Reported Facts
OpenAI launched GPT-6.1 Terra with a specific focus on agent work, notably halving the API price previously established by GPT-6.1 Sol, as reported on October 26, 2026.
Analysis
*Note: No hands-on testing was conducted.*
Based strictly on the available evidence, the primary distinction highlighted in the release is economic rather than architectural. By reducing the API price by half for agent workloads, GPT-6.1 Terra addresses the cost barriers often associated with multi-step autonomous agent operations. Because detailed capability benchmarks comparing Terra and Sol directly were not provided in the source material, performance evaluations remain outside the scope of current evidence.