Reflection Beam vs Stable Diffusion comparison

Reflection Beam and Stable Diffusion compared side by side in AI.

Reflection Beam

A 501B open-weight model that US-based Reflection AI released in October 2026. It drew attention as a US-made alternative to Chinese open models, with low inference compute as its strength

What is good

A large US-made open-weight model (Apache 2.0)
Strong coding benchmarks (SWE-bench Verified 80.9, official announcement)
GLM-5.2-class reasoning with 3 to 4 times less compute (official announcement)

What could be better

API price and free limits not disclosed
Text only (no image support, etc.)

Reflection Beam official site

Stable Diffusion

A leading open-source image generation model you can install and run on your own computer

What is good

Free and open source
Install it yourself for unlimited generation
Very many community models

What could be better

Hard to install and use
Needs a good graphics card

Stable Diffusion official site

At a glance

Highlighted rows are where they differ.

Item	Reflection BeamVisit site	Stable DiffusionVisit site
Starting price	FreeNot applicable	FreeNot applicable
Free tier	Free	Free
Korean support	Limited	Average
Main models	Beam (501B total, 23B active MoE, text only)	Stable Diffusion 3.5(Large/Medium/Turbo) Stable Image Ultra/Core(API) SDXL Stable Audio 3.0
Type	AI services	AI services
Category	Open Models	Image Generation, Open Models
Company	Reflection AI, United States	Stability AI, United Kingdom
Plans	Weights released free (Apache 2.0, 2026-10-16, Hugging Face BF16 FP8 NVFP4) Reflection API public beta (starts free, limits not disclosed) Also offered on partner platforms API price not disclosed	Local use free (revenue under $1M) API $0.03 to $0.08 per image Brand Studio $50 Enterprise
Pros	A large US-made open-weight model (Apache 2.0) Strong coding benchmarks (SWE-bench Verified 80.9, official announcement) GLM-5.2-class reasoning with 3 to 4 times less compute (official announcement) Fine-tuning and evaluation tools to be released as well	Free and open source Install it yourself for unlimited generation Very many community models
Cons	API price and free limits not disclosed Text only (no image support, etc.) No chat app for general users Lower than Kimi K3 and DeepSeek V4.1 Flash on some benchmarks No public Korean performance data	Hard to install and use Needs a good graphics card

Prices and benefits may change. Check the official site before you pay.

Prices converted at 1 USD = ₩1,325.57 (2026-10-21). Original price shown in brackets. Taxes as listed by each provider.

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