OpenAI API Pricing — GPT-4o, GPT-4.1, o3 & More
OpenAI offers a broad lineup of models ranging from the ultra-affordable GPT-4.1 Nano to the powerful o3 reasoning model. Their API supports batch processing at 50% off standard rates, prompt caching for reduced input costs, and vision/tool-use across most models.
All OpenAI Models
12 models · Prices in USD per 1M tokens
| Model | Tier | Input $/1M | Output $/1M |
|---|---|---|---|
| GPT-4.1 | Flagship | $2.00 | $8.00 |
| GPT-4.1 Mini | Mid-tier | $0.40 | $1.60 |
| GPT-4.1 Nano | Budget | $0.10 | $0.40 |
| GPT-4o | Flagship | $2.50 | $10.00 |
| GPT-4o Mini | Budget | $0.15 | $0.60 |
| o3 | Flagship | $2.00 | $8.00 |
| o3 Mini | Mid-tier | $1.10 | $4.40 |
| o4 Mini | Mid-tier | $1.10 | $4.40 |
| o1 | Flagship | $15.00 | $60.00 |
| GPT-5 | Flagship | $1.25 | $10.00 |
| GPT-5 Mini | Mid-tier | $0.25 | $2.00 |
| GPT-5 Nano | Budget | $0.05 | $0.40 |
About OpenAI's Model Lineup
OpenAI is the company behind the GPT series of large language models and the o-series reasoning models. Their API is one of the most widely adopted in the industry, powering applications from customer service chatbots to advanced code generation tools.
The GPT-4.1 family (GPT-4.1, 4.1 Mini, 4.1 Nano) launched in April 2025 and offers a 1M-token context window across all tiers, with Nano providing one of the cheapest flagship-quality options at just $0.10/$0.40 per million input/output tokens. GPT-4o remains a strong general-purpose option, while o3 and o4 Mini target complex reasoning tasks with extended thinking capabilities.
Batch processing is available across most models at 50% of standard rates, making it ideal for offline analysis, evaluations, and data processing pipelines. Prompt caching further reduces repeated input costs by up to 75%.
Disclosure: Pricing data on this page is sourced from OpenAI's official pricing page and was last verified on 2026-02-20. Prices are subject to change without notice. Some links on this site may be affiliate links. We may earn a commission at no additional cost to you. This does not influence our data or recommendations — all pricing is sourced directly from provider documentation.