This model offers four times the context length of gpt-3.5-turbo, allowing it to support approximately 20 pages of text in a single request at a higher cost. Training data: up to Sep 2021.
OpenAI: GPT-3.5 Turbo 16k – Provider Status | OpenRouter
Providers for GPT-3.5 Turbo 16k
OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.