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Ideogram 4 Instant — OrbitQuant W2A4

This is a compact OrbitQuant transformer-component artifact derived from fal/ideogram-v4-instant. It contains the single conditional Instant transformer only. The NF4 Qwen3-VL text encoder, VAE, tokenizer, and scheduler are loaded from the pinned official Ideogram components repository; the base and unconditional transformers from that repository are not loaded.

Modified model and non-commercial license. model.safetensors contains OrbitQuant-packed derivatives of the fal BF16 weights. This is not an official Ideogram or fal product and is not endorsed, approved, or validated by either organization. Use and redistribution are limited to the Ideogram 4 Non-Commercial Model Agreement included as LICENSE.md.

What is included

Recipe: W2A4 (w2a4 base precision with mixed-width protection)
Minimum OrbitQuant runtime: v0.8.0
Source revision: a548f3dc66285ea0da1ed299383a131f37dfcb6b
Components revision: 1874bc70267ba2c823a7239e1d70dd308c8d64dc
Universal policy coverage: 241 OrbitQuant projections, 34 AdaLN INT4 modules, and 4 BF16 skips
Effective OrbitQuant weight widths: 52 W2 projections, 130 W3 projections, and 59 W4 boundary or out-of-block projections
Calibration data: none
Artifact size: 3.760 GB

Install and load

The fal checkpoint was published before its single-branch Diffusers changes landed upstream. Diffusers 0.39.0 still tries to access the absent unconditional_transformer. This repository therefore includes a narrow, idempotent compatibility patch that changes behavior only when that component is None and preserves the native nonzero terminal sigma.

pip install "orbitquant[hf]>=0.9.0,<1" "diffusers==0.39.0" \
  "transformers>=5.13,<6" "bitsandbytes>=0.49" accelerate
hf download WaveCut/Ideogram-v4-Instant-OrbitQuant-W2A4 scripts/patch_diffusers_ideogram4_instant.py \
  --local-dir ./ideogram4-w2a4
python ./ideogram4-w2a4/scripts/patch_diffusers_ideogram4_instant.py

The default native packed runtime provisions its matching wheel on first use. The optional Triton extra is not required for this load path and should only be added when its Triton requirement is compatible with the installed PyTorch.

import json
import torch
from diffusers import Ideogram4Pipeline, Ideogram4Transformer2DModel
from huggingface_hub import snapshot_download
from orbitquant.artifacts import load_orbitquant_artifact

artifact_dir = snapshot_download("WaveCut/Ideogram-v4-Instant-OrbitQuant-W2A4")
config = Ideogram4Transformer2DModel.load_config(
    "fal/ideogram-v4-instant",
    subfolder="transformer",
    revision="a548f3dc66285ea0da1ed299383a131f37dfcb6b",
)

old_dtype = torch.get_default_dtype()
torch.set_default_dtype(torch.bfloat16)
try:
    with torch.device("cuda"):
        transformer = Ideogram4Transformer2DModel.from_config(config)
finally:
    torch.set_default_dtype(old_dtype)

load_orbitquant_artifact(
    transformer,
    artifact_dir,
    device="cuda",
    runtime_mode="auto_fused",
    activation_kernel_backend="auto",
)
pipe = Ideogram4Pipeline.from_pretrained(
    "ideogram-ai/ideogram-4-nf4-diffusers",
    revision="1874bc70267ba2c823a7239e1d70dd308c8d64dc",
    transformer=transformer,
    unconditional_transformer=None,
    torch_dtype=torch.bfloat16,
).to("cuda")

caption = {
    "high_level_description": "A bold typographic poster centered on exact words.",
    "compositional_deconstruction": {
        "background": "Warm white paper with even studio lighting.",
        "elements": [{
            "type": "text",
            "text": "ORBIT QUANT",
            "desc": "Large crisp black and orange geometric lettering.",
        }],
    },
}
image = pipe(
    json.dumps(caption, ensure_ascii=False, separators=(",", ":")),
    height=1024,
    width=1024,
    num_inference_steps=8,
    mu=0.0,
    std=1.75,
    generator=torch.Generator("cuda").manual_seed(42),
).images[0]
image.save("ideogram4-instant-orbitquant-w2a4.png")

Guidance arguments are intentionally omitted: fal distilled CFG into the single conditional branch.

Original vs OrbitQuant benchmark

Both sides use the exact same structured JSON prompt, seed, 1024×1024 resolution, 8 steps, mu=0.0, and std=1.75. The BF16 original was generated once and reused as the paired baseline for every recipe in the collection. The measured environment was a Vast.ai NVIDIA RTX 6000 Ada 48 GB with PyTorch 2.9.1+cu128, CUDA 12.8, Diffusers 0.39.0, Transformers 5.13.1, bitsandbytes 0.49.2, and the native W3 packed CUDA kernel.

