flux-1.1-pro-ultra

flux-1.1-pro-ultra is a frontier-tier language model from Black Forest Labs. flux-1.1-pro-ultra is a proprietary model available exclusively through Black Forest Labs's API. The FLUX family is Black Forest Labs's model series for this capability tier.

flux-1.1-pro-ultra is priced at $0.06 per image. This is a image model billed per image rather than per token — token input/output pricing does not apply.

Its 4K-token context window is standard for this tier — adequate for most chat and completion tasks, but may require chunking for long-document workloads. Median latency (P50 time-to-first-token) is approximately 7000ms — better suited to batch or async workloads where latency is less critical.

flux-1.1-pro-ultra is best suited to image-generation, quality, high-resolution. It is a text-only model without vision or function calling support. When evaluating this model for a specific workload, the most important factors are: context window (does your input fit?), output price (how long are your generations?), and latency (is this interactive or batch?). The pricing table above shows how flux-1.1-pro-ultra compares to similar models across these dimensions.

flux-1.1-pro-ultra sits in the frontier tier — the highest-capability models available, used when quality is the primary constraint and cost is secondary. Unlike open-weights alternatives, flux-1.1-pro-ultra is only available via Black Forest Labs's API — there is no self-hosted option, which simplifies deployment but creates vendor dependency. When comparing flux-1.1-pro-ultra to alternatives, use the similar models section on this page to find models at comparable price points with different capability tradeoffs. The intelligence score (0/100) reflects aggregate benchmark performance — a useful proxy for general capability, though real-world performance varies significantly by task type. Always test with your specific prompts and use case before committing to a model for production.