GPT-5.6 Luna vs Claude Opus 5: $0.20 vs $5, and a 11-Point Gap
On raw capability, GPT-5.6 Luna API and Claude Opus 5 are both max-config reasoning models with a million-token context window — 52.32 against 63.05 on Artificial Analysis’ Intelligence Index — but on price they are different species: $0.20 per million input tokens after OpenAI’s cut versus $5 (Anthropic’s list), a 25× gap, and $0.05 versus … Read more