30 September 2026
Anthropic and OpenAI cut AI model prices, launch new versions
First reported
Last Week in AI ran this on .
- Anthropic released Claude Opus 5.5 with 40% lower costs and improved cybersecurity safeguards, plus a faster Sonnet 5.5 variant.
- OpenAI released GPT-6 Sol and Luna models at half the cost of previous versions, followed by GPT-6.1 Sol at one-fifth prior token prices.
- Both companies prioritized cost reduction and safety as primary features of their new releases.
How it was covered
Last Week in AIAndrey Kurenkov
Anthropic launched Claude Opus 5.5 with 40% lower costs and stricter cybersecurity safeguards, plus Sonnet 5.5 with 30% faster speeds. OpenAI released GPT-6 Sol and Luna variants at half the API cost of prior versions, and later showed GPT-6.1 Sol matching Astra performance at one-fifth token prices. Both companies emphasised cost reduction and safety improvements as main selling points.