GPT-6.1 Terra costs $1 in / $5 out per 1M tokens. Kimi K3.1 Pro is $2 / $10. Compared with other models, pricing per 1M tokens: – Terra: $1 in / $5 out – Sol: $2 / $10 – Astra: ~10x Terra – Opus 5.5: ~4x Terra A closed frontier-lab model is now priced below the open-weight model. It’s not the best on the benchmarks. OpenAI says so itself. But most of our work doesn’t need the smartest model. Used well, Terra gets you close to frontier results.