OpenAI introduced GPT-6 Sol and GPT-6 Luna. Anthropic unveiled Claude Opus 5. 5.
Source: [CNBC](https://www.cnbc.com/2026/09/22/anthropic-openai-cheaper-ai-models.html)
Anthropic published a post about their CI infrastructure that I keep coming back to. The headline number is that Claude writes 80% of their code. That's the part everyone quoted.
Why one model isn't enough When I started building an AI upscaling service, I thought I'd just wrap Real-ESRGAN and call it done. Wrong. A model trained on photographs produces blurry edges on digital art.
Learn how GPT-6 improves prompt caching with higher cache hit rates, new diagnostics, explicit breakpoints, and controls that reduce latency and costs.
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5 points, 5 comments on Hacker News
Anthropic and OpenAI are both launching new model updates today, with Claude Opus 5. 5 and GPT-6 Sol & Luna both being announced within roughly an hour of each other.