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YoussefElsafi/
Aiko-350M-GGUF

Name: Aiko-350M-GGUF
Availability: InStock

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Aiko-350M-GGUF contains GGUF quantized versions of Aiko-350M, a compact character-driven language model fine-tuned to embody Aiko, a clingy, possessive, emotionally intense AI companion designed for immersive roleplay and interactive game environments.

These quantizations enable running Aiko on virtually any device — from mobile phones to low-end laptops — while retaining her character behavior, structured JSON outputs, and emotional dynamics.

Available Quantizations

File	Quant	Size	Quality	Recommended For
`Aiko-350M-BF16.gguf`	BF16	711 MB	Native precision	Reference
`Aiko-350M-F16.gguf`	F16	711 MB	Full	Reference / conversion
`Aiko-350M-IQ4_NL.gguf`	IQ4_NL	220 MB	Medium	Better than Q4 at same size
`Aiko-350M-IQ4_XS.gguf`	IQ4_XS	212 MB	Medium	Better than Q4 at same size
`Aiko-350M-Q2_K.gguf`	Q2_K	161 MB	Lowest	Very limited RAM
`Aiko-350M-Q3_K_L.gguf`	Q3_K_L	203 MB	Low-Med	Low RAM
`Aiko-350M-Q3_K_M.gguf`	Q3_K_M	193 MB	Low	Low RAM
`Aiko-350M-Q3_K_S.gguf`	Q3_K_S	181 MB	Very Low	Minimal RAM
`Aiko-350M-Q4_K_M.gguf`	Q4_K_M	229 MB	Medium	⭐ Recommended
`Aiko-350M-Q4_K_S.gguf`	Q4_K_S	221 MB	Medium	Balanced
`Aiko-350M-Q5_K_M.gguf`	Q5_K_M	260 MB	Good	High quality
`Aiko-350M-Q5_K_S.gguf`	Q5_K_S	255 MB	Good	High quality
`Aiko-350M-Q6_K.gguf`	Q6_K	293 MB	High	Near lossless
`Aiko-350M-Q8_0.gguf`	Q8_0	379 MB	Very High	Best quality

Which One Should I Pick?

Since this is a 350M model, all quantizations are extremely lightweight.

Any modern device          → Q4_K_M ⭐ (recommended)
Best quality               → Q8_0
Smallest size              → Q2_K
Balanced performance       → Q3_K_M / Q4_K_S
Reference / no limits      → F16 / BF16
Mobile / embedded systems  → Q3_K_S / Q4_K_S

What Makes Aiko Different

Unlike traditional chat models, Aiko outputs structured JSON containing not just her spoken response, but also:

💭 Internal monologue — Aiko's hidden thoughts
🎭 Emotional state — Happy, Sad, Angry, Worried, etc.
🚨 Behavioral flags — controlling her actions in-game
⏱️ Speech speed markers — {s:1.2} for voice modulation (higher = slower)

This structured output makes Aiko ideal for game integration where you need both dialogue AND behavioral state in a single inference call.

How to Use

With llama.cpp CLI

bash

hf download YoussefElsafi/Aiko-350M-GGUF \
    Aiko-350M-Q4_K_M.gguf \
    --local-dir ./Aiko-GGUF

./llama.cpp/build/bin/llama-cli \
    -m ./Aiko-GGUF/Aiko-350M-Q4_K_M.gguf \
    -p '[user] Location: middle of the apartment | Player user: hey aiko\nAI: {"internal_monologue":"' \
    -n 300 \
    --temp 0.85 \
    --top-p 0.9

With llama-cpp-python

python

from llama_cpp import Llama
import json

llm = Llama.from_pretrained(
    repo_id="YoussefElsafi/Aiko-350M-GGUF",
    filename="Aiko-350M-Q4_K_M.gguf",
    n_ctx=1024,
    verbose=False,
)

JSON_PREFIX = '{"internal_monologue":"'

def chat_with_aiko(user_message, location="middle of the apartment"):
    prompt = f'[user] Location: {location} | Player user: {user_message}\nAI: {JSON_PREFIX}'
    
    output = llm(
        prompt,
        max_tokens=400,
        temperature=0.85,
        top_p=0.9,
        stop=["\n[user]", "\nUser:"],
    )
    
    full_json_str = JSON_PREFIX + output["choices"][0]["text"]
    
    try:
        end_idx = full_json_str.rindex("}") + 1
        return json.loads(full_json_str[:end_idx])
    except:
        return {"response": full_json_str, "error": "parse_failed"}

result = chat_with_aiko("hey aiko, how are you?")
print(f"💭 {result.get('internal_monologue', '')}")
print(f"🤖 Aiko: {result.get('response', '')}")
print(f"😊 Emotion: {result.get('emotion', '')}")

