MythoMax 13B
VerifiedOpen-weight LLM for creative text and conversation tasks.
About MythoMax 13B
MythoMax 13B was released as an open-weight LLM by Gryphe. It processes text-only inputs within a 4096-token context limit. The design emphasizes accessibility for users running models locally or on modest hardware.
Its open-weight status allows researchers and developers to inspect weights and perform custom fine-tuning. This flexibility supports experimentation across multiple text-generation scenarios without licensing barriers.
Common applications include story writing, role-play dialogues, and general chat interfaces. Users deploy it where an unrestricted 13B-scale text model is needed for iterative creative work.
Capabilities
How MythoMax 13B compares
MythoMax 13B (striped bar) vs other language models on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · MythoMax 13B ranks #5 of 144
Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Best for
Role-Playing Adventures
MythoMax 13B excels at sustaining character-consistent dialogue and narrative progression during extended interactive role-play sessions.
Fantasy World Building
It generates coherent, detailed descriptions that align with user-defined rules to construct immersive fictional settings and lore.
Guided Story Continuation
The model follows precise instructions to produce engaging creative writing and conversational responses that maintain story continuity.
Strengths & limitations
Strengths
- +Strong narrative flow in fiction
- +Expressive and detailed prose
- +Good character voice retention
- +Responsive to creative prompts
Limitations
- –Limited 4k context window
- –Weaker on complex factual reasoning
- –Typical LLM hallucination risks
Cost calculator
Estimate what MythoMax 13B would cost for your usage.
Based on MythoMax 13B's $0.06/1M input · $0.06/1M output. Estimate only — actual cost varies by provider and caching.
Quick start
OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. Only the model slug changes between models.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const completion = await client.chat.completions.create({
model: "gryphe/mythomax-l2-13b",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: gryphe/mythomax-l2-13b
Editor's verdict
MythoMax 13B is Gryphe's open-weight language models with a 4K-token context window.
At $0.06 per 1M output tokens, it is very cost-efficient for its class.
As an open-weight model you can self-host it or call it through a hosted API.
Best suited to strong narrative flow in fiction and expressive and detailed prose.
Frequently asked questions
MythoMax 13B supports a context window of 4096 tokens.
User reviews
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