5buyai × AIFUNS
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OpenAI API (direct connection)
OpenAI API (direct connection)
The OpenAI API gives developers programmatic access to GPT-family models for text, chat, code, image, and speech tasks,...

About this product

The OpenAI API lets developers build GPT models into their own products: chat and text generation, image generation and understanding, speech recognition and synthesis, embeddings, real-time voice, and agents that call tools and search the web (Responses API, Agents SDK). It is billed by usage and suits AI support bots, content generation, data processing, internal tools and more.

Which plan to choose

  • Account: an OpenAI developer platform account you can top up yourself.
  • US$100: API credit, charged by token usage.
  • KYC verification (API Organization Verification): some of the newest models, image generation and streaming of reasoning require a verified organisation.
Build with the OpenAI API
Chat · Intermediate
AI support bots and assistants
Add GPT to your website, app or messaging channels.
Content · Intermediate
Content at scale
Product copy, translation and summaries — cheaper with the Batch API.
Multimodal · Advanced
Images, speech and real-time voice
Generate and understand images, transcribe speech and build live voice apps.
Agents · Advanced
Agents that use tools
Build automations with the Responses API and Agents SDK.
More models · Intermediate
Want several providers?
OpenRouter gives you hundreds of models with one key.
About OpenRouter →

Getting started

  1. Sign in at platform.openai.com and switch to the right organisation.
  2. Create an API key: API keys → Create new secret key; copy and store it safely (it is shown only once).
  3. Set limits under Limits / Billing to avoid unexpected spend.
  4. Make calls with the official Python or Node.js SDK following the docs, or paste the key into OpenAI-compatible tools.
  5. Track usage on the Usage page.

Tips

  • Keep keys on the server only — never in front-end code or public repositories.
  • Test with cheaper small models first, then move up once results are right.
  • Use the Batch API for non-real-time bulk jobs at lower cost.
Check before buying
Display listing — confirm the quote with support before paying; company transfers and invoices available.
No after-sales for bans caused by OpenAI's policies.

ChatGPT official tools

Made by OpenAI. Beyond the web app there are desktop and mobile apps, a Chrome extension, Office extensions, the Codex coding agent, the ChatGPT Work agent, and hundreds of official plugins.

12 Apps & products · 17 Everyday features · 343 Plugins · 39 Skills

Apps & products 12

Bring files, apps and knowledge together so ChatGPT can push complex projects to finished deliverables — reports, reconciliations, research.

All plans, including FreeDesktop · Web · Mobile

OpenAI’s coding agent for pull requests, refactors, code review and automation in parallel — in the ChatGPT desktop app, on the web and in the terminal.

All plans, including FreeDesktop · Web · Terminal · IDE

Connect your phone to the ChatGPT desktop app to manage tasks, watch progress and stay in sync with your code and workflows.

See official siteMobile · Desktop

Use ChatGPT in Slack or Microsoft Teams to bring company context into the conversation and turn discussions into work.

See official siteSlack / Teams

Knows your priorities, takes on ongoing tasks and keeps working between conversations.

Pro and upWeb · Desktop · Mobile

Gather project context, files and shared pages in one place to create and collaborate with ChatGPT.

Pro and upWeb
OpenAI APIThis product

Pay-as-you-go API access to OpenAI models.

See official siteWeb

Everyday features 17

Searches the web for current information and cites sources.

All plans, including FreeWeb · Desktop · Mobile

Browses hundreds of sources to produce a thorough, cited report.

All plans, including FreeWeb · Desktop · Mobile

Create images from a sentence or edit your photos precisely, with preset styles and popular prompts.

All plans, including FreeWeb · Desktop · Mobile

Describe an idea and build websites, dashboards, games, slides and apps by chatting, then publish and share.

Plus and upWeb

@-mention a plugin so ChatGPT can use Google Drive, SharePoint, GitHub, Canva and more — the official plugin directory is listed below.

All plans, including FreeWeb · Desktop

Tap the voice icon to talk — answers, brainstorming, language practice, live translation; video is on Go and up.

All plans, including FreeMobile · Web · Desktop

Remembers preferences and past chats — limited on Free, longer on Go and Plus, largest on Pro.

All plans, including FreeWeb · Desktop · Mobile

Group chats, files and instructions for one piece of work into a project.

All plans, including FreeWeb · Desktop · Mobile

Have ChatGPT run things on a schedule, like a morning news brief or weekly reminders.

Go and upWeb · Desktop · Mobile

Upload PDFs, spreadsheets and images to summarize, query, calculate and chart; Plus adds interactive tables and charts.

All plans, including FreeWeb · Desktop · Mobile

Build a dedicated assistant from your instructions, files and plugins, for yourself or to share.

Plus and upWeb · Desktop

Step-by-step guidance with knowledge checks and progress tracking instead of handing over answers.

All plans, including FreeWeb · Mobile

Discover products, compare options and get personalized shopping help.

See official siteWeb · Mobile

Connect Apple Health and supported medical records for better-informed, personalized health conversations.

See official siteMobile · Web

ChatGPT’s own browser opens and works through web pages when a task needs it.

