GPT-6.1 Terra: what the new pricing and benchmarks actually tell developers
OpenAI announced GPT-6.1 Terra on October 26, 2026. It's available in ChatGPT Work and Codex on paid plans, and through the API as gpt-6.1-terra . API pricing (standard rates) $1 per million input tokens $0.05 per million cached input tokens $5 per million output tokens That's 50% below GPT-5.6 Ter
Posted on Oct 28 • Originally published at tadna.com
OpenAI announced GPT-6.1 Terra on October 26, 2026. It's available in ChatGPT Work and Codex on paid plans, and through the API as gpt-6.1-terra.
That's 50% below GPT-5.6 Terra and GPT-6.1 Sol. Keep in mind this is a per-token price, so real savings depend on your token mix, especially how much of your input hits the cache.
These are results from specific tests under specific settings, not a general guarantee for every workload. If you run high-volume jobs, it's worth benchmarking Terra on your own tasks before switching.
Full breakdown on Tadna: OpenAI launches GPT-6.1 Terra