GPT-6 Luna (Low)

GPT-6 Luna (Low) at a glance

OpenAI released GPT-6 Luna (Low) on September 22, 2026.

GPT-6 Luna (Low) scores 9.7 on the Intelligence Index, the overall score the AI Benchmark rankings sort models by. This score comes from independent third-party model evaluations, which Franklin AI syncs automatically each day.

It costs $0.10 per million input tokens and $0.50 per million output tokens, so a sample workload of 1 million input tokens and 200,000 output tokens costs about $0.20. It writes about 115 output tokens per second, so a 500-token answer takes roughly 4.4 seconds once output starts, after a wait of about 2.58 seconds for the first token.

The benchmark data has no Coding Index, Math Index or individual benchmark results for GPT-6 Luna (Low) yet.

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