saved image is printed to stdout, one per line.

Examples

Diagram

python skill/run.py \
  --content "We propose a transformer-based encoder-decoder architecture. The encoder consists of 12 self-attention layers with residual connections. The decoder uses cross-attention to attend to encoder outputs and generates the target sequence autoregressively." \
  --caption "Figure 1: Overview of the proposed transformer architecture" \
  --task diagram \
  --output architecture.png

Important Notes

Runtime: A single candidate typically takes 3-10 minutes depending on model and network conditions. With the default 10 candidates running in parallel, expect ~10-30 minutes total. Plan accordingly.
API calls: Each candidate involves multiple LLM calls (Retriever + Planner + Stylist + Visualizer + up to 3 Critic rounds). Candidates run in parallel for efficiency.
Image generation: The Visualizer agent calls an image generation model (Gemini Image) to render diagrams.

About

PaperBanana is based on the PaperVizAgent framework, a reference-driven multi-agent system for automated academic illustration. It was developed as part of the research paper:

PaperBanana: Automating Academic Illustration for AI Scientists Dawei Zhu, Rui Meng, Yale Song, Xiyu Wei, Sujian Li, Tomas Pfister, Jinsung Yoon arXiv:2601.23265

The framework introduces a collaborative team of five specialized agents — Retriever, Planner, Stylist, Visualizer, and Critic — to transform raw scientific content into publication-quality diagrams. Evaluation is conducted on the PaperBananaBench benchmark.