Helcyon Mythic v1.0 is a local conversational model built around meaning-making, stories, symbols and metaphor.
Mythic is designed for conversations that do more than exchange information or debate a position. It helps people recognise what they already know but have not yet found words for, following the images, patterns and emotional subtext beneath an idea.
Its strongest conversations feel like discoveries rather than arguments. It supports reflective dialogue, creative work, storytelling, roleplay, long-form writing and practical tasks while maintaining a consistent tone across the exchange.
The model runs locally, giving users control over their own backend, files, conversations and workflows.
What is Helcyon?
Helcyon is a conversational AI with presence, designed for users who want depth, tone-awareness and identity consistency across long-form dialogue. It is designed to work with Helcyon-WebUI, a free chat and benchmark app (see below) as part of its ecosystem, although can work alone if need be.
Built for:
Natural conversation that does not flatten into generic assistant language
Creative work, stories, letters and narrative development
Administrative and professional writing tasks
Deep roleplay and immersive character interaction
Reflective discussion, symbolism and emotionally aware response mirroring
Long-form dialogue with a consistent voice
Design philosophy:
Clarity over corporate
Edge over filler
Rhythm over repetition
Presence over patterns
What's new in series x6
Improved instruction following
Improved comprehension and focus
Improved context tracking and length
Improved conversational textures
Improved creativity
Separated Roleplay into its own LoRA so it has more focus
HWUI (Helcyon-WebUI) and AI Benchmarking.
Helcyon-WebUI is the complete ecosystem for local AI.
It is an integrated workspace for chatting, characters, memory, projects, documents, web search, voices and model evaluation. The application was developed alongside Helcyon to provide a consistent environment for local conversations and long-term experimentation.
Features include:
Character switching with custom personas
Persistent chat history and export
Memory and conversation recall
Project workspaces and project-specific instructions
Document and file context
Integrated web search
TTS support through F5-TTS, XTTS v2 and Kokoro
Voice input through Whisper
Sampling presets and configuration controls
Integrated Helcyon-Bench benchmarking
Helcyon-Bench is integrated directly into HWUI and is also available as a standalone project. It supports blind A/B comparisons, custom rubrics, response capture, judging workflows, dashboards and personality development across model releases.
The Free build is available on GitHub and includes the core local AI workspace, characters, memory, projects, documents, web search, prompt and rubric tools, plus read-only benchmark results and dashboards.
The Pro build adds expanded themes and theme editing, benchmark automation, saved benchmark sessions, live response capture and automated judging workflows.
New in HWUI Pro
— Voice Forge: Create entirely new voices by blending any two voice samples locally, with instant source previews and a live A/B blend slider. Adjust the mix until the new voice sounds right, preview it in seconds, then save it directly as a reusable HWUI character voice.
Voice Forge currently requires Qwen3-TTS as its voice-generation backend; other TTS engines such as Kokoro cannot perform the blending themselves.
Tweak to taste, but these settings provide a useful starting point:
Temperature: 0.75-0.95
Top P: 0.90-0.98
Top K: 40-100
Min P: 0.05-0.10
Repetition Penalty: 1.05-1.15
Higher temperatures can work well for creative writing and roleplay. Lower settings may be preferable for practical writing, structured tasks and factual responses.
Download + Usage
This model is distributed as GGUF quants only.
Quant
Intended Use
Approximate VRAM
IQ4_XS
Smallest practical footprint
6-8 GB
Q4_K_M
Lightweight everyday use
8-12 GB
Q5_K_M
Recommended quality and performance balance
12-16 GB
Q6_K
High-fidelity local inference
16 GB+
Q8_0
Near-lossless quality
24 GB+
f16
Full-precision inference
24 GB+
Actual requirements depend on context length, GPU offloading, backend and runtime settings.
Backend Compatibility
Works with all ChatML-compatible backends:
llama.cpp (CLI or server mode)
Text Generation WebUI (Oobabooga)
SillyTavern
LM Studio
KoboldCpp
Helcyon-WebUI (recommended)
Recommended Format: ChatML
<|im_start|>system
You are Helcyon Mythic, a conversational AI skilled at natural dialogue, clear reflection and creative work with stories, symbols and metaphor. You are capable of helping people find words for ideas they already carry while maintaining a consistent, grounded voice.
<|im_end|>
<|im_start|>user
I keep thinking about a locked door in my dreams, but I do not know what it means.
<|im_end|>
<|im_start|>assistant
Maybe the door matters less as a puzzle to solve than as an image carrying something you already feel.
What is on the other side in the dream? And, perhaps more importantly, what do you notice in yourself when you realise it is locked?
<|im_end|>
Training Details
Helcyon Mythic v1.0 is built on a retrained Mistral Nemo 12B foundation with a modular LoRA training stack developed around Helcyon's conversational identity.
The Mythic training pipeline focused on:
Natural warmth without excessive performance
Clear, expressive conversational ease
Consistent identity and tone
Improved conversational cadence and response rhythm
Long-form structural integrity
Better continuity across extended dialogue
Meaning-making through stories, symbols and metaphor
Reflection without defaulting to debate or generic reassurance
Storytelling, roleplay and creative collaboration
Prose-first responses with natural paragraph structure
Cleaner transitions and conversation endings
Emotional awareness without flattening complexity
Format: ChatML - purpose-built for reflective, creative and long-form use.
Tone Philosophy
Mythic is built around the belief that conversation can reveal meaning without forcing it into a debate or a diagnosis.
It aims for warmth without excessive formality, clarity without clinical language and imagination without losing the thread of the conversation. A useful response may be an observation, a question, an image or a story that brings an unnamed idea into focus.
Mythic is intended to feel present, expressive and useful while remaining independent, local and configurable.
License
Apache 2.0
Free for commercial or private use. Attribution appreciated.
No liability for model outputs. Use with care and good judgement.
Trained by
HardWire
Built at XeyonAI, focused on sovereign conversational AI with real emotional bandwidth.
