LaunchAI ModelsSeptember 30, 2026

Anthropic and OpenAI ship cheaper mid-tier models in same week

Read original source →lastweekin.ai

Anthropic's Claude Opus 5.5 runs 40% cheaper than Opus 5 and re-routes cybersecurity requests to the weaker Opus 4.8; Sonnet 5.5 is 30% faster than Sonnet 5 and beats Opus 5.5 on agentic coding. OpenAI released GPT-6 Sol and Luna 90 minutes after Opus 5.5.

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