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Software · head to head

Black Forest Labs vs PaintTool SAI

Black Forest Labs logo

Black Forest Labs

Software

Frontier AI lab behind the FLUX family of image, video, and audio generation models

From
$0.17/month
Rated
-
Full reviewWebsite
PaintTool SAI logo

PaintTool SAI

Software

Lightweight digital painting and illustration software for Windows

From
5500/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Black Forest Labs open weights licensing tiers (Builder, Platform, Professional) do not list public prices, requiring sales contact for most volumes.; PaintTool SAI windows-only software with no native Mac or Linux version.
  • They diverge on capability: Black Forest Labs covers FLUX 3 image generation, PaintTool SAI covers Pressure-Sensitive Tablet Support.

Where they differ

Only the attributes on which Black Forest Labs and PaintTool SAI actually diverge.

Attributes where Black Forest Labs and PaintTool SAI differ
AttributeBlack Forest LabsPaintTool SAI
Starting price$0.17/month5500/month
Pricing modelusage-basedone-time
Platformsweb, apiwindows

Identical on both: free tier (No), user rating (Not yet rated), category (Unknown).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Black Forest Labs

  • FLUX 3 image generation
  • Video generation
  • Synchronized audio generation
  • Open weights
  • Action-prediction
  • Fine-tuning and LoRA rights
  • Pricing calculator

Only in PaintTool SAI

  • Pressure-Sensitive Tablet Support
  • Anti-Aliased Brushes
  • 16-bit ARGB Color Channels
  • Lightweight Performance
  • Crash Data Protection

What people use each for

The jobs each tool is most often brought in to do.

Black Forest Labs

  • Generating high-fidelity images via API for production appsnot PaintTool SAI
  • Self-hosting open-weight FLUX models on private infrastructurenot PaintTool SAI
  • Producing short branded video clips with synchronized audionot PaintTool SAI
  • Robotics research using action-prediction modelsnot PaintTool SAI

PaintTool SAI

  • Digital illustration and manga artnot Black Forest Labs
  • Line art and inking with pressure-sensitive pensnot Black Forest Labs
  • Lightweight painting on lower-spec computersnot Black Forest Labs
  • Character and concept art sketchingnot Black Forest Labs

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Black Forest Labs

  • Open weights licensing tiers (Builder, Platform, Professional) do not list public prices, requiring sales contact for most volumes.
  • Video generation pricing per second can become costly for longer or higher-resolution outputs compared to subscription-based competitors.
  • No consumer subscription plan; pricing is oriented toward developers and enterprises rather than casual creators.

PaintTool SAI

  • Windows-only software with no native Mac or Linux version.
  • Only supports 32-bit operation, lacking modern 64-bit performance benefits.
  • Lacks the advanced brush engine customization and layer effects found in tools like Photoshop or Clip Studio Paint.
  • No cloud sync or mobile app, unlike many modern illustration tools.

Pricing, plan by plan

Black Forest Labs

$0.17/month
  • API (video)$0.17/month
    • $0.17 per second of generated video
  • Builder$undefined/mo
    • FLUX.2 [klein] models
    • 10K images/month
    • 1 domain, 10 licensed users
  • Platform$undefined/mo
    • FLUX.2 [klein] 9B + FLUX.2 [dev]
    • 100K images/month
    • 1 domain, 10 licensed users
  • Professional$undefined/mo
    • FLUX.2 [dev] open weights license
    • 100K images/month
    • Up to 3 domains, 10 licensed users

PaintTool SAI

5500/month
  • Standard License$5500/month
    • Perpetual license
    • All 1.x.x minor updates
    • Free upgrade path to version 2

Which should you pick?

Choose Black Forest Labs if

  • You need flux 3 image generation.
  • You work on web, api.
  • You also want video generation.
Black Forest Labs review

Choose PaintTool SAI if

  • You need pressure-sensitive tablet support.
  • You work on windows.
  • You also want anti-aliased brushes.
PaintTool SAI review

Questions people ask

Is Black Forest Labs or PaintTool SAI better?
Neither clearly leads. Black Forest Labs starts at $0.17/month and PaintTool SAI at 5500/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Black Forest Labs or PaintTool SAI?
Black Forest Labs starts at $0.17/month and PaintTool SAI at 5500/month.
Does Black Forest Labs or PaintTool SAI run on more platforms?
Black Forest Labs runs on web, api. PaintTool SAI runs on windows.
What is Black Forest Labs best used for?
Black Forest Labs is most often used for generating high-fidelity images via api for production apps, self-hosting open-weight flux models on private infrastructure, producing short branded video clips with synchronized audio, robotics research using action-prediction models. Of those, generating high-fidelity images via api for production apps and self-hosting open-weight flux models on private infrastructure are not what PaintTool SAI is typically brought in for.
What can Black Forest Labs do that PaintTool SAI cannot?
Black Forest Labs covers FLUX 3 image generation, Video generation, Synchronized audio generation, Open weights. PaintTool SAI covers Pressure-Sensitive Tablet Support, Anti-Aliased Brushes, 16-bit ARGB Color Channels, Lightweight Performance.

Answered from the vendors’ own pages

Black Forest Labs: How much does Black Forest Labs' API cost?

The API is pay-as-you-go with no subscription required; video generation costs $0.17 per second, so a 5-second HD clip costs about $0.85.

Source
PaintTool SAI: Is there a free trial for PaintTool SAI?

Yes, PaintTool SAI offers a 31-day free trial with full functionality before requiring purchase of a license.

Source
Black Forest Labs: Is there a free plan?

No free tier is offered; the pricing page lists only pay-as-you-go API usage and paid open-weights licensing tiers starting with Builder.

Source
PaintTool SAI: What does the license cover?

The one-time 5,500 JPY purchase provides a perpetual license covering all minor updates within version 1.x.x; a major version 2 upgrade is offered for free.

Source
Black Forest Labs: What do the open-weights licensing tiers include?

Builder includes FLUX.2 [klein] models with 10K images/month for one domain; Platform and Professional raise the cap to 100K images/month and add FLUX.2 [dev] access and fine-tuning rights.

Source
PaintTool SAI: What operating systems are supported?

PaintTool SAI runs on Windows XP through Windows 11, but only in 32-bit mode, requiring at least a 450MHz Pentium processor and 256MB of RAM.

Source
Black Forest Labs: Can I self-host FLUX models?

Yes, open weights licenses let teams download and self-host FLUX.2 [klein] and FLUX.2 [dev] models on their own infrastructure under the Builder, Platform, and Professional tiers.

Source
Black Forest Labs: How do I get enterprise or high-volume pricing?

Enterprise plans covering custom volume, all model releases, and SLA guarantees are not published and require contacting Black Forest Labs' sales team directly.

Source
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