GPT Terra

OpenAI · lightweight line

6 releases since 2023Latest: GPT-5.6 Terra

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 Terra

OpenAI · GPT Terra line · lightweight

Just releasedreleased 62 days ago — usual gap is ~197

The mid tier of the GPT-5.6 trio (Sol / Terra / Luna), positioned by OpenAI as the balanced everyday model: $2 per million input tokens and $12 per million output tokens after the 30 July price cut.

Released Jul 9, 2026 · what changed →

Days since last release

GPT-5.6 Terra · Jul 9, 2026

days

Usual gap

197

days

Recent gaps

GPT-5.6 Terra · Jul 2026

114

GPT-5.4 mini · Mar 2026

335

o4-mini · Apr 2025

o3-mini · Jan 2025

197

Every GPT Terra release

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

Jul

GPT-5.6 Terra OpenAI · GPT Terra

The mid tier of the GPT-5.6 trio (Sol / Terra / Luna), positioned by OpenAI as the balanced everyday model: $2 per million input tokens and $12 per million output tokens after the 30 July price cut.

Sources: OpenAI · Vellum

Mar

GPT-5.4 mini OpenAI · GPT Terra

Apr

o4-mini OpenAI · GPT Terra

Jan

o3-mini OpenAI · GPT Terra

Jul

GPT-4o mini OpenAI · GPT Terra

Mar

GPT-3.5 Turbo OpenAI · GPT Terra

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