OpenAI API pricing

OpenAI API has 3 plans, with base fees from $0 to $0 a month. Prices were checked against OpenAI API's pricing page on 23 October 2026.

Category: AI API. Source: https://openai.com/api/pricing/.

Plans

Plan	Base fee	Includes
GPT-6 Luna	$0/mo	Commercial use allowed, HIPAA / BAA available, GDPR data processing agreement, Text generation (LLM API), Image input (vision)
GPT-6.1 Sol	$0/mo	Commercial use allowed, HIPAA / BAA available, GDPR data processing agreement, Text generation (LLM API), Image input (vision)
GPT-6 Astra	$0/mo	Commercial use allowed, HIPAA / BAA available, GDPR data processing agreement, Text generation (LLM API), Image input (vision)

OpenAI API cost as you grow

Monthly cost for a typical B2B SaaS app, from the cost engine.

Users	Plan	Monthly cost
1,000 users	GPT-6 Luna	$0/mo
10,000 users	GPT-6 Luna	$0/mo
50,000 users	GPT-6 Luna	$0/mo
100,000 users	GPT-6 Luna	$0/mo

Lock-in

Low to medium: the API is simple to swap, but prompts, tool definitions and output quality need re-testing on another model.

Set up OpenAI API

Packages: openai. Environment variables: OPENAI_API_KEY. Quickstart.

Everything OpenAI API sells

Product	Free tier	Lowest paid price
GPT-6 Luna	—	$0.10 per 1M input tokens, $0.50 per 1M output
GPT-6.1 Sol	—	$2.00 per 1M input tokens, $10.00 per 1M output
GPT-6 Astra	—	$10.00 per 1M input tokens, $50.00 per 1M output
GPT-Image-2.5	—	Image output $30.00 per 1M tokens; image input $8.00 per 1M
OpenAI voice (GPT-Live-1, GPT-Realtime-2.1, GPT-Transcribe)	—	GPT-Transcribe $0.0045/min; GPT-Live-1 $0.05/min
OpenAI web search tool	—	$10.00 per 1K calls

Startups built with OpenAI API

Inbox Zero: An open-source AI assistant for your email
Jan: An open-source ChatGPT alternative that runs offline
Papermark: Share documents and data rooms, with page-by-page analytics
Plane: Open-source project management: work items, cycles and wiki
Rallly: Group scheduling polls without the back-and-forth
Twenty: The open-source CRM, an alternative to Salesforce

Alternatives to OpenAI API

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OpenAI API pricing

Plans

OpenAI API cost as you grow

Lock-in

Set up OpenAI API

Everything OpenAI API sells

Startups built with OpenAI API

Alternatives to OpenAI API

What do I use to build this?And how much will it cost?What do you want to build?

What Are You Building?

Prices read from each vendor’s own pricing page

One placefor every stack decision.

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Cost as you grow

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Questions

Pick what works.Build what’s next.

What do I use to build this?
And how much will it cost?What do you want to build?

One place
for every stack decision.

Give your AI assistant
access to Kong Reviews.

See what real products
are built on.

Already built?
Start from what you run.

Pick what works.
Build what’s next.

Pick what works.
Build what’s next.