› GPT-6.1 Terra is available through the OpenAI API as gpt-6.1-terra and on OpenRouter as openai/gpt-6.1-terra.
› Below is Python and JavaScript code I ran on October 26, 2026, to extract invoice data into a fixed JSON schema and generate a short email text.
› I also measured three OpenAI modes on OpenRouter.
› In my test, processing one invoice cost $0.00097 in Standard mode and $0.00049 with Flex, which was also faster in that run.At a glance (as of October 26, 2026)Model names: gpt-6.1-terra (OpenAI), openai/gpt-6.1-terra (OpenRouter).OpenAI endpoints: Responses, Chat Completions and Batch.