OpenAI reports GPT-6 Luna at 66.6% on DeepSWE v1.1

GPT-6 Luna is the fast, low-cost tier. OpenAI reports that it scores 66.6% on DeepSWE v1.1, comparable to Claude Opus 5 and Fable 5 at medium effort for 93-96% less per task.

At higher effort, OpenAI reports that GPT-6 Luna matches GPT-5.6 Sol on factuality at about 1/100th the cost. It is available on OpenRouter.

#gpt-6-luna #openai #openrouter #deepswe #benchmarks

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