TUE, JULY 21, 2026
Independent · In‑Depth · Practitioner‑Tested
DeepSeek Coding

Best DeepSeek V4 Prompts for Coding (2026)

DeepSeek V4 Pro at $0.44/$0.87/M (discounted) is the most cost-efficient coding model available in July 2026 — 7-17x cheaper than Western frontier alternatives. V4 Flash at $0.14/$0.28/M is ideal for high-volume routing and classification tasks. These prompts are optimised for the DeepSeek API and the Anthropic Messages endpoint (now available at api.deepseek.com/anthropic). Important: migrate your deepseek-chat alias to deepseek-v4-flash before July 24 at 15:59 UTC.

⌨️ 6 prompts 🕐 Updated Jul 21, 2026
💡 How to use these prompts: Replace everything in [BRACKETS] with your specific details before sending. Click Copy to copy any prompt to your clipboard instantly.
1
Debug This Code
Debug any code error with root cause analysis
You are an expert software engineer. Debug the following code: [PASTE CODE] Error: [PASTE ERROR MESSAGE] Please: 1. Identify the root cause 2. Provide the corrected code 3. Explain why the error occurred 4. Suggest how to prevent it Note: Thinking mode is ON by default in V4 Flash — use extended reasoning to work through complex bugs systematically.
2
Generate Code From Requirements
Generate production-ready code from a plain English description
Write [LANGUAGE/FRAMEWORK] code for the following requirement: Requirement: [DESCRIBE WHAT THE CODE SHOULD DO] Input: [WHAT DATA OR PARAMETERS] Output: [WHAT SHOULD BE RETURNED OR PRODUCED] Constraints: [PERFORMANCE, LIBRARY, OR STYLE REQUIREMENTS] Include error handling and inline comments. Make it production-ready.
3
Code Review
Get a thorough code review with actionable feedback
Review the following code as a senior engineer. Focus on: - Correctness and bugs - Performance bottlenecks - Security issues - Readability and patterns [PASTE CODE] Be specific. Line numbers where relevant.
4
Refactor for Efficiency
Refactor code for better performance with explained trade-offs
Refactor the following code to improve efficiency without changing functionality. For each change: 1. Explain what you changed 2. Why it is more efficient 3. Any trade-offs [PASTE CODE] Target: [PERFORMANCE GOAL — e.g. reduce API calls, lower memory usage]
5
Generate SQL Queries
Generate optimized SQL queries from plain English
Write SQL for the following requirements. Use [PostgreSQL / MySQL — specify]. Requirement: [DESCRIBE WHAT YOU NEED] Schema: [PASTE TABLE DEFINITIONS] Return the query with inline comments. Include any relevant indexes I should create.
6
API Integration Code
Generate complete API integration code with error handling
Write [LANGUAGE] code to integrate with the [API NAME] API. I need to: [LIST SPECIFIC API OPERATIONS] Auth method: [API KEY / OAuth / Bearer token] Base URL: [API BASE URL] Include error handling, rate limiting awareness, and retry logic. Show a working example call.