# DeepSeek-V3

> Open-weight 671B mixture-of-experts language model matching proprietary frontier systems

DeepSeek-V3 is an open Mixture-of-Experts language model with 671B total parameters and 37B activated per token. It delivers coding, math, and conversational performance comparable to top closed models like GPT-4o and Claude 3.5 Sonnet. It is accessible through a free web chat, an OpenAI-compatible API, and open model weights on Hugging Face.

Website: https://huggingface.co/deepseek-ai/DeepSeek-V3

## What it is for

- Run complex coding and debugging tasks across multiple programming languages
- Solve advanced mathematical problems and multi-step reasoning puzzles
- Deploy a large-scale open-weight model locally or on private cloud infrastructure
- Integrate an economical OpenAI-compatible chat API into developer applications

## Features

- Mixture-of-Experts (MoE) architecture activating 37B out of 671B parameters per token
- 128K context window length evaluated on needle-in-a-haystack tasks
- Trained with Multi-head Latent Attention (MLA) and native FP8 mixed precision
- Knowledge distillation from DeepSeek-R1 reasoning models
- Inference support via vLLM, SGLang, LMDeploy, and TensorRT-LLM
- Free web chat interface with built-in search and reasoning toggles
- Permissive model license allowing commercial use

## Pricing

Open source. Free web interface and open weights; pay-per-token API access via DeepSeek platform.

## Details

- Type: AI model
- Category: [AI](https://xiry.app/topics/ai.md)
- Open source: yes
- Platforms: Web, API, Self-hosted, Linux
- For: Developers, AI researchers, and end users wanting frontier-level conversational reasoning for free or self-hosted.
- Alternative to: ChatGPT, Claude, Llama 3.1 405B, Qwen 2.5 72B
- Tags: llm, deepseek, moe, open source, coding, chat assistant

## Why it was saved

- [@theaisurfer, 22 January 2025](https://www.instagram.com/reel/DFG8wXQSqvE/): Offers performance competitive with ChatGPT and proprietary frontier models for free, including reasoning outputs and internet search access.

## Compare

- [Alternatives to Claude](https://xiry.app/alternatives/claude.md)
- [Alternatives to ChatGPT](https://xiry.app/alternatives/chatgpt.md)

## Related

- [DeepSeek](https://xiry.app/resources/deepseek): Open-weights AI models and chat interface for reasoning, coding, and research. (AI model, Freemium)
- [DeepSeek-R1](https://xiry.app/resources/deepseek-r1): Open-source reasoning model rivaling proprietary models in math, code, and logic (AI model, Open source)
- [Pinokio](https://xiry.app/resources/pinokio): Browser that installs and runs open-source AI apps with one click (Desktop app, Free)
- [Claude](https://xiry.app/resources/claude): Anthropic's conversational AI assistant for analysis, writing, and coding (Web app, Freemium)
- [Hermes 3](https://xiry.app/resources/hermes-3): Open-weights fine-tune of Llama 3.1 built for agentic function calling. (AI model, Open source)
- [AnythingLLM](https://xiry.app/resources/anythingllm): Private, on-device AI assistant to chat with documents and local models. (Desktop app, Open source)

Updated 3 October 2026. Page: https://xiry.app/resources/deepseek-v3

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