Create your API key
Sign up and grab an API key from the PiAPI workspace — free credits are included on sign-up.
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Top up credits
Add credits on the billing page when you are ready to scale beyond the free tier.
Call the API
POST your first task following the API docs, then poll the task until the result is ready.
Iterate with the API
Use the API docs and the request example above to iterate on prompts and settings before wiring them into your product.
Frequently asked questions
Is GPT-5.5 API available on PiAPI?
GPT-5.5 API access through PiAPI is coming soon. OpenAI has published GPT-5.5 model and pricing details, but PiAPI-specific endpoint names, request examples, usage pricing, and production availability will be updated when integration details are finalized.
Is GPT-5.5 available through the OpenAI API?
OpenAI has published GPT-5.5 API and model details in its own documentation. This PiAPI page tracks GPT-5.5 access through PiAPI's unified API platform, not direct OpenAI API account access.
What is the difference between OpenAI API access and PiAPI GPT-5.5 access?
OpenAI API access is direct access through OpenAI's platform. PiAPI GPT-5.5 access would provide GPT-5.5 through PiAPI's own account workflow, pricing system, documentation, and unified API platform once support launches.
How much does GPT-5.5 API cost?
OpenAI has published GPT-5.5 pricing in its own API documentation. PiAPI-specific GPT-5.5 pricing is not confirmed yet and will be updated when access through PiAPI is finalized.
When will GPT-5.5 API access be available on PiAPI?
PiAPI has not published a confirmed GPT-5.5 API launch date yet. Join PiAPI or check this page for updates on model availability, request format, pricing, and documentation.
Is GPT-5.5 related to Codex?
GPT-5.5 is relevant for Codex-style coding workflows. Codex is OpenAI's coding agent, while GPT-5.5 is a model used for coding, reasoning, tool-heavy work, and agentic development tasks.
Is there a Codex API?
The phrase Codex API is ambiguous. Developers often use it to mean coding-agent workflows, model access for code generation, Codex tooling, or API-based automation around software engineering tasks.
Can GPT-5.5 be used for coding agents?
GPT-5.5 is positioned for coding, reasoning, tool-heavy, and agentic workflows. PiAPI will update this page when GPT-5.5 access for PiAPI developer workflows is available.
Can GPT-5.5 support structured JSON outputs?
GPT-5.5 is a strong fit for structured-output and strict prompt-following workflows. PiAPI-specific implementation details for GPT-5.5 structured outputs will be confirmed when support launches.
What AI APIs can I use on PiAPI while waiting for GPT-5.5?
While GPT-5.5 access through PiAPI is coming soon, developers can review PiAPI's current LLM options, including DeepSeek API, GPT-4o API, and Claude API workflows for chat, reasoning, coding, and assistant use cases.
More questions? See the API docs.
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GPT-5.5 API
