OpenAI launches GPT-6.1 Terra with 50% price cut, underperforms Anthropic models in independent tests

OpenAI released GPT-6.1 Terra on October 26, reducing input token price to $1 and output token price to $5, half the cost of its predecessor GPT-5.6 Terra. Independent tester Artificial Analysis scored Terra 48 on its Intelligence Index, ranking it below Anthropic's Claude Opus 5.5 (58 points) and Claude Sonnet 5.5 (56 points). Despite the lower score, OpenAI emphasizes Terra's cost efficiency, stating it costs about 9 times less per task than Opus 5.5 on Agents' Last Exam, and positions the model for high-volume tasks like invoice processing.