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Overview

Concentrate provides access to 160+ models from 21 authors across 21 providers through a single unified API. Use any model slug below in the model field of your request.
You can also pin a specific provider using the provider/model format:
Pricing, context windows, and provider availability are kept current in the Model Fortress dashboard. You can also query the List Models endpoint for real-time data.

Models by Author

OpenAI (26 models)

Frontier

Codex (Agentic Coding)

Reasoning

Previous Generation

Open-Weight (GPT-OSS)

Providers

Models are available across 21 providers. The same model may be offered by multiple providers with different pricing, latency, and feature support.

Model Selection

There are three ways to specify which model to use: See Routing for full details on provider selection, fallback, and optimization metrics.

Querying Models Programmatically

Use the Models API to get real-time model data including current pricing and per-provider ZDR status:

List Models

Full API reference for querying models

Routing

How provider selection and fallback works

Zero Data Retention

ZDR-certified models and providers

Quickstart

Make your first API call