DeepSeek-V4.1-Flash-1017 Description

DeepSeek-V4.1-Flash-1017 is an open-weight multimodal AI model designed for complex reasoning, autonomous agents, software development, and visual analysis. The model is an updated version of DeepSeek-V4.1-Flash, with improvements in benchmark performance, execution speed, and output efficiency. It supports text and image processing, enabling applications that combine natural language understanding with visual interpretation and reasoning. Its one-million-token context window allows developers to analyze large documents, extensive software repositories, and lengthy interactions while maintaining contextual information. Coding capabilities include generating software, debugging existing applications, modifying codebases, and completing multistep engineering assignments. The model also supports end-to-end project generation, including interactive games, 3D scenes, and other software applications. Agentic functionality includes external tool calling, configurable reasoning effort, multi-turn conversations, and workflows involving automated research and task execution. DeepSeek provides prompt encoding libraries, inference examples, and compatibility with deployment frameworks such as Hugging Face Transformers, vLLM, and SGLang. DeepSeek-V4.1-Flash-1017 is distributed under the MIT License and can be accessed through DeepSeek's website, mobile application, and API or deployed using its publicly available model weights.

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Pricing

Pricing Starts At:
Free
Free Version:
Yes

Integrations

API:
Yes, DeepSeek-V4.1-Flash-1017 has an API
View Integrations

Reviews - 1 Verified Review

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features
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Company Details

Company:
DeepSeek
Year Founded:
2023
Headquarters:
China
Website:
deepseek.com

Media

DeepSeek-V4.1-Flash-1017 Screenshot 1
DeepSeek-V4.1-Flash-1017 Screenshot 1 DeepSeek-V4.1-Flash-1017 Screenshot 2
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Product Details

Platforms
Web-Based
Windows
Mac
Linux
On-Premises
Types of Training
Training Docs
Customer Support
Online Support

DeepSeek-V4.1-Flash-1017 Features and Options

DeepSeek-V4.1-Flash-1017 User Reviews

Write a Review
  • Name: Anonymous (Verified)
    Job Title: Engineer
    Length of product use: Less than 6 months
    Used How Often?: Daily
    Role: User, Administrator, Deployment
    Organization Size: 100 - 499
    Features
    Ease
    Pricing
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Super fast and powerful open weight model

    Date: Oct 24 2026

    Summary: Overall, DeepSeek-V4.1-Flash-1017 is a super real refinement rather than a small patch. It is faster, more efficient, better at coding and agents, and strong enough that I would happily use it as an everyday model for software development and automation.

    Positive: What I notice most is how much better it is at actually finishing coding and agent tasks. It feels less meandering than the original V4.1 Flash and gets through multi-step work with fewer wasted tokens. The benchmark jump is pretty serious too. DeepSeek reports 77.0 on DeepSWE v1.1, 42.3 on Terminal-Bench 4.0, and 60.5 on Automation-Bench, all meaningfully higher than the previous V4.1 Flash release. I also like the project-building improvements. DeepSeek specifically trained this version with reinforcement learning and self-feedback for end-to-end development, including full web projects, games, and 3D work.

    Negative: The main downside is infrastructure if you want to run the open weights yourself. The full model is huge, so most people are still going to be better off using the hosted API.

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