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OpenAI Migration Playground

Side-by-side diff view when transforming OpenAI SDK code to unlimitedcodex with model mapping.

Tool strategy

What this tool gives you

Side-by-side diff view when transforming OpenAI SDK code to unlimitedcodex with model mapping. The tool is useful before checkout because it helps buyers make one specific OpenAI-compatible API access decision without sharing private secrets.

Best fit

Decision support and learning when the buyer needs to explore tradeoffs before committing.

Output

A recommendation, simulation, or guided plan that turns vague API access questions into a next action.

Next step

Use the recommendation to choose a test path, package, migration step, or 4-connection planning boundary.

Tool citation bundle

Intent, inputs, and output use cases

Explore package fit, retry behavior, migration diffs, model choice, or rate-limit planning before buying. Specific tool: Side-by-side diff view when transforming OpenAI SDK code to unlimitedcodex with model mapping.

Search intent

  • OpenAI Migration Playground
  • free migration playground
  • migration playground for OpenAI-compatible API

Input boundary

Use only non-secret planning inputs. Do not paste raw API keys, bearer tokens, full auth headers, private logs, customer data, or billing screenshots.

Result use cases

  • Explore API access tradeoffs before checkout.
  • Choose a package, retry plan, migration path, model value, or rate-limit boundary.
  • Convert uncertain setup questions into an ordered recommendation.

Before

import OpenAI from "openai";

const client = new OpenAI({ apiKey: process.env.OPENAI_API_KEY });

export async function runChat() {
  const response = await client.chat.completions.create({
    model: "gpt-4o",
    messages: [{ role: "user", content: "Validate before cutover." }],
    stream: true
  });

  return response;
}

After

import OpenAI from "openai";

const client = new OpenAI({ apiKey: process.env.UCX_API_KEY });

export async function runChat() {
  const response = await client.chat.completions.create({
    model: "gpt-5.5",
    messages: [{ role: "user", content: "Validate before cutover." }],
    stream: true
  });

  return response;
}

+0 / -0 / ~2 modified lines

• Updated: const client = new OpenAI({ apiKey: process.env.OPENAI_API_KEY }); -> const client = new OpenAI({ apiKey: process.env.UCX_API_KEY });

• Updated: model: "gpt-4o", -> model: "gpt-5.5",

• Warning: Streaming is not enabled on unlimitedcodex validation stubs. Set stream to false or handle 501 streaming_not_enabled.

Streaming is not enabled on unlimitedcodex validation stubs. Set stream to false or handle 501 streaming_not_enabled.

Ready for ChatGPT 5.5 Ultra and Codex API access?

Choose Unlimited Weekly or Unlimited Monthly, complete Stripe checkout, and receive manual setup in 10 minutes to 5 hours. The full API key arrives by email, while the dashboard safely shows delivery details.

OpenAI Migration Playground with Diff View | unlimitedcodex