How to Access GPT-5.5?

GPT-5.5 is a large language model that has garnered attention since its release and offers new performance benchmarks. GPT-5.5 provides state-of-the-art performance in areas such as coding, agentic coding, tool use, computer use, and scientific research. If you want to use GPT-5.5 but don't know how to access it or effectively integrate it into your enterprise, we've got you covered! 

In this article, we will explain what GPT-5.5 is and how to access it.

TL; DR

OpenAI's GPT-5.5 launched on April 23, 2026, outpacing GPT-5.4 and Claude Opus 4.7 on most benchmarks while using fewer tokens. Its standout strengths are agentic task execution (multi-tool calls, self-correction, sub-agent handling), advanced coding (multi-file refactoring, TypeScript/Python, debugging), and faster reasoning. ChatGPT Plus $5 per million input tokens and $30 per million output tokens, but higher efficiency partially offsets the rate increase. For enterprise integration, TextCortex provides workflow automation, knowledge bases, and AI agent infrastructure with GPT-5.5 as an available model. Developers can also tap it via OpenAI API or Codex, and it can be downloaded through GitHub Models Playground or the Codex app.

What is ChatGPT-5.5?

GPT-5.5 is a large language model released by OpenAI on April 23, 2026, that stands out with its low token usage and better performance than its predecessor and competitors. GPT-5.5 offers users advanced coding, reasoning, agentic tool use, computer use, agentic coding, knowledge work, and scientific research.

GPT-5.5 Capabilities and Power Spikes

Like any new model, GPT-5.5 offers advanced features, but what are these features and what do they do? One of the first and most powerful features of GPT-5.5 is its agentic task performance. GPT-5.5 is ideally suited for agentic task completion. This is primarily because GPT-5.5 offers high performance in tasks requiring multiple tool calls, self-correction, failing case identification, and branching logic. While other large language models excel at single AI agent management, GPT-5.5 also enhances sub-agent management.

One of the strong points of the GPT-5.5 model is its coding performance. The GPT-5.5 model excels in multi-file refactoring, test generation, TypeScript and Python, and debugging with access tools. Furthermore, the GPT-5.5 model can generate output much faster and complete reasoning tasks more quickly than the GPT-5.4 model. This is because the GPT-5.5 model is more effective than GPT-5.4 and its competitors in token generation and token usage.

GPT-5.5 Pricing

To use the GPT-5.5 model via ChatGPT, you'll need to purchase a Plus or higher subscription tier, which costs $20 per month. If you want to use the GPT-5.5 model as an API, the pricing is double that of the GPT-5.4 model: $5 per million input tokens and $30 per million output tokens. However, the difference is less than double because the GPT-5.5 model generates better output using significantly fewer tokens than the GPT-5.4 model.

GPT-5.5 vs. Claude Opus 4.7: Which is Better?

According to OpenAI's GPT-5.5 release paper, the GPT-5.5 model has higher performance and scores than the Claude Opus 4.7 model in most benchmarks. While the GPT-5.5 is more powerful in terms of raw power, the choice between the GPT-5.5 and the Opus 4.7 is entirely up to the user. The Opus 4.7 model is optimized for multi-step agentic tasks, and the GPT-5.5 model is also optimized for multi-step agentic tasks within its own ecosystem.

How to Access GPT-5.5?

There are several different methods you can use to access the GPT-5.5 model. Let's discover the ways to access GPT-5.5 together.

Accessing GPT-5.5 via TextCortex

An innovative and sophisticated way to access the GPT-5.5 model is to use it through TextCortex. TextCortex, a leading knowledge management and AI agent infrastructure company, aims to reduce time spent on repetitive and complex workflows by providing knowledge bases and an AI agent framework. TextCortex offers its users a wide range of large language model options, including GPT-5.5. In other words, you can automate your workflows using various LLMs, including GPT-5.5, with TextCortex. TextCortex also provides its users with knowledge bases that allow them to upload or connect their internal databases.

With your custom knowledge bases, you can use it as tracing data or memory for your AI agent, and integrate your knowledge bases into the automation process. Some of the other best features of TextCortex include:

• Web Search
• Connectors and Skills
• Browser Extension
• Multiple Image Generators such as Gemini 3

Accessing the GPT-5.5 model with TextCortex is a simple and straightforward process; all you have to do is select GPT-5.5 as the default model for your AI agent.

Accessing GPT-5.5 via ChatGPT

The easiest way to access the GPT-5.5 model is through ChatGPT. If you have a ChatGPT Plus or higher subscription, which costs $20 per month, you can use the GPT-5.5 model through ChatGPT. However, ChatGPT Plus and higher subscriptions do not offer unlimited access to the GPT-5.5 model; they only allow limited use.

Accessing GPT-5.5 via API

If you want to use the GPT-5.5 model for your own AI tool or development, you can access it as an API. To use GPT-5.5 as an API, you need to generate an API key from OpenAI. After that, you can start using the GPT-5.5 model in your own development environment. The GPT-5.5 model has API pricing twice as high as the GPT-5.4 model. However, in return for this price increase, you get better performance and more efficient token usage.

Accessing GP-5.5 via Codex

If you want to use the GPT-5.5 model for development and coding, you can access it through Codex, OpenAI's coding environment. Codex is a coding AI agent platform developed by OpenAI. With Codex, you can integrate the GPT-5.5 model into your development process and use it as an AI agent.

To Sum It Up

If you want to integrate the GPT-5.5 model into your enterprise, TextCortex is the best choice. You can also use GPT-5.5 as a chatbot or an AI agent with TextCortex. If you'll be using the GPT-5.5 model for everyday tasks, ChatGPT is a good option. If you'll be using the GPT-5.5 model for coding tasks, OpenAI Codex and TextCortex are good choices.

Frequently Asked Questions

Is GPT-5.5 out?

The GPT-5.5 model was released on April 23, 2026.

How can I access GPT-5.5?

The most basic methods for accessing the GPT-5.5 model are TextCortex, ChatGPT, Codex, and APIs.

Can I download the GPT-5.5 model?

You can download and use the GPT-5.5 model via GitHub Models Playground or the Codex application.

How to use GPT-5.5?

To use the GPT-5.5 model, you need a ChatGPT Plus or higher subscription.