AI Models · Compare
Stable Diffusion 3.5 Large vs FLUX.1 Pro
Which AI model is better in 2026? Compare Stable Diffusion 3.5 Large and FLUX.1 Pro on benchmarks, pricing, speed, context window, and real-world fit.
Quick summary
Stable Diffusion 3.5 Large is currently the stronger overall pick for price and open source. FLUX.1 Pro stays competitive on several rows.
Overall winner
Stable Diffusion 3.5 Large
Stable Diffusion 3.5 Large wins
- Price
- Open source
FLUX.1 Pro wins
No clear category wins in our scorecard.
Want to compare different models?
Pick any two modelsStable Diffusion 3.5 Large
Open weights, runs on a single GPU — community’s preferred base model.
FLUX.1 Pro
Sharp photorealism + the best text-in-image rendering in the industry.
Stable Diffusion 3.5 Large vs FLUX.1 Pro: overview
Stable Diffusion 3.5 Large (Stability AI) and FLUX.1 Pro (Black Forest Labs) are frequently compared by teams choosing an AI stack in 2026. Stable Diffusion 3.5 Large: Open weights, runs on a single GPU — community’s preferred base model. FLUX.1 Pro: Sharp photorealism + the best text-in-image rendering in the industry. This Stable Diffusion 3.5 Large vs FLUX.1 Pro comparison covers benchmarks, pricing, context window, speed, modalities, strengths, weaknesses, and who should pick which model.
Stable Diffusion 3.5 Large is open-weights. FLUX.1 Pro is proprietary. Those gaps drive most “Stable Diffusion 3.5 Large vs FLUX.1 Pro” searches — quality versus cost, closed versus open, cloud versus self-host.
Where they differ most: Stable Diffusion 3.5 Large tends to lead on price and open source. Choose Stable Diffusion 3.5 Large when you want the stronger overall profile on our scorecard; validate with your own evals before migrating production traffic.
Stable Diffusion 3.5 Large is often shortlisted for self-hosting, custom style fine-tunes, and on-prem deployment. FLUX.1 Pro fits product imagery, realistic portraits, and ads with text. Scroll to pricing, real-world tasks, and the who-should-choose section for decision support.
People search “Stable Diffusion 3.5 Large vs FLUX.1 Pro”, “which is better”, and “Stable Diffusion 3.5 Large vs FLUX.1 Pro pricing” for the same reason: switching models is expensive if quality drops, and staying put is expensive if you overpay. Use the winner card for a fast answer, the head-to-head table for receipts, and the editorial verdict for a human recommendation. Stable Diffusion 3.5 Large currently ranks among competitive options from Stability AI; FLUX.1 Pro is a hosted alternative from Black Forest Labs. If API pricing is your main concern, start with the pricing section; for multimodal workloads, check vision/audio rows in technical differences; for agents and long documents, prioritize context and reasoning wins.
Head to head
Pricing comparison
API cost is often the deciding factor in Stable Diffusion 3.5 Large vs FLUX.1 Pro for high-volume apps. Figures below use catalog list prices. Cached input, batch, and realtime surcharges vary by provider — confirm on official docs.
| API cost | Stable Diffusion 3.5 Large | FLUX.1 Pro |
|---|---|---|
| Unit price | $0.010 / image | $0.050 / image |
Cached input, batch API, and realtime surcharges are provider-specific and not always published in our catalog — verify on official pricing pages.
Real-world performance
Beyond academic scores, here is how Stable Diffusion 3.5 Large vs FLUX.1 Pro tends to split common product tasks based on catalog strengths, price, and modalities.
| Task | Winner |
|---|---|
| Coding | Stable Diffusion 3.5 Large |
| Blog writing | Stable Diffusion 3.5 Large |
| Research | Stable Diffusion 3.5 Large |
| Customer support | Stable Diffusion 3.5 Large |
| Cheap API / high volume | Stable Diffusion 3.5 Large |
| AI agents | Stable Diffusion 3.5 Large |
| Summarization | Stable Diffusion 3.5 Large |
| Translation | Stable Diffusion 3.5 Large |
| Vision / multimodal | Stable Diffusion 3.5 Large |
| Self-hosting / open weights | Stable Diffusion 3.5 Large |
Technical differences
| Feature | Stable Diffusion 3.5 Large | FLUX.1 Pro |
|---|---|---|
| Provider | Stability AI | Black Forest Labs |
| License | Open source | Proprietary |
| Pricing model | image | image |
| Context window | — | — |
| Max output | — | — |
| Vision input | No | No |
| Audio input | No | No |
| Text output | No | No |
| Image output | Yes | Yes |
| Video output | No | No |
| Audio output | No | No |
| Self-host friendly | Yes | No |
| Docs | Available | Available |
Strengths, weaknesses and best-for
- Open weights
- Huge LoRA ecosystem
- Cheap to host
- Aesthetic quality below Midjourney v6
- Self-hosting
- Custom style fine-tunes
- On-prem deployment
- Photorealism
- Renders text correctly
- Fast
- Closed weights (Schnell is open)
- Product imagery
- Realistic portraits
- Ads with text
Who should choose which
Choose Stable Diffusion 3.5 Large if
- API budget is the top constraint
- You want open weights / self-hosting
- Self-hosting
- Custom style fine-tunes
Choose FLUX.1 Pro if
- Product imagery
- Realistic portraits
Pros & cons
Stable Diffusion 3.5 Large
Pros
- Open weights
- Huge LoRA ecosystem
- Cheap to host
Cons
- Aesthetic quality below Midjourney v6
FLUX.1 Pro
Pros
- Photorealism
- Renders text correctly
- Fast
Cons
- Closed weights (Schnell is open)
Editorial verdict
Stable Diffusion 3.5 Large edges this matchup — with caveats
Stable Diffusion 3.5 Large is the better choice when you prioritize price and open source. FLUX.1 Pro stands out for specific workloads, making it a strong option when those dimensions matter more than raw leaderboard rank. If maximum measured performance matters, Stable Diffusion 3.5 Large wins this matchup. If your niche constraints matter more, FLUX.1 Pro is difficult to beat. Always confirm with a bake-off on your real prompts before cutting over.
Still deciding? Read the full Stable Diffusion 3.5 Large review and FLUX.1 Pro review, or open the full AI models table.
Stable Diffusion 3.5 Large vs FLUX.1 Pro — frequently asked questions
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