GPT Luna

OpenAI · lightweight line

2 releases since 2026Latest: GPT-5.6 Luna

Where the line stands

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

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.

Released Jul 9, 2026 · what changed →

Days since last release

GPT-5.6 Luna · Jul 9, 2026

days

Usual gap

114

days

Recent gaps

GPT-5.6 Luna · Jul 2026

114

Every GPT Luna release

Newest first — what each version changed versus the one before, in OpenAI's own numbers.

Jul

GPT-5.6 Luna OpenAI · GPT Luna

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

Mar

GPT-5.4 nano OpenAI · GPT Luna

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