GPT-5.6 Luna Price Cut by 80%, First-Party Synergy Boosts Performance

dfinke · x · 2026-08-01

OpenAI has slashed the price of GPT-5.6 Luna by 80%, making it the cheapest model in GitHub Copilot, costing roughly $0.20 per million input tokens and $1.20 per million output tokens.

The author notes that the model also runs better inside OpenAI's own Codex app, highlighting the synergistic advantages and cost benefits when the model and the software are developed by the same company.

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