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FLUX vs Stable Diffusion

A feature-by-feature comparison of FLUX and Stable Diffusion across 7 capability categories.

First tool

Try FLUX (opens in a new tab)

Second tool

Try Stable Diffusion (opens in a new tab)

Modalities — Tie

Modalities: FLUX compared with Stable Diffusion
Feature	FLUX	Stable Diffusion
Text Input	Yes, requires free plan. Text prompts drive FLUX text-to-image on the BFL API and open-weight inference.	Yes, requires free plan. Text prompts drive SD 3.5 and the Stable Image generate APIs.
Image Upload / Vision	Yes, requires plus plan. FLUX.1 Kontext and Fill/Expand endpoints take images for editing. Hosted API is pay-as-you-go.	Yes, requires plus plan. Edit, Control, inpainting, and image-to-image APIs take uploaded images.
Image Generation	Yes, requires free plan. Core product: FLUX.1 [schnell]/[dev] locally, plus FLUX.2 Pro/Max/Flex/Klein via API.	Yes, requires free plan. Core product: SD 3.5 Large/Turbo/Medium locally, plus hosted Brand Studio and API.
Voice Mode	No. Not a conversational voice product. Docs mention synchronized audio on some FLUX 3 video paths; that is generated soundtrack, not a voice loop.	No. Not a conversational voice product.
Video Understanding	No. FLUX 3 docs talk about generating video, not Q&A over uploaded video.	No. This listing is the image family, not a video Q&A product.
Video Generation	No. Not a video generation product.	No. Not a video generation product.
File Upload (PDF, DOCX)	No. Inputs are prompts and images, not PDF/DOCX.	No. Inputs are prompts and images, not PDF/DOCX.
Code Execution	No. You run inference code; the model does not execute your Python.	No. You run inference; the model does not execute your Python.
Audio Input	No. No audio-file input is documented for image endpoints.	No. No audio-file input is documented for Stable Image.
Canvas / Artifact Editor	Partial. Kontext/Fill/Expand are image editors via API, not a chat canvas.	Partial. Brand Studio is an edit workspace (inpaint, sketch-to-image). Not a chat canvas.
Screen Sharing / Computer Use	No. No computer-use product.	No. No computer-use product.

Memory & Context — Tie

Memory & Context: FLUX compared with Stable Diffusion
Feature	FLUX	Stable Diffusion
Persistent Memory	No. Each generation is a job. No user memory layer.	No. Each generation is a job. Brand ID models are weights, not chat memory.
Large Context Window	No. Not an LLM context-window product.	No. Not an LLM context-window product.
Custom Instructions	No. No global instruction profile. Fine-tunes/LoRAs are weights, not a system prompt.	Partial. Brand Studio Campaigns and Brand ID models steer style. That is not a global chat system prompt.
Conversation History	No. Dashboard jobs are not a chat history product.	No. Not a chat-history product.

Integrations — Tie

Integrations: FLUX compared with Stable Diffusion
Feature	FLUX	Stable Diffusion
Web Search / Browsing	No. Does not browse the live web.	No. Does not browse the live web.
Plugins / Extensions	Partial. Community hosts FLUX on Replicate/Hugging Face. That is not a BFL plugin marketplace.	Partial. ComfyUI, Replicate, Fireworks, and DeepInfra are documented hosts. That is not a Stability plugin store.
API Access	Yes, requires plus plan. Official async API at api.bfl.ai (plus eu/us regional). Auth is an x-key. Pay-as-you-go, no seat fee.	Yes, requires plus plan. Stable Image REST APIs (generate, upscale, edit, control) on platform.stability.ai. Trial credits, then paid.
Zapier Integration	Unknown. No first-party Zapier app was checked.	Unknown. No first-party Zapier app was checked.
Custom GPTs / Bots	No. No Custom GPT store. Fine-tunes are weights.	No. No Custom GPT store. Fine-tunes are weights.
Real-time Collaboration	No. No multiplayer editor.	No. No multiplayer editor is documented.
Live Social Data Integration	No. No live social firehose.	No. No live social firehose.
Live Citation Mapping	No. Not a cited-search product.	No. Not a cited-search product.