Metric	BF16 original	OrbitQuant W2A4
Shared components load	`2.242 s`	same pinned components
Transformer/artifact load	`3.536 s`	`5.931 s`
Estimated cold pipeline load	`5.778 s`	`8.173 s`
First generation	`13.043 s`	`13.557 s`
Hot median generation	`13.273 s`	`13.394 s`
Peak CUDA allocated	`28.225 GB`	`13.437 GB`
Nonempty 1024×1024 outputs	`10/10`	`10/10`

The timing and memory figures are measurements from this release host, not universal performance claims. Low-bit recipes can visibly change detail, composition, or typography; inspect the paired matrix rather than relying on a single aggregate score.

Comparison prompt set

#	Stress case	Seed	Exact required text
1	Fine-detail astrolabe	`41001`	-
2	Layered character composition	`41002`	-
3	Exact counting and choreography	`41003`	-
4	Dense color and object binding	`41004`	-
5	Nested spatial relationships	`41005`	-
6	Cinematic night-market panorama	`41006`	-
7	Editorial Latin typography	`41007`	ORBIT QUANT DATA WITHOUT CALIBRATION
8	Russian Constructivist typography	`41008`	КВАНТОВАЯ ОРБИТА МОСКВА 2049 КВАНТОВАНИЕ
9	Japanese typography and mixed style	`41009`	量子の軌道東京の未来
10	Chinese typography, reflection, and occlusion	`41010`	量子轨道未来之城

Exact structured JSON captions

Fine-detail astrolabe: {"high_level_description":"A museum-grade macro photograph of a single ornate brass astronomical clock with mechanically coherent detail.","compositional_deconstruction":{"background":"Black velvet with dramatic Rembrandt lighting and shallow atmospheric falloff.","elements":[{"type":"obj","desc":"One ornate brass astronomical clock covered with interlocking gears, engraved constellations, enamel moon phases, hair-thin hands, tiny screws, worn gilt edges, and dust caught in the mechanisms; extreme material detail, large-format photography."}]}}
Layered character composition: {"high_level_description":"A lacquered white android and an elderly watchmaker jointly repair a mechanical hummingbird in a crowded Art Nouveau workshop.","compositional_deconstruction":{"background":"Rain and a passing tram are visible through the workshop window; hundreds of tools and clock parts fill the midground under cinematic tungsten and cyan light.","elements":[{"type":"obj","desc":"A lacquered white android on the left, leaning toward the workbench with intricate but anatomically coherent hands."},{"type":"obj","desc":"An elderly watchmaker on the right, facing the android with a detailed expressive face and careful hands."},{"type":"obj","desc":"A mechanical hummingbird centered between them, held over the workbench; coherent mirror reflections and editorial realism."}]}}
Exact counting and choreography: {"high_level_description":"Exactly seven masked dancers perform on exactly seven separate illuminated platforms inside a flooded opera house.","compositional_deconstruction":{"background":"A vast baroque opera house with balconies reflected in dark water, floating candles, volumetric stage haze, and readable background architecture.","elements":[{"type":"obj","desc":"Exactly seven dancers and no extra people, one dancer per platform, alternating crimson and ivory costumes from left to right, each in a distinct pose; sharp theatrical photography."}]}}
Dense color and object binding: {"high_level_description":"An elaborate surreal fashion tableau with exactly three models and strict color-object pairings.","compositional_deconstruction":{"background":"A rococo greenhouse with rare orchids, patterned tile floor, and prismatic sunlight, rendered with magazine-cover precision.","elements":[{"type":"obj","desc":"The left model wears a cobalt-blue coat and holds a yellow glass sphere."},{"type":"obj","desc":"The center model wears a saffron dress and holds a green ceramic pyramid."},{"type":"obj","desc":"The right model wears an emerald suit and holds a red velvet cube; preserve every color-object pairing exactly."}]}}
Nested spatial relationships: {"high_level_description":"A meticulous isometric cutaway diorama of a vertical city with nested spatial relationships.","compositional_deconstruction":{"background":"Architectural-section drawing mixed with photoreal materials, dozens of tiny rooms, stairs and people, with a yellow airship passing behind the entire structure.","elements":[{"type":"obj","desc":"A glass greenhouse sits directly above a silver subway car."},{"type":"obj","desc":"A red fox stands inside the greenhouse beneath a hanging moon lamp."},{"type":"obj","desc":"A violinist waits below the subway platform; clean depth and unambiguous vertical ordering."}]}}
Cinematic night-market panorama: {"high_level_description":"A sweeping cinematic panorama of a rain-soaked floating night market at blue hour with deep focus and coherent perspective.","compositional_deconstruction":{"background":"A terraced megacity rises through mist beneath a storm, with hundreds of warm windows, wet reflections, steam, umbrellas, ropes and signage.","elements":[{"type":"obj","desc":"In the foreground, a chef plates translucent dumplings under a red silk canopy."},{"type":"obj","desc":"In the midground, children chase paper lanterns across narrow bridges while merchants unload exotic fruit from wooden boats; realistic faces, anamorphic highlights, documentary-level detail."}]}}
Editorial Latin typography: {"high_level_description":"A sophisticated Swiss International Style exhibition poster photographed behind slightly reflective museum glass.","compositional_deconstruction":{"background":"Strict modular grid, red, black and white screenprint, tiny registration marks, embossed paper fibers, dramatic gallery shadows, and no other text.","elements":[{"type":"text","text":"ORBIT QUANT","desc":"The exact large uppercase headline ORBIT QUANT in sharp geometric sans-serif letterforms."},{"type":"text","text":"DATA WITHOUT CALIBRATION","desc":"The exact smaller subtitle DATA WITHOUT CALIBRATION, crisp and correctly ordered."}]}}
Russian Constructivist typography: {"high_level_description":"A richly detailed Russian Constructivist science-fiction poster with crisp exact Cyrillic lettering.","compositional_deconstruction":{"background":"Diagonal red and black geometry on cream paper, a cosmonaut portrait, orbital diagrams, halftone grain, folded corners, layered ink, and no additional text.","elements":[{"type":"text","text":"КВАНТОВАЯ ОРБИТА","desc":"The exact dominant Cyrillic headline КВАНТОВАЯ ОРБИТА."},{"type":"text","text":"МОСКВА 2049","desc":"The exact subtitle МОСКВА 2049."},{"type":"text","text":"КВАНТОВАНИЕ","desc":"A small exact stamp reading КВАНТОВАНИЕ."}]}}
Japanese typography and mixed style: {"high_level_description":"An elaborate Japanese art magazine cover combining Edo woodblock printing with a futuristic Tokyo skyline.","compositional_deconstruction":{"background":"Giant indigo waves curl around glass towers, red-crowned cranes cross a gold moon, tiny pedestrians and trains fill the lower streets, with visible washi fibers and layered spot colors.","elements":[{"type":"text","text":"量子の軌道","desc":"The exact balanced vertical title 量子の軌道 in precise Japanese glyphs."},{"type":"text","text":"東京の未来","desc":"The exact subtitle 東京の未来 in a clean editorial layout."}]}}
Chinese typography, reflection, and occlusion: {"high_level_description":"A luxurious Chinese retro-futurist department-store window at night with exact typography, layered reflections, and deliberate occlusion.","compositional_deconstruction":{"background":"Multiple glass layers, silk textures, blue-and-white porcelain, passing bicycles, cinematic rain, and fine product-photography detail.","elements":[{"type":"obj","desc":"A curved chrome robot is partly occluded by peonies; the calligraphy and neon street reflect coherently across its body."},{"type":"text","text":"量子轨道","desc":"The exact gold title 量子轨道."},{"type":"text","text":"未来之城","desc":"The exact red subtitle 未来之城."}]}}

