OpenAI’s rapid expansion of its GPT-6 family drives current trader sentiment around the next Sol iteration (6.1+). On September 22, the company released GPT-6 Sol and Luna, priced 50% below GPT-5.6 equivalents thanks to caching and inference gains, while claiming halved factual error rates and stronger results on coding and agent benchmarks than Anthropic’s just-launched Claude Opus 5.5. These models extend advances from the earlier GPT-6 Astra flagship, positioning Sol as the scalable tier for complex professional workflows. The simultaneous timing underscores the OpenAI-Anthropic rivalry, with OpenAI emphasizing alignment improvements and broader API/ChatGPT Work availability. Upcoming catalysts include the gradual Chat rollout, potential further tier updates, and any regulatory scrutiny on frontier capabilities.