All plans, including FreeDesktop · Web

Plugins 343

See all 343 plugins →

Skills 39

aspnet-core✓ Build, review, refactor, or architect ASP.NET Core web applications using current official guidance for .NET web development. Use when working on Blazor Web Apps, Razor Pages, MVC, Minimal APIs, controller-based Web APIs, SignalR, gRPC, middleware, dependency injection, configuration, authentication, authorization, testing, performance, deployment, or ASP.NET Core upgrades. chatgpt-apps✓ Build, scaffold, refactor, and troubleshoot ChatGPT Apps SDK applications that combine an MCP server and widget UI. Use when Codex needs to design tools, register UI resources, wire the MCP Apps bridge or ChatGPT compatibility APIs, apply Apps SDK metadata or CSP or domain settings, or produce a docs-aligned project scaffold. Prefer a docs-first workflow by invoking the openai-docs skill or OpenAI cli-creator✓ Build a composable CLI for Codex from API docs, an OpenAPI spec, existing curl examples, an SDK, a web app, an admin tool, or a local script. Use when the user wants Codex to create a command-line tool that can run from any repo, expose composable read/write commands, return stable JSON, manage auth, and pair with a companion skill. cloudflare-deploy✓ Deploy applications and infrastructure to Cloudflare using Workers, Pages, and related platform services. Use when the user asks to deploy, host, publish, or set up a project on Cloudflare. define-goal✓ Help the user define a concrete, measurable goal before starting work, especially when they ask to use the goal tool, create a goal, set an objective, clarify success criteria, or turn a fuzzy intention into a quantitative outcome. Use this skill for goal creation and goal refinement only; it does not manage durable snapshots, decision logs, or long-running execution artifacts. figma✓ Use the Figma MCP server to fetch design context, screenshots, variables, and assets from Figma, and to translate Figma nodes into production code. Trigger when a task involves Figma URLs, node IDs, design-to-code implementation, or Figma MCP setup and troubleshooting. figma-code-connect-components✓ Connects Figma design components to code components using Code Connect mapping tools. Use when user says "code connect", "connect this component to code", "map this component", "link component to code", "create code connect mapping", or wants to establish mappings between Figma designs and code implementations. For canvas writes via `use_figma`, use `figma-use`. figma-create-design-system-rules✓ Generates custom design system rules for the user's codebase. Use when user says "create design system rules", "generate rules for my project", "set up design rules", "customize design system guidelines", or wants to establish project-specific conventions for Figma-to-code workflows. Requires Figma MCP server connection. figma-create-new-file✓ Create a new blank Figma file. Use when the user wants to create a new Figma design or FigJam file, or when you need a new file before calling use_figma. Handles plan resolution via whoami if needed. Usage — /figma-create-new-file [editorType] [fileName] (e.g. /figma-create-new-file figjam My Whiteboard) figma-generate-design✓ Use this skill alongside figma-use when the task involves translating an application page, view, or multi-section layout into Figma. Triggers: 'write to Figma', 'create in Figma from code', 'push page to Figma', 'take this app/page and build it in Figma', 'create a screen', 'build a landing page in Figma', 'update the Figma screen to match code'. This is the preferred workflow skill whenever the u figma-generate-library✓ Build or update a professional-grade design system in Figma from a codebase. Use when the user wants to create variables/tokens, build component libraries, set up theming (light/dark modes), document foundations, or reconcile gaps between code and Figma. This skill teaches WHAT to build and in WHAT ORDER — it complements the `figma-use` skill which teaches HOW to call the Plugin API. Both skills s figma-implement-design✓ Translates Figma designs into production-ready application code with 1:1 visual fidelity. Use when implementing UI code from Figma files, when user mentions "implement design", "generate code", "implement component", provides Figma URLs, or asks to build components matching Figma specs. For Figma canvas writes via `use_figma`, use `figma-use`.
See all 39 skills →

Latest official updates last 45 days

Compiled by 5buyai from official websites, directories and GitHub repositories — not an official page; plan details follow the official terms · Plans checked 2026-10-21

Getting started

① Suitable for machine learning.

② Open the OpenAI API website, sign in, switch organisation and generate a key.

③ Call the API following the OpenAI documentation.

④ We provide API Organization Verification. After paying, just send us the verification page URL, which looks like "https://withpersona.com/verify?inquiry-id=inq_GjNzrk2SyoGYqwYjW3YHZ4RBtj24".

This listing is for display only: please confirm the final quote with the AIFUNS team before paying. Company bank transfers and invoices are available.

How it is delivered

🙋 Manual delivery ⏰ Working hours UTC+8 09:00–21:00 📧 Sent to your order email, also viewable once on the order page

After-sales policy

① Because of OpenAI's policies, we provide no after-sales support for losses caused by bans or loss of access.

Note: if you need a different amount of API credit, click "Chat with the AIFUNS team" (bottom right). If no one replies within a minute, leave your email or other contact details and we will get back to you soon.

What AI services does 5buyai.com support? Can I get an invoice?

Accounts, subscriptions and top-ups for ChatGPT, Claude, Midjourney, Gemini, Grok and other major AI tools. Invoices are available for AI orders paid in Chinese yuan (CNY).

How do I receive my order after paying?

Orders are delivered manually: after successful payment, the account or card code is sent to your order email during working hours (9:00–21:00, UTC+8). You can check your order details anytime on the order lookup page by order number, email or browser cache.

What payment methods are supported?

Alipay, WeChat Pay, USDT, and Credit Card payments. Credit card payments require first topping up your balance, and then using the balance to purchase products.

Do I need an account to buy?

No. You can check out as a guest and receive items by email; registering lets you manage orders, balance and invoices in one place.

Are prices shown in CNY?

All prices are listed in Chinese Yuan (¥). When paying with USDT the amount is converted automatically at the live rate.

Is there after-sales support?

After-sales support is available for some products, handled via live chat or the order dispute page. Accounts are virtual products: once delivered, no refunds are given unless there is an after-sales issue. CNY refunds and USD refunds are only made back to the original payment method, and USDT refunds are only made on the BSC network.

I am a business buyer and need to make a bulk purchase. How can I get in touch?

Please click the chat widget at the bottom-right corner to reach us and leave your email or other contact details. We will get back to you as soon as possible.

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Disclaimer
This is an independent third-party platform, not affiliated with, endorsed by, or authorized by any brand mentioned. We do not host any third-party login page and do not collect third-party credentials.
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