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GPT-5 mini

OpenAI · GPT Terra line · lightweight

Released August 7, 2025Replaced by GPT-5.4 mini

GPT-5 mini was released by OpenAI on August 7, 2025, as a lightweight model in the GPT Terra line.

  • Release 7 of 9 in the GPT Terra line.
  • Came 113 days after o4-mini, released Apr 16, 2025.
  • Replaced by GPT-5.4 mini on March 17, 2026, 222 days later.
  • These days the line ships a new model about every 114 days.

No detailed card for this model: we only add numbers published by the maker or by independent benchmarks. Sources: OpenAI

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Where the GPT Terra line stands

GPT-5.6 Terra 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 Terra

OpenAI · GPT Terra line · lightweight
Mid-cycle87 of ~114 days into its usual cycle

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
87
days
Usual gap
114
days
Recent gaps
GPT-5.6 Terra · Jul 2026
114
GPT-5.4 mini · Mar 2026
222
GPT-5 mini · Aug 2025
113
o4-mini · Apr 2025
75

Every GPT Terra release

Newest first. See the full line with every card →

  1. Jul 9, 2026GPT-5.6 Terra
  2. Mar 17, 2026GPT-5.4 mini
  3. Aug 7, 2025GPT-5 mini · this page
  4. Apr 16, 2025o4-mini
  5. Apr 14, 2025GPT-4.1 mini
  6. Jan 31, 2025o3-mini
  7. Sep 12, 2024o1-mini
  8. Jul 18, 2024GPT-4o mini
  9. Mar 1, 2023GPT-3.5 Turbo