o1
by OpenAIo-series family
Parameters
—
Context window
200K tokens
Released
2024-12-05
Input price / 1M tok
$15.00
Output price / 1M tok
$60.00
Modality
multimodal, vision
About o1
OpenAI's first reasoning-tuned model — spends more compute per query on chain-of-thought. Superseded by o3/GPT-5 but still available and useful for math, science, and hard code problems where you want a distinct 'thinking' pass.
Strengths
- Deep chain-of-thought
- Better than 4o on math/science
- Long context
Weaknesses
- No tools/functions
- Slow (10-60s latency)
- Superseded on most tasks by GPT-5
Best for
ResearchMathHard debugging