# Openai Gpt

> OpenAI GPT models API for chat, completion, and embeddings. Use for AI integration.

- Skill: `g1joshi/openai-gpt` (Agent Skill)
- Install (CLI): `npx skillmds@latest add g1joshi/openai-gpt`
- Raw SKILL.md: https://api.skillmd.com/api/skills/g1joshi/openai-gpt/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: G1Joshi (https://skillmd.com/u/g1joshi)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/g1joshi/openai-gpt

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# OpenAI GPT

GPT (Generative Pre-trained Transformer) is the foundation of the modern AI revolution. In 2025, **GPT-5** offers agentic capabilities, deep reasoning, and native multimodal integration.

## When to Use

- **General Purpose**: It is the baseline for all AI tasks.
- **Complex Reasoning**: GPT-5 excels at multi-step logic and planning.
- **Vision/Voice**: Native "Omni" capabilities (GPT-4o/5) process audio and video with <300ms latency.

## Core Concepts

### Models

- **GPT-5**: The frontier model. Slow but smartest.
- **GPT-4o**: "Omni". Fast, multimodal, cheaper.
- **o1 / o3**: "Reasoning" models that "think" before answering (Chain of Thought).

### Assistants API

Stateful API for building agents. Manages threads, retrieval (RAG), and code interpreter.

### Structured Outputs

Guarantees JSON schema compliance for API responses.

## Best Practices (2025)

**Do**:

- **Use Structured Outputs**: Always define a Zod/JSON schema for production apps.
- **Use `o3-mini` for Code**: It is cheaper and often better at coding than GPT-4o.
- **Batch Requests**: Use the Batch API for 50% discount on non-urgent tasks.

**Don't**:

- **Don't use GPT-3.5**: It is obsolete. Use GPT-4o-mini for cheap tasks.

## References

- [OpenAI API Documentation](https://platform.openai.com/docs/introduction)