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Black Forest Labs

FLUX.1 Fill [pro]

VS
Black Forest Labs

FLUX.2 Klein 9B

Analysis By: The WhichLLMModel Editorial Team|Updated: June 2026

Self-Hosted Local Rig vs Cloud API Matrix

Metric / Spec
FLUX.2 Klein 9BOpen Source
FLUX.1 Fill [pro]Cloud API
Pricing Model$0.00 / token (Free Weights)$5.00 / 1M Tokens
Hardware Needed8–16GB VRAMNone (Runs in Cloud)
Data Privacy 100% On-Device / PrivateSent to Cloud Provider
Rate Limits & AvailabilityZero (Always Available)Subject to Provider Quotas
Context WindowN/AN/A
Detailed PageHardware Details Model Specs

Frequently Asked Questions about FLUX.1 Fill [pro] vs FLUX.2 Klein 9B

FLUX.2 Klein 9B is cheaper, costing $0.0150 per image generation compared to FLUX.1 Fill [pro] at $0.0500 per image.

FLUX.2 Klein 9B is faster, operating in the real-time speed tier compared to FLUX.1 Fill [pro] which is in the fast speed tier.

FLUX.1 Fill [pro] is stronger in: Realism (High vs Medium), Prompt Adherence (High vs Medium-High), Editing (High vs Medium), Output Quality (High vs Medium), Character Consistency (High vs Medium), Text Rendering (High vs Medium-High).