Install Mythos
# Install from PyPI
pip install mythos-sentinel
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From the void of computation, a new oracle speaks -- no gods, no cloud, only the terminal.
Open-Mythos-2 runs GGUF models on your hardware via llama-cpp-python. Metal on macOS, Vulkan on Linux AMD, CUDA on NVIDIA. No data leaves your machine.
Cloud AI services trade your privacy for convenience. Mythos gives you both.
| Feature | Mythos | Cloud AI |
|---|---|---|
| Data privacy | 100% local -- nothing leaves your machine | Data sent to remote servers |
| API keys required | None | Required, metered |
| Offline use | Fully offline | Requires internet |
| Cost | Free forever | Per-token billing |
| Security scanning | Built-in SAST + AI audit | Not included |
| Self-improvement | RML feedback engine | Static behavior |
| License | Apache 2.0 | Proprietary |
Everything you need for local AI, in one package.
Rich terminal UI with syntax highlighting, streaming responses, slash commands, and full conversation management. Your AI lives in the terminal where you do.
Built-in commands for everything: /config, /export, /summary, /voice, /rag, /fix, /rml, /persona, and more. Full control without leaving the chat.
Reinforcement Meta-Learning: Mythos learns from your feedback. Explicit signals (/rml good/bad) and implicit cues adjust temperature, top_p, and system prompts over time.
Static SAST scanner for quick findings, AI-powered deep scanner for nuanced audits. Auto-fix with --apply or inline /fix in chat. No external tools needed.
ChromaDB + sentence-transformers. Index local documents, query them in chat. Perfect for codebases, docs, or research papers -- all local, all offline.
Whisper-based speech-to-text input. espeak-ng or Piper text-to-speech output. Press V to talk, let Mythos talk back. Hands-free local AI.
Not a terminal person? Launch the web interface with --mode web. Same engine, same model, browser-based interaction on port 7860.
Train custom LoRA adapters on your own data. Merge into the base model, convert to GGUF, and run your fine-tuned model locally. Full pipeline included.
Key facts persist across sessions. Session summaries give structured digests. Your AI remembers context without sending anything anywhere.
The only local AI that improves the more you use it.
Use /rml good or /rml bad to explicitly rate responses. Mythos also picks up implicit signals: edits, interruptions, and keyword cues.
Feedback is categorized (reasoning, creativity, instruction-following, etc.) and scored. When a category crosses the negative threshold, an adjustment triggers.
Temperature, top_p, and other sampling parameters are automatically adjusted. A learned hint is injected into the system prompt to steer future responses.
RML state is saved to ~/.config/mythos/rml_preferences.json. Your AI gets better across sessions, not just within one conversation.
Built-in SAST and AI-powered security auditing. No external tools.
Regex-based SAST
No model needed
AI-powered audit
Context-aware
Dry-run or apply
MYTHOS_PATCH rewrite
Re-scan after fix
Confirm resolution
Up and running in three commands.
# Install from PyPI
pip install mythos-sentinel
# Downloads Mythos 4.8 (Gemma 3 12B fine-tune, Q4_K_M)
mythos model download
mythos
git clone https://github.com/creatorofsomethingthatisgood/Open-Mythos-2.git
cd Open-Mythos-2
python main.py --mode chat
The mythos CLI at a glance.
| Command | Description |
|---|---|
| mythos | Launch terminal chat (default mode) |
| mythos cloud | Cloud API mode (OpenAI-compatible) |
| mythos scan <path> | Static security scan |
| mythos scan <path> --deep | AI-powered deep security audit |
| mythos fix --path <path> | Dry-run auto-fix for findings |
| mythos fix --path <path> --apply | Apply auto-fixes to disk |
| mythos model download | Download default GGUF model |
| mythos doctor | Diagnose setup issues |
| mythos config | View or edit configuration |
| mythos history | List past conversation sessions |
Public domain. No restrictions. Build anything.
Mythos is released under the Apache License 2.0.
Use it, fork it, sell it, embed it -- permissive and powerful.