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Model Library
/Deepseek/DeepSeek V3.1 Terminus
deepseek-ai/deepseek-v3p1-terminus

    DeepSeek-V3.1-Terminus is an updated version of DeepSeek-V3.1 with enhanced language consistency, reduced mixed Chinese-English text, and optimized Code Agent and Search Agent performance.

    DeepSeek V3.1 Terminus API Features

    Fine-tuning

    Docs

    DeepSeek V3.1 Terminus can be customized with your data to improve responses. Fireworks uses LoRA to efficiently train and deploy your personalized model

    Serverless

    Docs

    Immediately run model on pre-configured GPUs and pay-per-token

    On-demand Deployment

    Docs

    On-demand deployments give you dedicated GPUs for DeepSeek V3.1 Terminus using Fireworks' reliable, high-performance system with no rate limits.

    Available Serverless

    Run queries immediately, pay only for usage

    $0.56 / $1.68
    Per 1M Tokens (input/output)

    DeepSeek V3.1 Terminus FAQs

    What is DeepSeek V3.1 Terminus and who developed it?

    DeepSeek V3.1 Terminus is an updated version of DeepSeek V3.1 developed by DeepSeek AI. This release improves language consistency (reducing mixed Chinese-English output), and enhances the performance of the Code Agent and Search Agent.

    What applications and use cases does DeepSeek V3.1 Terminus excel at?

    DeepSeek V3.1 Terminus is well-suited for:

    • Code assistance
    • Conversational AI
    • Agentic systems
    • Search
    • Enterprise RAG (retrieval-augmented generation)
    • Multimedia tasks
    What is the maximum context length for DeepSeek V3.1 Terminus?

    The model supports a context length of 163,840 tokens on Fireworks AI.

    How many parameters does DeepSeek V3.1 Terminus have?

    The model has 685 billion parameters.

    Is fine-tuning supported for DeepSeek V3.1 Terminus?

    Yes. Fireworks supports fine-tuning this model using LoRA (Low-Rank Adaptation).

    What rate limits apply on the shared endpoint?

    When deployed on-demand (dedicated GPUs), no rate limits apply.

    What license governs commercial use of DeepSeek V3.1 Terminus?

    DeepSeek V3.1 Terminus is released under the MIT License, allowing commercial use.

    Metadata

    State
    Ready
    Created on
    9/23/2025
    Kind
    Base model
    Provider
    Deepseek
    Hugging Face
    DeepSeek-V3.1-Terminus

    Specification

    Calibrated
    Yes
    Mixture-of-Experts
    Yes
    Parameters
    671B

    Supported Functionality

    Fine-tuning
    Supported
    Serverless
    Supported
    Serverless LoRA
    Not supported
    Context Length
    163.8k tokens
    Function Calling
    Supported
    Embeddings
    Not supported
    Rerankers
    Not supported
    Support image input
    Not supported