DeepSeek V3.1 Base

DeepSeek chatreasoning Free

API ID: deepseek/deepseek-v3.1-base

Input Price
Free
/1M tokens
Output Price
Free
/1M tokens

About DeepSeek V3.1 Base

DeepSeek V3 represents the latest evolution of DeepSeek's flagship model, delivering exceptional performance at remarkably low costs. Using an efficient Mixture-of-Experts architecture with 671 billion total parameters but only 37 billion active per token, it achieves GPT-4-class capability while maintaining industry-leading affordability. The model excels at complex reasoning, coding, mathematics, and multilingual tasks. DeepSeek V3 features a 128K context window and demonstrates strong performance across major benchmarks. Its open weights enable self-hosting for organizations with data privacy requirements. The model has disrupted market expectations about AI pricing, proving that frontier capability doesn't require frontier costs. For developers seeking maximum capability per dollar, DeepSeek V3 offers compelling economics that have influenced pricing across the industry.

🏆
Price Ranking
#1 lowest price among 599 Chat models — Top 20% cheapest!

Model Specifications

Context Length
164k
Max Output
—
Release Date
2025-08-20
Capabilities
chat reasoning
Input Modalities
text
Output Modalities
text

Best For

  • Complex reasoning, math problems, multi-step logic
  • Conversations, content writing, general assistance

Consider Alternatives For

  • Image understanding (needs vision capability)
  • Simple Q&A (cheaper models available)
🎉

This model is completely free!

No token costs - use it without worrying about API bills.

Estimate Token Usage

DeepSeek Model Lineup

Compare all models from DeepSeek to find the best fit

Model Input Output Context Capabilities
DeepSeek V3.1 Base Current Free Free 164k chat reasoning
DeepSeek V3 Base Free Free 131k chat
DeepSeek V2.5 Free Free 128k chat
R1 Distill Llama 8B Free Free - chat reasoning
R1 0528 Free Free 164k chat reasoning tool_use
R1 Distill Qwen 7B Free Free 131k chat reasoning code

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Allen AI Molmo2 8B (free)
Input: Free
Output: Free
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🚀 Quick Start

Get started with DeepSeek V3.1 Base API

OpenAI-compatible SDK
from openai import OpenAI

client = OpenAI(
    base_url="https://api.provider.com/v1",
    api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
    model="deepseek/deepseek-v3.1-base",
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(response.choices[0].message.content)