GPT-6.1 Terra
OpenAI’s mid tier — half of Sol’s price with the full 1.05M context
Verdict
Added in October 2026 at $1/$5 per million tokens, with 1.05M context and 128K output. Use it for routes where GPT-6 Luna fails your evaluation and GPT-6.1 Sol costs more than the route needs. It accepts reasoning effort none, which brings back temperature and top_p on routes that depend on them.
Other Text Generation & Reasoning
- GPT-6 AstraProduction
OpenAI's most capable model — 1.05M context, 128K output
- GPT-6.1 SolProduction
The OpenAI default — near-Astra quality at a fifth of the price
- GPT-6 LunaProduction
OpenAI's efficient tier — $0.10/$0.50 with the full 1.05M context
- GPT-5.6Superseded
Previous OpenAI family — Sol/Terra/Luna tiers, superseded by GPT-6
- GPT-5Superseded
OpenAI's 2025 flagship — two families back now
- GPT-5 miniSuperseded
OpenAI's 2025 cost-efficient model — superseded by GPT-6 Luna