Black Forest Labs vs Upstage: Token Pricing, Speed & Intelligence
Full comparison of Black Forest Labs and Upstage — live token pricing, latency, throughput, context window, strengths, weaknesses, and best use cases. Rates sourced from public APIs — verify before use.
Black Forest Labs
FLUX 1.1 Pro Ultra — the quality benchmark for commercial image generation
Black Forest Labs created FLUX, the model family that has become the quality benchmark for both open and commercial image generation. FLUX 1.1 Pro Ultra produces photorealistic images at up to 4MP resolution. The 2026 lineup adds FLUX 1.1 Pro Ultra (highest quality), FLUX 1.1 Pro (production), FLUX.1 Dev (open-weight, fine-tuning), and FLUX.1 Schnell (open-weight, fastest). FLUX models are available via the BFL API and through Replicate, fal.ai, and other inference platforms.
Upstage
Solar Pro 4, Solar Pro 3, Solar Pro 2 — Korean frontier models with strong multilingual performance
Upstage is a Korean AI company offering the Solar model family via API. Solar Pro 4 is the current flagship, with Solar Pro 3 and Solar Pro 2 available at lower price points. The Solar models are known for strong multilingual performance, particularly in Korean and English, and competitive pricing relative to their capability tier. Pricing is published at upstage.ai/pricing.
Key metric comparison
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Live token pricing
Strengths and weaknesses
Black Forest Labs
Upstage
Key differentiators
FLUX 1.1 Pro Ultra produces the highest-quality AI images available — consistently outperforming Stable Diffusion and competing with Midjourney on photorealism — with open-weight Dev/Schnell variants for self-hosting.
Korean-built Solar models with strong multilingual performance and competitive frontier-tier pricing — Solar Pro 4 at $0.30/$1.20 per 1M tokens.
Frequently asked questions
Black Forest Labs FAQs
What is the difference between FLUX 1.1 Pro Ultra and FLUX.1 Dev?
FLUX 1.1 Pro Ultra is a commercial API model offering the highest quality output at up to 4MP resolution. FLUX.1 Dev is an open-weight model available for self-hosting and fine-tuning, with slightly lower quality than Pro Ultra but full weight access.
How does FLUX compare to Stable Diffusion 3.5?
FLUX consistently outperforms SD 3.5 on image quality benchmarks, particularly for photorealism and prompt adherence. FLUX Schnell is also significantly faster than SD 3.5 for equivalent quality.
Where can I access FLUX models?
FLUX models are available via the BFL API directly, and through Replicate, fal.ai, Novita AI, and other inference platforms. FLUX.1 Dev and Schnell weights are also available on Hugging Face for self-hosting.
Upstage FAQs
What is Upstage Solar?
Upstage Solar is a family of LLMs from Korean AI company Upstage. Solar Pro 4 is the current flagship, with Solar Pro 3 and Solar Pro 2 at lower price points. See upstage.ai/pricing for current rates.
How much does Upstage Solar cost?
As of October 2026: Solar Pro 4 $0.30/$1.20 per 1M tokens, Solar Pro 3 $0.15/$0.60, Solar Pro 2 $0.15/$0.60. See upstage.ai/pricing for current rates.
Is Upstage good for Korean language tasks?
Yes. The Solar model family is developed by a Korean AI company and shows strong performance on Korean-language benchmarks, making it a top choice for Korean NLP workloads.
Provider resources
Black Forest Labs — FLUX 1.1 Pro Ultra — the quality benchmark for commercial image generation
Black Forest Labs created FLUX, the model family that has become the quality benchmark for both open and commercial image generation. FLUX 1.1 Pro Ultra produces photorealistic images at up to 4MP resolution. The 2026 lineup adds FLUX 1.1 Pro Ultra (highest quality), FLUX 1.1 Pro (production), FLUX.1 Dev (open-weight, fine-tuning), and FLUX.1 Schnell (open-weight, fastest). FLUX models are available via the BFL API and through Replicate, fal.ai, and other inference platforms.
FLUX 1.1 Pro Ultra produces the highest-quality AI images available — consistently outperforming Stable Diffusion and competing with Midjourney on photorealism — with open-weight Dev/Schnell variants for self-hosting.
Upstage — Solar Pro 4, Solar Pro 3, Solar Pro 2 — Korean frontier models with strong multilingual performance
Upstage is a Korean AI company offering the Solar model family via API. Solar Pro 4 is the current flagship, with Solar Pro 3 and Solar Pro 2 available at lower price points. The Solar models are known for strong multilingual performance, particularly in Korean and English, and competitive pricing relative to their capability tier. Pricing is published at upstage.ai/pricing.
Korean-built Solar models with strong multilingual performance and competitive frontier-tier pricing — Solar Pro 4 at $0.30/$1.20 per 1M tokens.
Key strengths compared
Black Forest Labs
- FLUX 1.1 Pro Ultra: highest-quality commercial image generation available
- FLUX.1 Dev and Schnell: open-weight models for fine-tuning and self-hosting
- FLUX.1 Schnell: fastest open-weight image generation model
- Newer company with smaller ecosystem than Stable Diffusion
- Pro models require API access — no self-hosting for highest quality
Upstage
- Solar Pro 4: competitive frontier-tier pricing at $0.30/$1.20 per 1M tokens
- Strong multilingual performance — Korean and English
- Three-tier model family: Solar Pro 4, 3, and 2 for different cost/quality trade-offs
- Smaller global ecosystem than OpenAI or Anthropic
- Limited model variety beyond the Solar family
Key weaknesses compared
Black Forest Labs
- Newer company with smaller ecosystem than Stable Diffusion
- Pro models require API access — no self-hosting for highest quality
- Less community fine-tuning ecosystem than SD
Upstage
- Smaller global ecosystem than OpenAI or Anthropic
- Limited model variety beyond the Solar family
- Less documentation in English than major US providers
Provider category context
Black Forest Labs is a frontier lab, founded in 2024. Upstage is a frontier lab, founded in 2020. Both are frontier lab providers — the comparison is primarily about pricing, model selection, and feature differentiation within the same tier.
How to choose between them
Both Black Forest Labs and Upstage are frontier labs with proprietary models. Choose based on benchmark performance for your specific task: Black Forest Labs leads on flux 1.1 pro ultra: highest-quality commercial image generation available, while Upstage leads on solar pro 4: competitive frontier-tier pricing at $0.30/$1.20 per 1m tokens. For cost-sensitive workloads, compare the cheapest model tier from each provider in the pricing table above — the gap between efficient-tier models is often larger than between flagship models.