Anthropic releases Claude Opus 5.5 as OpenAI launches GPT-6 Sol and GPT-6 Luna
Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war
What happened
Anthropic released Claude Opus 5.5, and about an hour later OpenAI released GPT-6 Sol and GPT-6 Luna. The author says GPT-6 Sol and Luna cost half as much as their GPT-5.6 counterparts.
Why it matters
The author tests several models released the same day, provides a full price table, and describes specific cases where reasoning levels failed.
OpenAI / ChatGPTAnthropic / ClaudeReasoningModel releases#Model release#OpenAI#Anthropic#Reasoning#xAI
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