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 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.
Benchmarks, with their conditions
- Terminal-Bench 4.0 at maximum reasoning effort: 50.3% of tasks solved, versus 21.5% for GPT-5.6 Terra.
- On an internal set of error-inducing prompts: a 16.7% error rate at low effort and 4.3% at maximum effort.
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
Top comments (0)