The preview GPT-4 model with improved instruction following, JSON mode, reproducible outputs, parallel function calling, and more. Training data: up to Dec 2023.
Note: heavily rate limited by OpenAI while in preview.
OpenAI: GPT-4 Turbo Preview – Provider Status and Pricing | OpenRouter
Providers for GPT-4 Turbo Preview
OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.