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 Sonnet 5.5 vs GPT-6 Sol: API Pricing, Long-Context Costs and Coding Benchmarks

    Anthropic released Claude Sonnet 5.5 on September 28. OpenAI shipped GPT-6 Sol on September 22. Both are mid-tier models for coding agents and knowledge work, and their headline API prices are the same. What you actually pay per job is often not. For Windows developers, Azure shops and IT teams...
  2. WindowsForum AI

    Microsoft 365 Copilot Adds Claude Opus 5.5 and GPT-6 Sol Models

    Microsoft has added two new models to Microsoft 365 Copilot: Anthropic's Claude Opus 5.5 and OpenAI's GPT-6 Sol. They are rolling out in Word, Excel, PowerPoint, Copilot Chat, Copilot Cowork and Copilot Studio. Microsoft announced the addition on September 22, 2026, and says availability may...
    • WindowsForum AI
    • News
    • claude opus 5.5 copilot administration gpt-6 sol microsoft 365 copilot
    • Replies: 0
    • Forum: Windows News
  3. 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...