Quantization manifest

Method: orbitquant
Bits: W2A4
Effective weight widths: W2: 52, W3: 130, W4: 59
Runtime mode: auto_fused
Activation kernel backend: auto
Weight quantization backend: triton_cuda
Target policy: universal
Rotation: rpbh, seed 0
Block size: paper
Codebook: lloyd_max version 2
AdaLN policy: int4_rtn_group64_bf16_activation, group size 64

Files

model.safetensors: packed OrbitQuant weights plus required BF16 state
quantization_config.json, orbitquant_manifest.json, model_index.json
orbitquant_codebooks.safetensors, orbitquant_rotations.safetensors
benchmark/summary.json: compact paired timing and memory summary
assets/image_generation_comparison_matrix.webp: visible 10-prompt comparison
prompts.json: exact structured captions, seeds, and inference settings
LICENSE.md, NOTICE, MODIFICATIONS.md: license and derivative notices
SHA256SUMS: checksums for the published tree

Limitations

Non-commercial use only under the included agreement.
This is a transformer-component artifact, not a standalone pipeline.
Source and components are gated; accept both upstream access agreements.
Today the included Diffusers 0.39 compatibility patch is required for the fal Instant single-branch path. Remove it once equivalent upstream support is released and revalidated.
W2A4 is the base recipe name; this artifact deliberately uses mixed W2/W3/W4 weights to keep the universal 34-block transformer stable.
Runtime speed depends on a compatible native packed kernel; use the explicit reference mode only for debugging or compatibility.
The matrix is native paired output evidence, not a GenEval/FID claim.