<p>OpenAI has released GPT-6 Sol and GPT-6 Luna, 2 lower-cost models trained with methods similar to GPT-6 Astra. Sol costs $2/$10 and Luna $0.10/$0.50 per 1M tokens. Both are available now in the API, ChatGPT Work and Codex. They come with improved prompt caching for long-running agents.</p>
<p>The post <a href="https://www.marktechpost.com/2026/09/22/openai-releases-gpt-6-sol-and-luna-50-cheaper-api-pricing-and-benchmarks/">OpenAI Releases GPT-6 Sol and Luna: 50% Cheaper API Pricing and Benchmarks</a> appeared first on <a href="https://www.marktechpost.com">MarkTechPost</a>.</p>