OpenAI
LLM
Medium
Closed weights
GPT-6.1 Terra
17 days since OpenAI announced it ·
GPT-6.1 Terra is a closed-weights LLM from OpenAI, announced 26 Oct 2026. It costs $1 per 1M input tokens and $5 per 1M output tokens. Its context window is 1.05M tokens.
- Input
- $1
- per 1M tokens
- Cache write
- $1.25
- per 1M tokens
- Cache read
- $0.05
- per 1M tokens
- Output
- $5
- per 1M tokens
- Context window
- 1.05M
- tokens
- Parameters
- —
- not disclosed
- Announcement
- openai.com/index/introducing-gpt-6-1-terra
- Docs
- developers.openai.com/api/docs/models/gpt-6.1-terra
- Our story
- Our story
Our coverage
1 storyOpenAI · Medium
closed weightsA new one every ~75 days — due in ~58d.
- GPT-6.1 Terra +27d
- GPT-6.1 Sol +7d
- GPT-6 Sol +75d
- GPT-5.6 Terra +0d
- GPT-5.6 Sol +114d
- GPT-5.4 mini +222d
- GPT-5 mini
More from OpenAI
All models- GPT-6 Cyber
- GPT-Image-2.6 Flare
- GPT-Image-2.6 Sunburst
- GPT-6 Rosalind
- GPT-6 Luna
- GPT Image 2.5 Flare
- GPT Image 2.5 Sunburst
- GPT-6 Astra
Tools that picked it up
- ChatGPT same day
- Codex 0.165.0 +1d
- OpenCode 2.2.0 +1d
- Copilot 1.0.106 +11d
Facts last updated , from OpenAI’s own pages.