Developer — Tie

Developer: FLUX compared with Stable Diffusion
Feature	FLUX	Stable Diffusion
Function Calling	No. You POST a generation job and poll. No tool-calling chat.	No. You POST an image job. No tool-calling chat.
Streaming Responses	No. Async poll for the finished image, not token streaming.	No. REST v2beta supports polling for async jobs, not token streaming.
Fine-Tuning	Yes, requires plus plan. Open-weight [dev]/[klein] plus paid self-host licenses list fine-tuning and LoRA rights. API OpenAPI also lists fine-tune management.	Yes, requires free plan. SD 3.5 is marketed as customizable (fine-tunes/LoRA). Brand Studio adds Brand ID models on Enterprise.
Embeddings API	No. Not an embeddings API.	No. Not an embeddings API.
Structured Output (JSON)	No. Output is an image (jpeg/png/webp), not JSON schema.	No. Output is an image, not JSON schema.
Reasoning / Thinking Mode	No. Not an LLM reasoning mode.	No. Not an LLM reasoning mode.
Local Execution	Yes, requires free plan. Official GitHub inference repo runs open-weight FLUX.1 [schnell] and [dev] on your hardware.	Yes, requires free plan. Weights and inference code are on Hugging Face/GitHub. SD 3.5 Medium is documented at ~9.9 GB VRAM.
Open Weights	Yes, requires free plan. FLUX.1 [schnell] is Apache-2.0; [dev] is a non-commercial license. Hosted Pro/Max stay closed.	Yes, requires free plan. SD 3.5 Large/Turbo/Medium are an open release under the Stability AI Community License.
Multi-Agent Orchestration	No. Not a multi-agent orchestrator.	No. Not a multi-agent orchestrator.

Platforms — Tie

Platforms: FLUX compared with Stable Diffusion
Feature	FLUX	Stable Diffusion
Web App	Yes, requires free plan. Docs point at a playground plus the dashboard at dashboard.bfl.ai.	Yes, requires free plan. Brand Studio and Stable Assistant are documented web apps. First 1000 Brand Studio credits are a trial.
iOS App	No. No official iOS app is documented.	No. No official iOS app is documented on the product pages checked.
Android App	No. No official Android app is documented.	No. No official Android app is documented on the product pages checked.
Desktop App	No. Self-host is your own stack, not a BFL desktop app.	No. Self-host is your own stack (ComfyUI etc.), not a Stability desktop app.
Chrome Extension	No. No official Chrome extension.	No. No official Chrome extension.

Privacy — Tie

Privacy: FLUX compared with Stable Diffusion
Feature	FLUX	Stable Diffusion
GDPR Compliant	Partial. api.eu.bfl.ai is documented as the EU/GDPR regional endpoint. That is data routing, not a published DPA we read here.	Unknown. Needs a current Stability DPA read.
Opt Out of Data Training	Unknown. Training use of API prompts was not checked on a privacy policy this round.	Unknown. Training use of API prompts was not checked on a privacy policy this round.
Enterprise Privacy Mode	Yes, requires enterprise plan. Pricing lists Enterprise self-host licensing plus custom volume/SLA. EU and US regional APIs exist.	Yes, requires enterprise plan. Enterprise API plans list on-prem/self-host, SLAs, and verified-customer safety. Brand Studio Enterprise adds SSO.

Workspaces — Tie

Workspaces: FLUX compared with Stable Diffusion
Feature	FLUX	Stable Diffusion
Projects / Folders	No. No notebook/project product. Dashboard jobs only.	Partial. Brand Studio Enterprise lists project access controls. Not a notebook product.