On April 23, 2026, OpenAI released the new GPT-5.5 model (ID: openai/gpt-5.5).
Its main feature is the transition to more autonomous work: the model does not just give answers; it is capable of independently planning and executing complex multi-step tasks from start to finish, even with vague instructions.
🧠 Key Technological Breakthroughs
From Answers to Actions (Agentic Workflow): The main difference in GPT-5.5 is its built-in planning capability. Given a complex task (e.g., “audit the financial report and prepare a presentation”), the model autonomously breaks it down into stages, selects the necessary tools, verifies its own intermediate results, and corrects errors in the process.
Record Technical Proficiency: The model demonstrates outstanding success in software development. It handles planning and iterations in complex tasks much better, generating fewer vulnerabilities in every line of code.
Scientific Potential: GPT-5.5 is optimized for working with scientific hypotheses. It is capable of analyzing massive arrays of data, identifying patterns, and assisting in the search for new mathematical and physical proofs, effectively becoming a full-fledged assistant in R&D departments.
📊 Technical Specifications and Efficiency
| Feature | Metric | Note |
|---|---|---|
| ID | openai/gpt-5.5 | OpenAI GPT-5.5 |
| Release Date | April 23, 2026 | OpenAI’s latest release |
| Context Window | 1,000,000 tokens | ~750,000 words |
| Performance (Terminal-Bench 2.0) | 82.7% | +7.6% vs GPT-5.4 (75.1%) |
| Consumption Efficiency | 15% fewer tokens | When performing logical tasks |
| Processing Speed | Unchanged | Optimization through architecture |
| API Cost (GPT-5.5) | $5.00 input / $30.00 output | Per 1 million tokens (batch mode -50%) |
| API Cost (GPT-5.5 Pro) | $30.00 input / $180.00 output | Per 1 million tokens |
| Multimodality | Native audio, video, text | Real-time mode |
🚀 Practical Application Scenarios
For Developers
- Writing and debugging complex code with minimal human assistance
- Planning project architecture from start to finish
- Automatically identifying and patching vulnerabilities
For Analysts and Researchers
- Processing large volumes of data and identifying patterns
- Supporting hypotheses through scientific analysis
- Running experiments with mathematical proofs
For Project Managers
- Autonomous planning of workflows
- Preparation of comprehensive analytical reports
- Executing multi-step tasks without constant supervision
💰 Cost of Using GPT-5.5
The cost of using GPT-5.5 depends on exactly how you plan to work with it — via the API for development or through a regular ChatGPT subscription.
API Cost: For Developers
If you are a developer integrating GPT-5.5 into your applications or services, you are charged based on the number of tokens (conditional units of text) processed by the model. The entire API pricing structure is presented in the table:
| Version and Mode | Price per 1M Input Tokens | Price per 1M Output Tokens |
|---|---|---|
| GPT-5.5 (Standard) | $5.00 | $30.00 |
| GPT-5.5 Pro | $30.00 | $180.00 |
❗️ Important Nuances and Savings Modes
- Significant Price Increase: Compared to the previous GPT-5.4 model, the cost of the standard GPT-5.5 API has doubled (GPT-5.4 cost $2.50 / $15.00).
- Batch API: This mode allows you to get a 50% discount ($2.50 / $15.00) by processing requests in a queue with a response within 24 hours. This is ideal for non-urgent or background tasks.
- Long Requests: Processing very large requests (over 272,000 tokens) incurs a double charge for input and a 1.5x charge for output tokens.
- Regional Processing (Data Residency): Processing data in a specific region incurs a 10% surcharge on top of the standard cost.
- Pro Version: The price for the most powerful version, GPT-5.5 Pro, has not changed compared to GPT-5.4 Pro.
Cost for Users: ChatGPT Plans
For regular users, access to GPT-5.5 is available through various ChatGPT subscription plans:
- Plus Plan: This plan includes unlimited messages to the GPT-5.5 model and expanded access to its enhanced “thinking” version, GPT-5.5 Thinking.
- Pro, Business, Enterprise Plans: These plans provide access to the most powerful and accurate version — GPT-5.5 Pro.
Cost Summary: Yes, technically the price per token for GPT-5.5 has doubled. However, as OpenAI CEO Sam Altman noted, the model requires fewer tokens to solve the same tasks, which can significantly reduce actual costs in practice.
❓ Frequently Asked Questions
How is GPT-5.5 different from GPT-5.4?
GPT-5.5 offers built-in autonomous planning capabilities (Agentic Workflow), improved programming skills (+7.6% in Terminal-Bench 2.0), a 1M token context window (compared to a smaller one in 5.4), and 15% more efficient token consumption. The main difference is the transition from a text generator to a full-fledged digital agent.
How does autonomous planning work in GPT-5.5?
The model breaks down a complex task into stages, autonomously selects the necessary tools, verifies intermediate results, and corrects errors during execution. This allows it to solve multi-step tasks even with vague instructions.
How many tokens can GPT-5.5 process?
The context window of GPT-5.5 is 1,000,000 tokens, which is equivalent to about 750,000 words. This allows the model to work with very large volumes of text and remember context over long sessions.
Will GPT-5.5 be cheaper to use?
Nominally, the API token prices are twice as high as GPT-5.4 ($5.00 per 1M input / $30.00 per 1M output tokens). However, thanks to the optimized architecture, GPT-5.5 requires 15% fewer tokens to perform the same logical tasks, and a Batch API mode is available with a 50% discount, lowering real costs.
Can GPT-5.5 help in scientific research?
Yes, the model is optimized for working with scientific hypotheses. It can analyze data, identify patterns, assist in interpreting results, and even support the search for new mathematical proofs.
How to use GPT-5.5 in business?
GPT-5.5 can be used to: automate software development, conduct analytical research, plan projects, prepare reports, and execute complex multi-step operations. The main advantage is executing tasks with minimal human intervention.
Summary: GPT-5.5 is the transition from an AI that helps you WRITE, to an AI that helps you DO, performing the roles of a full-fledged analyst and developer. It is a harbinger of a new era where models act as reliable digital employees, rather than just tools for generating text.