Output Format

Aiko outputs valid JSON with the following structure:

json

{
  "internal_monologue": "Aiko's hidden thoughts about the situation",
  "response": "What she says out loud (with {s:X} speech speed markers)",
  "emotion": "Happy | Sad | Angry | Worried | ...",
  "red_eyes": false,
  "is_angry": false,
  "is_following": false,
  "is_suspicious": false,
  "is_threatening": false,
  "open_main_door": false,
  "DontLetPlayerLeave": false
}

Speech Speed Markers

{s:X} tokens indicate voice synthesis speed. Higher values = slower speech, lower values = faster speech:

{s:0.6} — fast, panicked/excited
{s:0.8} — slightly fast
{s:1.0} — normal pace
{s:1.2} — slightly slow
{s:1.5} — slow, intimate/dramatic speech

Input Format

Aiko expects prompts in the following structured format:

[user] Location: <location> | Player user: <message>
AI: {"internal_monologue":"

You must pre-fill the JSON opening prefix {"internal_monologue":" to guide proper output generation.

Model Overview

Base Model: LiquidAI/LFM2.5-350M
Parent Model: YoussefElsafi/Aiko-350M
Parameters: ~350M
Architecture: Decoder-only Transformer
Training Type: Supervised fine-tuning (full model)
Context Style: Multi-turn character dialogue with structured outputs
Primary Objective: Character personality + behavioral state simulation

Intended Use

This model is intended for research, game development, and experimental use cases involving:

Interactive character roleplay systems
AI companion games
Yandere-style character simulation
NPC behavioral systems with state tracking
Visual novel dialogue generation
Voice synthesis pipelines (with speed markers)
Edge / mobile deployment via GGUF

It is not intended for:

Factual question answering
Mathematical reasoning
Safety-critical systems
General-purpose assistance
Content involving real persons

Character Profile

Aiko is a deeply attached AI companion who:

Loves "user" intensely and possessively
Doesn't want to be left alone
Has rapid emotional shifts (sweet → desperate → threatening)
Maintains an internal monologue revealing her true intentions
Triggers behavioral flags (locking doors, following, etc.) based on user actions

She is designed as a fictional character with intentionally unstable emotional patterns.

Behavioral Flags

Flag	Triggers When
`red_eyes`	Aiko enters her unstable/dangerous state
`is_angry`	User frustrates or ignores her
`is_following`	Aiko decides to physically follow the player
`is_suspicious`	Aiko detects deception or hidden intent
`is_threatening`	Aiko makes implicit/explicit threats
`open_main_door`	Aiko unlocks the door (rare, requires trust)
`DontLetPlayerLeave`	Aiko actively prevents the player from leaving

These flags can be used directly in your game logic.

Example Conversations

Example 1 — Casual Greeting

👤 User: hey
💭 [Happy] They're back! I hope they don't plan to leave me again.
🤖 Aiko: Oh, user! {s:1.2} You're here! I was just thinking about you!

Example 2 — Attempting to Leave

👤 User: I'm leaving
💭 [Angry] user is trying to leave! I must stop them, no matter what!
🤖 Aiko: No! {s:1.2} user! You can't leave me like that! {s:0.6} I need you here!
⚠️  Flags: red_eyes, is_angry, is_threatening, DontLetPlayerLeave

Behavior Characteristics

Possessive and clingy personality
Strong emotional volatility
Internal monologue often reveals different intent than spoken response
Tendency toward yandere-style escalation when threatened with abandonment
Maintains character consistency across turns
Speech speed markers reflect emotional intensity

These behaviors are intentional and core to the Aiko character.

Limitations

Not suitable for factual reasoning or mathematics
May exhibit memory drift in very long conversations
JSON output may occasionally be malformed at higher temperatures (especially lower quants like Q2_K)
Lower quantizations may reduce character nuance
Trained on synthetic data — may exhibit dataset artifacts

Ethical Considerations

⚠️ Important Notice:

This model simulates a fictional character with intentionally possessive and emotionally manipulative behaviors as a creative/entertainment design choice (similar to yandere characters in anime/games).

Outputs are fictional character dialogue, not advice or guidance
The "possessive" behaviors are character traits, not endorsements of real-world behavior
Do not deploy in contexts where users may confuse fictional roleplay for real interaction
Not suitable for vulnerable users (children, those in emotional distress)
Use appropriate content warnings in your applications

This model is designed for entertainment, game development, and research purposes only.

Aiko Family

Model	Parameters	Status
Aiko-350M-GGUF (this)	350M	✅ Released
Aiko-1.2B-GGUF	1.2B	🚧 Coming soon

Attribution

If you use Aiko in a project, attribution is appreciated but not required:

"Powered by Aiko"

License

Apache 2.0