What is OpenAI Academy?

OpenAI Academy is the premier free interactive learning platform by Infinity Tech Stack designed to help developers master OpenAI's models and APIs, including ChatGPT, GPT-4o, GPT-5.6, the Responses API, and the Agents SDK through 23 modules, 43 lessons, 9 terminal labs, and 99 quizzes with zero sign-up required.

How is Infinity OpenAI Academy different from official OpenAI Academy?

While OpenAI's official initiative (academy.openai.com) invests in developer communities and enterprise incubation, Infinity Tech Stack's OpenAI Academy is an independent, 100% free developer learning platform requiring no sign-up. It provides 23 deep technical modules, 43 lessons, 9 interactive in-browser terminal labs, and 99 quizzes covering the Responses API, Agents SDK, GPT-4o, GPT-5.6, structured outputs, and fine-tuning with zero barrier to entry.

Is the OpenAI Academy free?

Yes, 100% free. No sign-up, no credit card. All 23 modules, 43 lessons, 9 terminal labs, and 99 quizzes are immediately accessible. Progress saves locally in your browser.

What topics does the OpenAI Academy cover?

The course covers ChatGPT essentials, Custom GPT creation, API integration, the Responses API, the Agents SDK, and frontier reasoning models.

Do I need programming experience?

No prerequisites required for the first modules (ChatGPT and Custom GPTs). The later modules on the API and Agents SDK require basic programming knowledge, particularly in JavaScript or Python.

What is the Responses API?

The Responses API is the unified endpoint introduced in 2025/2026 that replaces both Chat Completions and the Assistants API, offering built-in tools like web search and native conversational memory.

What is the difference between GPT-5.6 Luna, Terra, and Sol?

Luna is the ultra-fast, cost-efficient edge model. Terra is the balanced daily driver offering high performance for cheaper. Sol is the flagship model with an 'Ultra' setting for complex parallel multi-agent orchestration.

Does the OpenAI Academy include hands-on labs?

Yes. Hands-on terminal labs are built into the lessons - call the Responses API with curl and invoke frontier models with the Ultra setting using real, vendor-verified commands. Labs include objectives, hints, solutions, and XP rewards. No sign-up or setup needed.

What is the modern replacement for Assistants API persistent Threads and Runs?

The Conversations API and the managed sessions in the OpenAI Agents API — The Conversations API and Agents API provide modern, fully supported session persistence and asynchronous execution harnesses.

Why should new projects use the Responses API instead of legacy endpoints?

The Responses API has all Assistants features plus web search, CUA, MCP, automatic prompt caching, and better performance — The Responses API is a complete superset featuring native prompt caching, web search, computer use, and low latency.

Threads, Runs & Tools [2026]

[ ABORT TO HUD ]

SEQ. 1

Threads, Runs & Tools

📦 Assistants API (Legacy) 18 min 250 BASE XP

The Legacy Stateful API (Sunset Completed)

The Assistants API was OpenAI's first attempt at stateful AI infrastructure. As of August 26, 2026, the Assistants API was officially retired and shut down. Calls to /v1/assistants, /v1/threads, and /v1/runs now return 410 Gone. All developers must migrate to the Responses API, the Conversations API, or the Agents API (launched September 10, 2026).

Core Concepts (Historical Reference)

Assistant: An AI entity with custom instructions, a model choice, and enabled tools. (Replaced by Agent in the Agents API / SDK).
Thread: A persistent conversation session. (Replaced by conversation_id in the Conversations API and managed sessions in Agents API).
Message: Text or files added to a Thread by a user or Assistant.
Run: The asynchronous execution of an Assistant on a Thread. (Replaced by synchronous streaming in Responses API and background executions in Agents API).

Migration Matrix (August 2026+)

Legacy Assistants Feature	Modern Replacement	Migration Path
File Search (Vector Store)	Responses API `file_search` tool	Attach vector store ID directly to `/v1/responses` payload
Code Interpreter	Agents API Sandboxed Python or Responses API `code_interpreter`	Zero client maintenance with native container execution
Custom Functions	Agents SDK `@function_tool` or Responses API `tools`	Strictly typed Pydantic or JSON schema execution
Persistent Threads	Conversations API / Agents API Sessions	Store session state automatically on managed cloud harness

🚨 SUNSET COMPLETE (August 26, 2026): The Assistants API is permanently offline. Production applications must route traffic to the Responses API for low-latency completions or the OpenAI Agents API for stateful, sandboxed agent operations. Azure OpenAI workloads must migrate to Microsoft Foundry Agent Service.

SYNAPSE VERIFICATION

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What is the official operational status of the OpenAI Assistants API as of August 26, 2026?

Active and recommended for new projects

Fully sunset and retired - endpoints return 410 Gone and developers must use Responses API or Agents API

Only available on free accounts

Renamed to Chat Completions