ABrush vs ReLLM: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of ABrush and ReLLM — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
ABrush
ABrush
AI image generation and editing studio that runs as a panel inside Adobe Photoshop, with 23+ models, ControlNet, LoRA styles and layer-native output.
Key features
- Photoshop-native panel: Generation, editing and upscaling happen on the open document and land on real layers, with no export-import round trip
- 23+ models in one panel: Switch between Stable Diffusion, Flux, Qwen Image and others per stage of a piece rather than committing to one provider
- Targeted editing: Inpaint or regenerate only the region that needs changing, keeping the rest of the composition untouched
- Pro conditioning controls: ControlNet support plus IP-Adapter and reference images for pose, composition and style control
- Custom LoRA styles: Load your own LoRA or style models to keep generations consistent with an established look
- Generation history: Every generation is saved and recoverable, so artists can return to an earlier variation without regenerating
- Shareable presets: Save prompts and settings as presets and share them across a team to reproduce a house style
- Commercial-safe data policy: Generated images belong to the user and customer images are not used for model training
Best for
- A concept artist generating multiple variations of a character directly in the working file and painting over the strongest one
- A retoucher fixing a single element of a composite with inpainting rather than regenerating the whole image
- A studio distributing a shared preset pack so several artists produce work in a consistent house style
- A freelance illustrator using a custom LoRA to keep generated assets on-style with a client's brand
- A designer upscaling and cleaning up a low-resolution asset without leaving Photoshop
- An agency handling commercial client work that needs assurance the images aren't used for model training
ReLLM
r2d4
Python library that enforces exact structured outputs from LLM completions by masking logits to match regex patterns.
Key features
- Token-level Pre-filtering: Tests each possible next-token completion against a partial regular expression and prevents tokens that would break the pattern from being generated by masking their logits.
- Partial-Regex Evaluation: Evaluates potential continuations incrementally using partial regular expressions so the generation process can be constrained at every step to enforce complex formats.
- Logit Masking Compatibility: Operates by masking logits rather than post-filtering, enabling deterministic enforcement of structure within standard decoding loops (e.g., greedy, top-k) when the model exposes logits.
- Structured Output Enforcement: Ensures outputs conform to strict formats such as JSON arrays or other schema-like regex patterns, reducing the need for downstream parsing and correction.
- Easy Installation and Examples: Distributed as a Python package (pip install rellm) with repository examples demonstrating common patterns and prompt setups for extracting structured data.
- Hosted API Reference: Notes availability of a hosted Regex Completion API (Thiggle Regex Completion API) for users seeking a managed service rather than self-hosted integration.
- Regex-driven pre-generation filtering that tests completions against a partial pattern per token
- Masks logits for disallowed tokens so the language model cannot generate non-matching outputs
- Designed to produce exact structured outputs (e.g., JSON, constrained formats) from LMs
- Pip-installable Python package (pip install rellm) with repository examples
- References a hosted API option (Thiggle Regex Completion API) for managed usage
Best for
- Reliable JSON Extraction: Force LLM responses to produce valid JSON arrays or objects (e.g., lists of items) so downstream systems can parse them without additional validation.
- Formatted Data Generation: Ensure generated outputs match strict formats like CSV rows, phone numbers, or fixed field templates required by legacy systems or ingestion pipelines.
- Schema-Constrained APIs: Integrate ReLLM into production inference to guarantee responses conform to expected regex-based schemas for webhooks, microservices, or data pipelines.
- Testing and Validation of LLM Behavior: Use regex constraints to probe and validate model behavior (e.g., detect memorized patterns or biased outputs) by restricting generations to specific patterns.
- Safe Prompting for Automation: Prevent hallucinated or malformed outputs in automation workflows (chatbots, document generation) by constraining possible tokens to only those that maintain the format.
- Hybrid Hosted or Self-Hosted Deployment: Use the open-source library in local inference stacks or adopt referenced hosted Regex Completion APIs for managed deployments where self-hosting isn't desired.
- Enforcing JSON or other structured output formats from LLMs for reliable parsing
- Constraining model generation to domain-specific patterns (IDs, phone numbers, codes)
- Validating or sanitizing LM outputs in pipelines that require strict formatting
- Research and testing of model behavior under constrained decoding
- Providing deterministic or format-guaranteed completions for integrations and APIs