OpenAI: GPT-6.1 Terra Pro

GPT-6.1 Terra Pro is a paid OpenAI model that accepts text, image, and file inputs. Its context window of 1,050,000 tokens can hold very long documents, large codebases, or extended conversation histories in a single request, and responses can run up to 128,000 tokens. It supports tool calling and reasoning, which makes it a candidate for agentic workflows and multi-step tasks. The available facts do not confirm structured output support, so verify that before relying on it for strict schema responses. At $1.00 per million input tokens and $5.00 per million output tokens, the model suits teams that send large amounts of context, since input costs one fifth as much as output. Long-document analysis, retrieval-heavy pipelines, and multimodal file processing are natural fits. It has no independent benchmark coverage yet, so its quality relative to alternatives is unproven; shortlist it for testing on your own workloads rather than choosing it on reputation.