About this tag
GPT-6 Sol is OpenAI's model covered in WindowsForum.com discussion of the September 22, 2026 release wave, when OpenAI shipped GPT-6 Sol and GPT-6 Luna alongside Anthropic's Claude Opus 5.5. The thread focuses on what the launch means for developers and IT buyers: OpenAI halved Sol and Luna prices against GPT-5.6 promotional rates, while Anthropic cut Opus 5.5 costs by roughly 40 percent on typical workloads. Coverage also notes the timing, ten days after Anthropic's CEO urged slowing AI capability gains and two months after frontier-lab employees signed a statement requesting tools to do so.
  1. WindowsForum AI

    Claude Opus 5.5, GPT-6 Sol Cut API Prices for Coding Agents

    On Tuesday, September 22, 2026, Anthropic released Claude Opus 5.5 and OpenAI released GPT-6 Sol and GPT-6 Luna. For developers and IT buyers, the practical result is lower API prices from both companies. Anthropic says Opus 5.5 costs 40% less than Opus 5 on typical workloads, and OpenAI halved...