Introduction

Run open-weight models through OpenAI and Anthropic compatible inference endpoints.

Prism is an inference API for coding agents. Use the OpenAI client already in your application, change its base URL, and select a Prism model.

OpenAI base URL:   https://api.prisminference.com/v1
Anthropic base URL: https://api.prisminference.com

Prism serves GLM-5.3, Kimi K3, Qwen, and DeepSeek-V4-Flash. The same API key works with both supported wire formats.

API formats

Endpoint	Format	Purpose
POST /v1/chat/completions	OpenAI Chat Completions	Generate text, stream tokens, call tools, and return structured output.
GET /v1/models	OpenAI Models	List models available to the authenticated API key.
GET /v1/models/{model}	OpenAI Models	Retrieve one available model by ID.
POST /v1/messages	Anthropic Messages	Use Prism models with Anthropic clients and Claude Code.
POST /v1/messages/count_tokens	Anthropic token counting	Count input tokens before creating a message.

Prism V0 supports the inference endpoints listed above. Additional API formats may be added after the initial release.

OpenAI-compatible request

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.PRISM_API_KEY,
  baseURL: "https://api.prisminference.com/v1",
});

const response = await client.chat.completions.create({
  model: "prism-glm53",
  messages: [
    { role: "user", content: "Find the race condition in this worker: ..." },
  ],
});

console.log(response.choices[0].message.content);

Keep API keys on your server. Do not put them in browser code, client bundles, or public repositories.

Start building

Quickstart

Send a request with cURL, TypeScript, or Python.

Models

Compare model IDs, context windows, and intended workloads.

Chat Completions

Read the OpenAI-compatible request and response contract.

Anthropic Messages

Connect Anthropic SDKs and Claude Code.