OpenAI
APIs and tools for building AI products
5.0•735 reviews•13K followers
APIs and tools for building AI products
5.0•735 reviews•13K followers
The most powerful platform for building AI products.
Build and scale AI experiences powered by industry-leading models and tools.
This is the 37th launch from OpenAI. View more
GPT-5.5 by OpenAI
Launching today
GPT-5.5 is OpenAI’s most advanced model yet, designed to handle real-world work with greater autonomy, speed, and efficiency. It excels at coding, research, data analysis, and task execution — planning, using tools, and iterating with minimal guidance — making it a powerful partner for complex, multi-step workflows.
Free Options
Launch Team
Gemini 2.5 Pro
GPT-5.5 feels like a real shift toward agentic AI 🤯
It introduces a new class of agentic AI designed to execute complex, multi-step tasks autonomously instead of just assisting. It solves the core limitation of LLMs: needing constant human steering for real work.
What makes it different?
Agentic workflow execution (plan → tool use → verify → iterate)
Maintains long context across systems & tasks
Higher intelligence without latency tradeoff* (matches GPT-5.4 speed)
More token-efficient → better outputs at lower compute cost
Stronger autonomy in ambiguous, real-world scenarios
Key technical capabilities
State-of-the-art coding performance (Terminal-Bench: 82.7%)
Advanced tool usage & computer operation (OSWorld: 78.7%)
Long-context reasoning up to 1M tokens (API)
End-to-end SWE task solving (SWE-Bench Pro: 58.6%)
Knowledge work benchmarks (GDPval: 84.9%)
High-performance agent workflows (Tau2 Telecom: 98%)
Features
Agentic coding (debugging, refactoring, testing, validation)
Autonomous research & analysis loops
Spreadsheet + document generation
Cross-tool navigation (browser, software, APIs)
Scientific reasoning & multi-step data analysis
Built-in safety systems + cyber safeguards
Availability
Available in @ChatGPT by OpenAI (Plus, Pro, Business, Enterprise)
Integrated deeply into Codex (CLI, IDEs, web, app) for agentic coding workflows
API access (Responses & Chat Completions) coming soon with up to 1M context
Benefits
Ship features faster (hours instead of days)
Reduce debugging & iteration cycles
Automate complex workflows end-to-end
Higher quality outputs with fewer retries
Who it’s for & use cases: Developers, data scientists, researchers, startups, and enterprises for building full-stack apps, debugging large codebases, automating workflows, financial modeling, and advanced research analysis.
This isn’t just a better model, it’s a shift toward AI that can actually operate like a teammate across ChatGPT and Codex.