Practical News: AI & Business News Anthropic Releases Opus 5.5, OpenAI Unveils New Models
Sep 22, 2026
Anthropic launches Opus 5.5 with stronger coding, safety, and frontier capabilities at a lower cost. OpenAI counters with GPT-6 Sol and Luna, specialized models designed for coding and clerical work. The discussion also explores increasingly confusing AI model names, the shift toward practical and affordable upgrades, and Meta’s Muse as a free alternative when premium access runs out.
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Smaller Models Drive The Next Price War
- Anthropic and OpenAI are making smaller models faster, cheaper, and more capable rather than releasing only frontier systems.
- Opus 5.5 cuts output pricing 20%, while OpenAI’s new models target half the API cost of its 5.6 series.
Opus 5.5 Cuts Costs After Two Months
- Opus 5.5 costs $20 per million output tokens, down from $25, and reportedly beats the larger Fable model on coding and knowledge tasks.
- Anthropic released it only two months after Opus 5, signaling an unusually rapid improvement cycle.
Model Naming Is Becoming A Product Problem
- Anthropic’s expanding lineup now includes Haiku, Sonnet, Opus, Fable, and restricted Mythos, making model selection increasingly confusing.
- OpenAI and Google appear to be converging on similarly tiered naming systems instead of maintaining simple model families.