Supercompat
Docs
Supercorp
GitHub
94
Getting started
Installation
Comparison
Output SDKs
OpenAI
Anthropic
Adapters
Client
Storage
Run
Providers
OpenAI
Anthropic
Google
Azure
Mistral
Groq
Together
OpenRouter
Perplexity
Ollama
Tools
Function calling
Web search
File search
Code interpreter
Computer use
Streaming

Output SDKs

Supercompat returns a client that looks like one of two SDKs — whichever one your application already knows how to use. This is the output SDK.
OpenAI — import from supercompat/openai. You get an OpenAI instance with full TypeScript types. Exposes the Responses API (client.responses.create) and the Assistants API (client.beta.threads.*, client.beta.assistants.*).
Anthropic — import from supercompat/anthropic. You get an Anthropic instance. Exposes the Messages API (client.messages.create).
The backend provider is independent of the output SDK — that's decided by the client adapter. You can point an OpenAI-shaped client at Anthropic, Groq, or Gemini, and you can point an Anthropic-shaped client at OpenAI.

Pick one

OpenAI SDKResponses API and Assistants API from the OpenAI SDK, backed by any provider.
Anthropic SDKMessages API from the Anthropic SDK, backed by any provider.

Quick comparison

SurfaceImport pathEntry callStateful?
Responses APIsupercompat/openaiclient.responses.create()Optional (conversations)
Assistants APIsupercompat/openaiclient.beta.threads.runs.create()Yes (threads + runs)
Messages APIsupercompat/anthropicclient.messages.create()No
Most new code should use the Responses API. The Assistants API is there for existing applications built on OpenAI's threads/runs surface. The Messages API is for apps already structured around Anthropic.