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
6 models · Prices in USD per 1M tokens
| Model | Tier | Input $/1M | Output $/1M |
|---|---|---|---|
| GPT-5.4 | Flagship | $2.50 | $15.00 |
| GPT-5.4 Mini | Mid-tier | $0.75 | $4.50 |
| GPT-5.4 Nano | Budget | $0.20 | $1.25 |
| GPT-5.4 Pro | Flagship | $30.00 | $180.00 |
| GPT-5.3 Chat | Flagship | $1.75 | $14.00 |
| GPT-5.3 Codex | Flagship | $1.75 | $14.00 |
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 2026-04-25. Prices are subject to change without notice. Always confirm current pricing on the provider's website.