OpenAI API
OpenAI's general developer API for text, agents, realtime voice, embeddings and more, billed usage-based per token.
Category: Development & Code · Agent & RAG frameworks
Features
The OpenAI API offers models for text, code, images and audio, plus tools for search, file analysis and agent workflows. Billing depends on the model and usage; tool and storage charges can be added. ChatGPT subscriptions and API billing are separate.
- Access to GPT-6 Astra, the GPT-5.6 family, o-models, Whisper, TTS, and embeddings through one REST API
- Customizable Agents SDK with precise handoff rules for multi-step AI agents
- Batch API for up to 50 percent price reduction on async runs
- Responses API with built-in web search, code interpreter, and file search
- Realtime API for low-latency audio in and out
- Example list price GPT-6 Astra: $10/$50 per 1M input/output tokens
Prices and plans
| Tier | Price | Period | What you get |
|---|---|---|---|
| OpenAI API | $10 / $50Standard up to 272,000 input tokens. Above that: USD 20 input and USD 75 output per million tokens for the entire request. Other processing tiers and extra tools can incur different costs. | per 1M input/output tokens | Access to GPT-6 Astra and the GPT-5.6 model family (Sol/Terra/Luna), Agents SDK, Responses API Realtime voice API, transcription, embeddings, tool calls GPT-Live-1: full-duplex voice API (listens and speaks at the same time) at $0.05 per minute, billed by the second; backend model and tools billed separately Agents API (public beta since September 10, 2026): OpenAI-hosted, managed Codex harness for durable cloud agents with sessions, context compaction, and up to 4 subagents; no separate harness fee, model tokens and tools billed at standard rates, optional hosted sandbox at container rates ($0.03/$0.12/$0.48/$1.92 for 1/4/16/64 GB per 20-minute session); US data residency only, no ZDR |
Limits
Standalone, usage-based price list on platform.openai.com, separate from ChatGPT subscription plans and from the already-listed OpenAI Image API and OpenAI Codex entries, which only cover narrow slices. Models, prices, and rate limits vary; full table on the official pricing page.
Similar tools
FAQ
Is OpenAI API available for free?
No. No free access is published on the vendor's own pages.
Where is OpenAI API's vendor based?
OpenAI, based in USA. For data processing and privacy terms the vendor's own contract governs.
Is OpenAI API still active?
Live-checked against the official vendor page.
How many plans are documented for OpenAI API?
The catalog documents 1 plans with price, billing period, and included features.
Which use case is OpenAI API categorized for?
OpenAI API is listed in the catalog under “Development & Code.”
Where do the details about OpenAI API come from?
Prices, limits, and product details are documented against the listed official vendor page.
How we compare
We compare free access, paid entry, plan limits, features and the listed official sources. Unsourced figures stay marked as not published.
Only confirmed entries appear in the catalog. Prices, plans and limits come from listed official vendor pages. Missing figures stay marked as not published. Result lists are alphabetical by default and can be switched to Free access first; neither is a quality ranking. The vendor page always wins.
Edited and checked by the AI Compare team
Sources
- https://openai.com/api/pricing/
- https://platform.openai.com/
- https://developers.openai.com/api/docs/models/gpt-6-astra
- https://developers.openai.com/api/docs/pricing
- https://openai.com/index/introducing-gpt-live-1-in-the-api/
- https://developers.openai.com/api/docs/guides/live
- https://openai.com/index/introducing-the-agents-api/
- https://developers.openai.com/api/docs/guides/agents-api/overview
- https://developers.openai.com/api/docs/guides/agents-api/quickstart
- https://developers.openai.com/api/docs/guides/agents
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