o1
Flagshipby OpenAI
OpenAI o1 is a reasoning-focused model that uses internal chain-of-thought to solve complex problems in math, science, and code. It trades speed for accuracy, producing some of the highest scores on MATH and GPQA benchmarks. OpenAI has scheduled the o1 API shutdown for October 23, 2026 and names GPT-5.6 Sol as the replacement.
Input Price
$15.00
per 1M tokens
Output Price
$60.00
per 1M tokens
Context Window
200K
tokens
Released
2024-12
API access
Capabilities
Key Strengths
- ✓Advanced chain-of-thought reasoning
- ✓Top math and science scores
- ✓200K context
- ✓Strong code generation
Best For
- ▸Scientific research
- ▸Complex math problems
- ▸Advanced code debugging
- ▸Logical reasoning tasks
Benchmark Scores
| Benchmark | Score | Description |
|---|---|---|
| SWE-bench | 48.9 | Real-world software engineering tasks from GitHub issues (SWE-bench Verified) |
| MMLU-Pro | 91.8 | General knowledge and reasoning across 57 subjects |
| HumanEval | 94.2 | Python code generation and problem solving |
| GPQA Diamond | 72.5 | Graduate-level science questions verified by domain experts |
| MATH | 94.6 | Competition-level mathematics problems |
Scores sourced from public benchmark datasets. See full benchmark leaderboard for all models.
Pricing Details
Input tokens
$15.00
per 1M tokens
Output tokens
$60.00
per 1M tokens
Estimated cost per 1K requests
$45.00
~1K input + ~500 output tokens avg
Prices are subject to change. Check the official documentation for current pricing. See the cost calculator for detailed estimates.
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