OpenAI announced GPT-6 Sol and GPT-6 Luna on September 22, 2026. The company says they build on GPT-6 Astra’s advances, bringing much of its strengths into faster, more affordable models for work at scale. It attributes API prices 50% below GPT-5.6 promotional pricing to efficiency improvements in caching and inference.
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OpenAI · Watch on XPlease welcome GPT-6 Sol and GPT-6 Luna to the GPT-6 universe.
GPT-6 Sol and Luna build on the advances behind GPT-6 Astra, bringing much of its strengths into faster and more affordable models to support work at scale.
We’ve also made caching and inference more efficient, and we’re passing the savings directly to you: 50% lower API prices for Sol and Luna compared with GPT‑5.6 promotional pricing.
OpenAI introduces GPT-6 Sol and GPT-6 Luna
OpenAI says API prices for both models are 50% lower than GPT-5.6 promotional pricing, crediting more efficient caching and inference.
OpenAI announced GPT-6 Sol and GPT-6 Luna on September 22, 2026. The company says they build on GPT-6 Astra’s advances, bringing much of its strengths into faster, more affordable models for work at scale. It attributes API prices 50% below GPT-5.6 promotional pricing to efficiency improvements in caching and inference.
Featured Source
OpenAI · Watch on XPlease welcome GPT-6 Sol and GPT-6 Luna to the GPT-6 universe.
GPT-6 Sol and Luna build on the advances behind GPT-6 Astra, bringing much of its strengths into faster and more affordable models to support work at scale.
We’ve also made caching and inference more efficient, and we’re passing the savings directly to you: 50% lower API prices for Sol and Luna compared with GPT‑5.6 promotional pricing.
AI