OpenAI · Released Dec 5, 2024o1
O-series reasoning model for hard analysis, math, coding, and planning.
- Capability
- 141.9ECI · #92 of 148
- Input
- $15.00per 1M tokens
- Output
- $60.00per 1M tokens
- Context
- 200K100K max output
What it costs
- Input
- $15.00per million tokens
- Output
- $60.00per million tokens
- Cached input
- $7.50per million tokens
- Blended (3:1)
- $26.25pricier than 97% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $60.00 |
| Team assistant25M input + 5M output tokens | $675.00 |
| Production app250M input + 50M output tokens | $6,750 |
Official OpenAI API price, as listed on models.dev.
Independent benchmarks
#92 of 148 scored models
The shaded band is Epoch AI’s confidence range (139.7–143.1); the tick marks the median scored model.
Scores from Epoch AI, run independently of OpenAI.
The details
- Lab
- OpenAI
- Released
- Dec 5, 2024
- Knowledge cutoff
- Sep 2023
- Context window
- 200,000 tokens
- Max output
- 100,000 tokens
- Inputs
- Text, Images, PDFs
- Output
- Text
- Reasoning
- Adjustable effort low · medium · high
- Tool calling
- Yes
- Structured output
- Yes
- Weights
- Proprietary
- API model ID
o1on OpenAI- Availability
- 9 API providerslisted on models.dev
- Status
- Deprecated by the provider
What OpenAI claims
Published by the lab at launch. Settings vary, so compare these only with care.
| Benchmark | Score | Setting | Source |
|---|---|---|---|
| Aider Polyglot | 61.7 percent correct | — | Source |
More from OpenAI
About o1
How much does o1 cost?
o1 costs $15.00 input / $60.00 output per million tokens (official OpenAI API price). Cached input is $7.50 per million tokens. At a 3:1 input-to-output mix that is $26.25 per million tokens, more expensive than 97% of the 360 priced models we track.
What is the context window of o1?
o1 accepts up to 200,000 tokens per request and can write up to 100,000 tokens in one response.
How good is o1?
Epoch AI gives o1 a Capabilities Index score of 141.9 (likely range 139.7–143.1), ranking it #92 of 148 models Epoch has scored. Epoch AI benchmark results: GPQA Diamond 76.8%, FrontierMath Tiers 1–3 14.7%, OTIS Mock AIME 2024–2025 73.3%, SimpleQA Verified 41.1%.
Is o1 open source?
No. o1 is proprietary; you use it through OpenAI’s API or partner platforms.
What inputs does o1 support?
o1 accepts text, images and PDFs and replies in text. It is a reasoning model with low, medium and high effort settings, supports tool calling and can return structured JSON output.
When was o1 released?
OpenAI released o1 on Dec 5, 2024. Its training data runs to Sep 2023.
What are the best alternatives to o1?
The closest current models from other labs on capability, price and release date are Claude Opus 4 (Anthropic, ECI 142.7, $15.00 / $75.00), DeepSeek-R1-Distill-Qwen-32B (DeepSeek, ECI 137.4), Gemini 2.0 Flash (Google, ECI 134.7) and Qwen3 Max (Alibaba (Qwen), ECI 142.4, $1.20 / $6.00).