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DeepSeek: Reasoner

DeepSeek
Streaming Reasoning
4K
Context
$0.5500
Input /1M
$2.19
Output /1M
4K
Max Output
Run API Call Open in Chat

DeepSeek: Reasoner

Model Overview

Property Value
Model ID deepseek/deepseek-reasoner
Name DeepSeek Reasoner
Provider DeepSeek

Description

DeepSeek's specialized reasoning model designed for complex problem-solving, mathematical proofs, and logical analysis. Features extended thinking capabilities for step-by-step reasoning.

Specifications

Spec Value
Context Window 4,096 tokens
Max Completion 4,096 tokens
Modalities Text

Pricing

Type Price
Input $0.55 per 1M tokens
Output $2.19 per 1M tokens

Capabilities

  • Advanced Reasoning: Yes
  • Mathematical: Yes
  • Step-by-Step Thinking: Yes
  • Streaming: Yes

Use Cases

Mathematical problem solving, logical reasoning, complex analysis, research tasks.

Integration with LangMart

Gateway Support: Type 2 (Cloud), Type 3 (Self-hosted)

API Usage:

curl -X POST https://api.langmart.ai/v1/chat/completions \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek/deepseek-reasoner",
    "messages": [{"role": "user", "content": "Solve this step by step"}],
    "max_tokens": 4096
  }'
  • deepseek/deepseek-chat - General chat model

Last Updated: December 28, 2025