Tutorials, deep dives and product notes — built for developers.
GPT-6.1 Terra vs Claude Sonnet 5.5: Terra is ahead at low and medium effort, then Sonnet pulls 7.9 points ahead at max while costing 19× more per task ($7.60 vs $0.40). Full effort-ladder comparison, vendor and independent benchmarks, hallucination rates, and a routing guide.
GPT-6.1 Sol vs GPT-6.1 Terra: Terra costs half as much per token and 1.8× to 2.6× less per Artificial Analysis task at matched effort, while Sol scores 3.7 to 6.5 points higher. Effort-by-effort cost and score comparison, vendor and independent benchmarks, accuracy trade-offs, and a routing guide.