OpenAI API
GPT models, embeddings, images and speech by API
OpenAI API alternatives →More API tools →74 free dev tools →
OpenAI API provides access to GPT-6 series models, embeddings, image, speech and agent capabilities via a unified API.
- for
- Developers building AI-powered applications and agents
- pricing
- pay-as-you-go
Key features
- Frontier models — Access GPT-6 series with up to 1.05M context and 128K output tokens.
- Pay-as-you-go pricing — Input and output tokens billed per million (e.g., $0.10-$10 per 1M tokens).
- Agent SDK & Responses API — Create workflows, add voice with GPT-Live-1, and integrate tools like web and file search.
- Enterprise security — Zero data retention, SOC 2, HIPAA BAA, encryption at rest and in transit.
- Built-in tools for agents — Web search, file search, remote MCP servers, and voice capabilities.
Use cases
- Generate, review and refactor code automatically
- Provide real-time voice assistants with GPT-Live-1
- Deliver autonomous customer-support agents
- Create personalized recommendation engines
- Analyze complex data and produce research summaries
OpenAI API vs alternatives
| OpenAI API |  Replicate |  OpenRouter |  Postman |  WorkOS | |
|---|---|---|---|---|---|
| Best for | Unified AI model and agent APIs | Model hosting & fine-tuning | Multi-model marketplace | API development workflow | Authentication and SSO |
| Pricing | Pay-as-you-go | Subscription | Subscription | Subscription | Subscription |
| DevHunt upvotes | 0 | 0 | 0 | 0 | 0 |
| Launched | — | — | — | — | — |
- OpenAI API vs Replicate: Focuses on running and fine-tuning AI models rather than providing OpenAI’s frontier models
- OpenAI API vs OpenRouter: Aggregates many AI models from different providers, not limited to OpenAI’s own models
- OpenAI API vs Postman: API design, testing and documentation tool, not an AI model provider
- OpenAI API vs WorkOS: Provides enterprise SSO and auth APIs, unrelated to AI model access
OpenAI API FAQ
How is usage billed?+
Tokens are billed per million for input and output; rates vary by model (e.g., $0.10 input, $0.50 output for GPT-6 Luna).
Is my data used to train OpenAI models?+
By default no training on your data; a zero-retention policy is available on request.
What security certifications does the API have?+
OpenAI offers SOC 2 Type 2, HIPAA-compatible BAA, data encryption (AES-256 at rest, TLS 1.2+ in transit), and IP allowlist/mTLS controls.
Can I build voice agents with the API?+
Yes, GPT-Live-1 adds real-time voice input and output for agent experiences.
What support is available for enterprise customers?+
Dedicated account teams, prioritized support, and access to solutions architects for deployment guidance.
Summarized by DevHunt from openai.com · Nov 7, 2026. Details may change; check the official site.
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