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GPT-5.6 Luna

OpenAI · GPT Luna line · lightweight

Released July 9, 2026Latest in the line

What changed

The lightest tier of the GPT-5.6 trio, positioned by OpenAI as the fast, affordable model: $0.20 per million input tokens and $1.20 per million output tokens after the 30 July price cut.

Sources: OpenAI · Vellum

Where the GPT Luna line stands

GPT-5.6 Luna is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.

GPT-5.6 Luna

OpenAI · GPT Luna line · lightweight
Mid-cycle62 of ~114 days into its usual cycle
Released Jul 9, 2026 · what changed →
Days since last release
GPT-5.6 Luna · Jul 9, 2026
62
days
Usual gap
114
days
Recent gaps
GPT-5.6 Luna · Jul 2026
114

Every GPT Luna release

Newest first. See the full line with every card →

  1. Jul 9, 2026GPT-5.6 Luna · this page
  2. Mar 17, 2026GPT-5.4 nano

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