GPT-5.5 API — pricing, playground & code

Name: GPT-5.5 API
Brand: OpenAI

Overview

About GPT-5.5

OpenAI's flagship, one key away. Every model on CompanyFabric shares the same API key, billing balance, and rate-limit envelope — one integration covers the entire library.

Facts

At a glance

Availability

Live

Pricing

$5/Mtok in

Metered exactly per call

Context window

256k tokens

Commercial use

See license

Commercial output use permitted per OpenAI terms.

Variants

All endpoints

GPT-5.5

$5/Mtok in

OpenAI's flagship, one key away.

Chat Completions

Prompt library

Example runs

Rewrite this refund email to be firm but warm. Keep under 120 words.

Hi Maya — thanks for flagging this…

This exact run cost $0.006

Quickstart

How to use the GPT-5.5 API

1
Create a free CompanyFabric account — starter credits are included, no card required.
2
Copy your API key from the dashboard. One key covers every model in the library.
3
Point any OpenAI SDK at api.companyfabric.com/v1 and set model to "openai/gpt-5.5".
4
Read the exact metered cost of the call from the response — the same number shown in the playground.

Use cases

What teams build with it

Agents & copilots

Drive agent loops, tool calls, and user-facing assistants over the OpenAI-compatible endpoint.

agentstool useassistants

Content pipelines

Summarization, rewriting, and structured generation at metered per-token cost.

contentsummarization

Extraction & classification

Turn unstructured input into typed JSON with schema-constrained output.

extractionjson mode

Get better output

Prompting tips

State the output format before the task — models follow contracts declared early.
Few-shot beats description: two worked examples outperform a paragraph of rules.
Cap output length explicitly when cost matters; output tokens dominate most bills.

Exact, metered, prepaid

Pricing

Endpoint	Type	Price
GPT-5.5	Chat	$5 / M input · $20 / M output

Production-grade

Code samples

import OpenAI from "openai"

const client = new OpenAI({
  baseURL: "https://api.companyfabric.com/v1",
  apiKey: process.env.COMPANYFABRIC_API_KEY,
})

const res = await client.chat.completions.create({
  model: "openai/gpt-5.5",
  max_tokens: 1024,
  temperature: 0.7,
  messages: [{ role: "user", content: "Say hello from the fabric." }],
})

console.log(res.choices[0].message.content)

Playground

Try it in the browser

Playground$5 in / $20 out per 1M tokens

Model

Max output tokens

Prompt

≈ $0.0206

Comparisons

GPT-5.5 vs the alternatives

GPT-5.5 vs Claude Sonnet 4.5

GPT-5.5 and Claude Sonnet 4.5 compete for the same text workloads. Both run behind the same CompanyFabric key at exact metered prices — A/B them on your real prompts and let the outputs decide, then switch with a one-line change.

GPT-5.5 vs Gemini 3.1 Pro

GPT-5.5 and Gemini 3.1 Pro compete for the same text workloads. Both run behind the same CompanyFabric key at exact metered prices — A/B them on your real prompts and let the outputs decide, then switch with a one-line change.

FAQ

Frequently asked questions

How much does the GPT-5.5 API cost?

$5 / M input · $20 / M output. Every call is metered exactly and shown before you run it.

How do I get a GPT-5.5 API key?

Create a CompanyFabric account, and one key unlocks GPT-5.5 and every other model in the library. Free starter credits are included — no subscription, no card required to try it.

Why use GPT-5.5 on CompanyFabric instead of going direct?

One key, one prepaid balance, and one rate-limit envelope across the whole library, at pricing at parity with or below the direct API. Model switching is a one-line change, and BYOK routing is 0% fee.

Is the API OpenAI-compatible?

Yes — point any OpenAI SDK at api.companyfabric.com/v1 and set model to "openai/gpt-5.5".

Can I use the output commercially?

Commercial output use permitted per OpenAI terms.

How does billing work?

Prepaid credits via card, or BYOK with your own provider keys at 0% platform fee. No subscription required; balances never expire.

Provider