› GPT-6.1 Terra costs half as much as Gemini 4 Argon through the API: $1 / $5 versus $2 / $10 per million tokens.
› But Argon ranks higher on the independent Artificial Analysis index, with 52.6 points to Terra’s 48.1.
› I tested both models on October 26, 2026, using 12 tasks in Polish, office tasks from OpenAI’s announcement, technical drawings from a scan and a photograph, screenshot-based form filling, and 20 questions about Polish regulations.
› Terra either won or tied in every category, while Argon failed to finish its answer twice.At a glance (test run October 26, 2026)API price: Terra $1 / $5, Argon $2 / $10 per million tokens.Artificial Analysis: Argon scored 52.6 points ($1.62 per index task); Terra scored 48.1 ($0.40).12 tasks in Polish: Terra scored 65/72 for $0.064; Argon scored 64/72 for $0.128.Office tasks: Terra scored 50/51, Argon 47/51.