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Home/Models & Labs
Models & Labs

OpenAI releases GPT-6 Sol and Luna with lower costs

TechCrunch AI·September 22, 2026·high confidence

Why it matters

  • →GPT-6 Sol and Luna offer a 50% price reduction compared to the 5.6 series, lowering costs for high-volume API usage.
  • →OpenAI claims factual accuracy improvements that bring smaller models closer to flagship reliability levels.
  • →The release directly competes with Anthropic's recent Opus update, signaling intensified competition in the coding and enterprise AI space.
OpenAI releases GPT-6 Sol and Luna with lower costs
©TechCrunch AI

OpenAI has released updated versions of its GPT-6 Sol and Luna models, positioning them as more efficient alternatives to its flagship Astra model. The company reports a 50% reduction in API costs compared to the previous generation, attributing this to improved caching and inference techniques. Additionally, OpenAI claims GPT-6 Sol has halved its factual error rate, achieving reliability levels closer to Astra while remaining suitable for coding and high-volume clerical tasks. These models are now available via the ChatGPT API and within ChatGPT Work and Codex for most paid accounts.

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