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GPT-5.6 Sol

OpenAI · GPT line · flagship

Released July 9, 2026Replaced by GPT-6 Sol

GPT-5.6 Sol was released by OpenAI on July 9, 2026, as a flagship model in the GPT line.

  • Release 15 of 17 in the GPT line.
  • Came 77 days after GPT-5.5, released Apr 23, 2026.
  • Replaced by GPT-6 Sol on September 22, 2026, 75 days later.
  • These days the line ships a new model about every 75 days.

What changed

The most capable of the three GPT-5.6 models (Sol, Terra and Luna), priced at $5 per million input tokens and $30 per million output tokens.

Sources: OpenAI · CNBC

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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

OpenAI · flagship line

Latest: GPT-6.1 Sol · Sep 29, 2026

Just released25 days since the last release · usual gap 75 days

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.

What changed in GPT-6.1 Sol →
Days since last release
25
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 · this page
  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
  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. Nov 18, 2021GPT-3