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GPT-4.5

OpenAI · GPT line · flagship

Released February 27, 2025Replaced by GPT-4.1

GPT-4.5 was released by OpenAI on February 27, 2025, as a flagship model in the GPT line.

  • Release 7 of 17 in the GPT line.
  • Came 168 days after o1, released Sep 12, 2024.
  • Replaced by GPT-4.1 on April 14, 2025, 46 days later.
  • These days the line ships a new model about every 75 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 line stands

GPT-6.1 Sol 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-6.1 Sol

OpenAI · GPT line · flagship
Just releasedreleased 5 days ago — usual gap is ~75

One week after GPT-6 Sol, it scores 7 points higher on computer-use tasks and 4 points higher on the all-round intelligence index at the same $2 / $10 price.

Released Sep 29, 2026 · what changed →
Days since last release
GPT-6.1 Sol · Sep 29, 2026
5
days
Usual gap
75
days
Recent gaps
GPT-6.1 Sol · Sep 2026
7
GPT-6 Sol · Sep 2026
75
GPT-5.6 Sol · Jul 2026
77
GPT-5.5 · Apr 2026
49

Every GPT release

Newest first. See the full line with every card →

  1. Sep 29, 2026GPT-6.1 Sol
  2. Sep 22, 2026GPT-6 Sol
  3. Jul 9, 2026GPT-5.6 Sol
  4. Apr 23, 2026GPT-5.5
  5. Mar 5, 2026GPT-5.4
  6. Dec 11, 2025GPT-5.2
  7. Nov 12, 2025GPT-5.1
  8. Aug 7, 2025GPT-5
  9. Apr 16, 2025o3
  10. Apr 14, 2025GPT-4.1
  11. Feb 27, 2025GPT-4.5 · this page
  12. Sep 12, 2024o1
  13. May 13, 2024GPT-4o
  14. Nov 6, 2023GPT-4 Turbo
  15. Mar 14, 2023GPT-4
  16. Nov 30, 2022GPT-3.5
  17. Jun 11, 2020GPT-3