GPT-5.5
GPT-5.5 is OpenAI's most advanced model, optimized for agentic coding, computer use and complex reasoning while keeping the latency of GPT-5.4.
OpenAI · ChatGPT
GPT-5.5
OpenAI's flagship frontier model
GPT-5.5 is OpenAI's most advanced model, optimized for agentic coding, computer use and complex reasoning while keeping the latency of GPT-5.4.
Key features
GPT-5.5 · AI Models
Context window
256K tokens
Max output
128K tokens
Released
April 2026
Pricing
Standard ChatGPT API tier
Key features
- Top frontier intelligence with higher token efficiency than GPT-5.4.
- State-of-the-art agentic coding and computer-use capabilities.
- Improved scientific and knowledge-work performance.
- Drop-in replacement for GPT-5.4 with the same latency profile.
Best for
Use GPT-5.5 when you need the highest-quality OpenAI model for agentic coding, multi-step research, or any workload where reasoning depth matters more than cost.
Frequently Asked Questions
Is GPT-5.5 better than GPT-5.4?
Yes — GPT-5.5 delivers higher intelligence and better agentic-coding performance while matching GPT-5.4's latency and improving token efficiency.
Is GPT-5.5 free to try?
You can chat with GPT-5.5 here on AIChat without registration. OpenAI also offers GPT-5.5 via ChatGPT Plus, Team, Enterprise plans and the API.
When was GPT-5.5 released?
GPT-5.5 was released by OpenAI in April 2026 as the successor to GPT-5.4.
Open Chat
GPT-5.5 is OpenAI's most advanced model, optimized for agentic coding, computer use and complex reasoning while keeping the latency of GPT-5.4.