SUN, AUGUST 02, 2026
Independent · In‑Depth · Practitioner‑Tested
ChatGPT Coding

Best ChatGPT Prompts for Coding (2026) — GPT-5.6 and Codex

GPT-5.6 Sol scored 88.8% on Terminal-Bench 2.1 — the highest of any closed model. OpenAI Codex (persistent cloud sessions via the Ona acquisition) lets you assign a coding task and return to a completed PR. GPT-5.6 Terra at $2.50/M is the cost-efficient option for coding at volume. These prompts are optimised for ChatGPT Plus with GPT-5.6, the OpenAI API, and OpenAI Codex persistent sessions.

⌨️ 6 prompts 🕐 Updated Aug 2, 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
Assign to Codex — Async PR Task
Assign a full coding task to Codex for async completion with a PR
[OPENAI CODEX — PERSISTENT SESSION]

Assign the following task. Work through it completely and open a PR when done. Do not wait for me.

Task: [DESCRIBE THE CHANGE IN PLAIN ENGLISH]
Repository: [REPO NAME OR CONTEXT]
Branch: create a new branch named [feature/TASK-NAME]
Tests: write or update tests for every change you make
PR description: include what changed, why, and how to test it

When the PR is open, summarise what you did in 3 bullet points.
2
Debug a Production Error With Full Context
Debug any production error with full context including root cause and a test
I have a production error. Help me debug it.

Error message: [PASTE THE FULL ERROR AND STACK TRACE]
What the user was doing: [DESCRIBE THE USER ACTION THAT TRIGGERED IT]
Code involved: [PASTE THE RELEVANT CODE]
When it started: [DATE OR DEPLOY — did it start after a change?]
Frequency: [ALWAYS / INTERMITTENT / AFTER X USES]

Diagnose:
1. What is causing this error? (Be specific about code location)
2. Is this a code bug, a data problem, or an environment issue?
3. The fix
4. A test to verify the fix
5. Whether this error pattern could appear elsewhere in the codebase
3
Implement an OpenAI Function Tool
Implement any OpenAI function tool with schema, implementation, and usage example
Implement a function tool for the OpenAI API that does the following.

Tool purpose: [DESCRIBE WHAT THE TOOL DOES — what the model can call it for]
Function name: [SNAKE_CASE NAME]
Parameters: [LIST WHAT THE FUNCTION TAKES AND THEIR TYPES]
Returns: [WHAT IT GIVES BACK TO THE MODEL]
Side effects: [ANY EXTERNAL CALLS, DATABASE WRITES, ETC.]
Language: [PYTHON / TYPESCRIPT / OTHER]

Output:
1. The tool schema (JSON for the tools parameter)
2. The function implementation
3. Example of calling the API with this tool and handling the function call response
4
Code a LangChain / Custom Agent Chain
Build a complete multi-tool agent chain with working code and extension points
Build the following agent chain. Output complete, working code.

Agent task: [DESCRIBE WHAT THE AGENT SHOULD DO — multi-step, what tools it needs]
Framework: [LANGCHAIN / VANILLA OPENAI / OTHER]
Tools needed: [LIST — e.g. web search, calculator, database lookup, code executor]
Language: [PYTHON / TS]
Error handling: [WHAT TO DO IF A TOOL CALL FAILS]

Output:
1. Complete code with all imports
2. Tool definitions
3. Agent loop
4. Example run with output
5. Where to extend it if I want to add another tool later
5
Optimise an Existing Prompt
Diagnose and fix any underperforming prompt with a specific rewrite
I have a prompt that is not performing well. Help me improve it.

Model I am using: [GPT-5.6 SOL / TERRA / LUNA]
What the prompt is for: [DESCRIBE THE TASK]
My current prompt: [PASTE PROMPT]
What is going wrong: [DESCRIBE THE FAILURE MODE — too verbose, wrong format, misses edge cases, etc.]

Diagnose what is wrong with the current prompt, then rewrite it to fix the specific issue. Show me:
1. What was wrong (specific, not generic advice)
2. The improved prompt
3. One example input where the old prompt would fail and the new one would succeed
6
Extract Structured Data From Unstructured Text
Extract any structured data from unstructured text with accuracy validation
Extract the following structured data from the text below. Output only the data — no prose, no explanation.

What to extract: [DESCRIBE PRECISELY — e.g. company names, dates, dollar amounts, person names and their roles]
Output format: [JSON / CSV / MARKDOWN TABLE]
If a field is missing from the text: write null / n/a / "not found" — do not infer or guess
If a value is ambiguous: include it with a flag like "(uncertain)"

Text: [PASTE TEXT]

Double-check: read the output against the text to confirm every value matches what is written.