whereismyai
BYOSM
BYOSM is an open-source tool that builds small specialist models from a single sentence description to run locally.
BYOSM stands for Build Your Own Specialist Model. It is an open-source tool that takes a single sentence describing a task and creates a small, locally-runnable specialist model. Users provide a task description and an LLM, and the system builds the model while tracking progress and logs live. It generates health scores, compares performance against rivals using the same code, and tests models on new inputs. Users can deploy the output as an ONNX bundle via Python, HTTP, the command line, or a Docker image. State is stored in a SQLite database by default, with Postgres supported via an environment variable.
BYOSM at a glance
- Best for: Software engineer
- Runs on: CLI, self-hosted, open source
- Pricing: Free
- Released: October 2026
- Category: AI coding tool
- Website: github.com/bsye/byosm
Key features
- Describe tasks with a single sentence
- Watch model building progress live
- Check model health and suggested fixes
- Compare performance with rivals
- Test models on new inputs
- Deploy as an ONNX bundle
- Store state in SQLite or Postgres
Use it for
- Build small specialist models from text descriptions
- Compare custom models against LLMs and rivals
- Test models on custom and Hugging Face datasets
- Deploy specialist models via Python, HTTP, or Docker
Alternatives to BYOSM
- whichllm — Ranks models using real benchmarks and hardware fit instead of parameter count.
- OpenCode — Works with 75+ model providers, local models, and existing subscriptions
- Freebuff — Access multiple coding AI models for free without subscriptions.
- OpenMonoAgent — Runs locally on your own hardware with no recurring subscription fees.
- SmallCode — Runs fully local with budget-managed context and a forgiving parser for small models.
- SOMA — Design 3D models instantly using natural language and AI coding agents.
- Little Coder — Optimized for small local models with built-in planning and research tools.
- ProductOS — Shared context across every stage from a single prompt.
- Free Coding Models — It pings 271 models in parallel to show live latency, stability scores, and verdicts.
- Repomix — Packages entire codebases into single files for AI context.
- opencode.nvim — Keeps AI interactions within the existing Neovim environment and workflow.
- Command Code — Repairs open model tool calls and learns developer patterns automatically.
All BYOSM alternatives