The main thing about the GPT-6.1 Terra: Bench is almost catching up with the 6.1 Sol, but now it's cheaper. The emphasis was on visual understanding, computer use and more natural text. Terminal-Bench 4.0 doubled Tara's speed. The model has become much more efficient in relation to the use of tokens. In ChatGPT work and Codex, the same tariff with the new model is enough for more tasks than with Tera GPT-5.6. In the agent's last check, at the average thinking level, the result is 15p.p. Higher than that of GPT-5.6 Terra, costing three times lower. It is at the level of GPT-6 Astra at a price for marking is 10 times less. Missions completed more than three times faster than Astra and Sol. According to OpenAI, at the maximum level of reasoning, Terra is three times more efficient than Cloud Opus 5.5 for tokens and four times cheaper in markup, totaling about 9 times cheaper per task. Available on all paid caps and APIs.