o1 is OpenAI's original reasoning model, the first to demonstrate chain-of-thought capabilities at scale. While newer models like o3 have surpassed it, o1 remains a solid choice for reasoning tasks at a lower cost point.
Key Features
Pioneer chain-of-thought reasoning model
Strong analytical capabilities
Proven reliability across diverse reasoning tasks
128K token context window
Ideal Use Cases
Mathematical problem solving
Logical analysis and deduction
Coding challenges requiring reasoning
Educational step-by-step explanations
Technical Specifications
| Context Window | 128K tokens |
| Modality | Text → Text |
| Provider | OpenAI |
| Category | Reasoning |
| Max Output | 32K tokens |
| Status | Production stable |
API Usage
1 curl -X POST https://api.vincony.com/v1/chat/completions \ 2 -H "Authorization: Bearer YOUR_API_KEY" \ 3 -H "Content-Type: application/json" \ 4 -d '{ 5 "model": "openai/o1", 6 "messages": [ 7 { "role": "user", "content": "Hello, o1!" } 8 ] 9 }'
Replace YOUR_API_KEY with your Vincony API key. OpenAI-compatible endpoint — works with any OpenAI SDK.
Compare with Another Model
Frequently Asked Questions
Try o1 now
Start using o1 instantly — 100 free credits, no credit card required. Access 343+ AI models through one platform.
More from OpenAI
Use ← → to navigate between models · Esc to go back
GPT-5.2
OpenAI's latest flagship with superior language understanding and generation.
GPT-5.2 Pro
Extended context and enhanced accuracy for professional workloads.
GPT-5.2 Chat
Optimized for multi-turn conversational interactions.
GPT-5.2 Codex
Top-tier code generation and software engineering assistant.