o1-preview
OpenAI
OpenAI's first reasoning-focused model that uses extended chain-of-thought processing to tackle complex problems. Spends more time thinking before responding, breaking down problems systematically. Achieves exceptional performance on PhD-level science questions (GPQA) and competitive programming (Codeforces 89th percentile). Best for tasks requiring deep reasoning: mathematics, scientific analysis, coding challenges, and multi-step problem decomposition.
Strengths
- Exceptional reasoning capabilities - 89th percentile on Codeforces competitive programming
- PhD-level science performance: 78% on GPQA benchmark (vs 56% for GPT-4o)
- Chain-of-thought processing produces detailed explanations and step-by-step solutions
- Strong at mathematics, scientific reasoning, and complex coding challenges
- 32K max output tokens enables detailed explanations and long-form reasoning
Caveats
- Higher cost per token than GPT-4o ($15 vs $2.50 input, $60 vs $10 output)
- Slower response times due to thinking process (not suitable for real-time applications)
- No vision, tool use, or file upload support initially (text-only)
- Overkill for simple tasks - use GPT-4o for general queries
- 128K context window smaller than GPT-4o and GPT-5 series
- Vendor
- OpenAI
- Context Window
- 128,000 tokens
- Max Output
- 32,768 tokens
- License
- Proprietary
- Release Date
- 2024-09-12
- Modalities
- text
| Benchmark | Score | Max |
|---|---|---|
| GPQA Diamond | 78.0 | - |
| Codeforces | 89.0 | - |
| livebench_coding | 61.6 | 100.0 |
| livebench_instruction_following | 85.2 | 100.0 |
| livebench_language | 70.7 | 100.0 |
Capabilities
Vision
Audio
Video
Tool Use
Resources
Pricing
$15.00 per 1M input tokens, $60.00 per 1M output tokens