Models & Labs
OpenAI Releases GPT-6.1 Sol After Cancelling Astra
Lev Selectorhigh confidence
Why it matters
- →Clarifies OpenAI's current flagship model lineup
- →Removes uncertainty around the cancelled Astra variant
- →Signals continued rapid iteration in frontier models
OpenAI has officially released GPT-6.1 Sol, replacing the previously announced but cancelled GPT-6.1 Astra model. The release marks a strategic pivot in OpenAI's naming and versioning strategy for its latest frontier capabilities. This update provides developers with immediate access to the current state-of-the-art reasoning model without the confusion of the withdrawn variant.
Read originalThe story around this
Earlier coverage that leads up to this article, and what followed. Lines connect each piece to the closest one after it, converging here.
How we got here
- 1OpenAI Previews GPT-5.6 Sol
Matt Wolfe · July 3, 2026 · Same story
- 2OpenAI Releases GPT-5.6 Models: Sol, Terra, Luna
Lev Selector · July 3, 2026 · Same story
- 3OpenAI Releases GPT 5.6 Sol
AI Explained · July 10, 2026 · Same story
- 4OpenAI Unveils GPT-6 Astra Model
OpenAI · September 3, 2026 · Same story
- 5OpenAI Releases GPT-6 Astra with New Safety Paper
AI Explained · September 4, 2026 · Same story
- 6OpenAI Unveils GPT-6 Astra
Matt Wolfe · September 4, 2026 · Same story
- 7OpenAI releases GPT-6 Sol and Luna with lower costs
TechCrunch AI · September 22, 2026 · Same story
- 8OpenAI releases GPT-6.1 Sol, cuts costs while boosting safety
TechCrunch AI · September 29, 2026 · Same story
Follow this story
Open the full story →OpenAI Halts GPT-6.1 Astra Release Over Safety Failures
3 developments
- Sep 29 · WIRED AI
OpenAI Halts GPT-6.1 Astra Release Over Safety Failures - Oct 1 · AI Explained
OpenAI Shelves GPT-6.1 Astra After Safety Failures - Oct 2 · Lev Selector
OpenAI Releases GPT-6.1 Sol After Cancelling Astra (This article)
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