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o1-mini

OpenAI · GPT Terra line · lightweight

Released September 12, 2024Replaced by o3-mini

o1-mini was released by OpenAI on September 12, 2024, as a lightweight model in the GPT Terra line.

  • Release 3 of 9 in the GPT Terra line.
  • Came 56 days after GPT-4o mini, released Jul 18, 2024.
  • Replaced by o3-mini on January 31, 2025, 141 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
  4. Apr 16, 2025o4-mini
  5. Apr 14, 2025GPT-4.1 mini
  6. Jan 31, 2025o3-mini
  7. Sep 12, 2024o1-mini · this page
  8. Jul 18, 2024GPT-4o mini
  9. Mar 1, 2023GPT-3.5 Turbo