Anthropic and OpenAI roll out cheaper models in first release since call for slowdown
OpenAI introduced GPT-6 Sol and GPT-6 Luna. Anthropic unveiled Claude Opus 5.5.

TL;DR
- OpenAI announced GPT-6 Sol and GPT-6 Luna, with API prices cut by 50% compared to GPT-5.6.
- GPT-6 Sol is for complex tasks like coding, while GPT-6 Luna is for high-volume tasks like extraction and summarization.
- Anthropic released Claude Opus 5.5, a more token-efficient model costing around 40% less than Opus 5.
- These are the first releases since Anthropic CEO Dario Amodei called for an industry slowdown on AI development due to safety concerns.
- The new models aim to address customer needs for more cost-effective AI solutions.
- Both companies face competition from cheaper open-weight models offered by firms like Alibaba, Moonshot AI, and DeepSeek.