OpenAI slashes GPT 5.6 prices: Luna cheaper than DeepSeek V4 Pro

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Alex Getman @alexgetmancom · 30 Jul 2026, 17:51 UTC · Updated 31 Oct 2026, 20:59 UTC

Prices & limits

⚡️ OpenAI just slashed GPT 5.6 prices

Luna is now 80% cheaper, while Terra dropped 20%. The cuts also apply to subscriptions, with both models now using less of your quota.

Luna is now cheaper than DeepSeek V4 Pro on input. One million tokens cost $0.20 vs $0.435.

Chart titled Artificial Analysis Intelligence Index v4.1 shows GPT-5.6 Luna achieving the highest intelligence score at the lowest cost per task, outperforming DeepSeek V4 Pro, Gemini, and Claude models in price-to-performance ratio.

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Analysis

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