GPT-6.1 Sol
The OpenAI default — near-Astra quality at a fifth of the price
Verdict
Shipped September 29, 2026, one week after GPT-6 Sol, and replaced it at the same $2/$10 list price. OpenAI positions it as near-Astra on agentic coding, computer use, and professional work, with the same 1.05M-token context and 128K output. This is the sane OpenAI default for agentic and coding workloads — the role GPT-5.6 Terra held over the summer.
Other Text Generation & Reasoning
- GPT-6 AstraProduction
OpenAI's most capable model — 1.05M context, 128K output
- 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Previous OpenAI family — Sol/Terra/Luna tiers, superseded by GPT-6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OpenAI's 2025 cost-efficient model — superseded by GPT-6 Luna
- GPT-4oSuperseded
OpenAI 2024 multimodal model — legacy, with retirement dates on Azure