What just changed?

October 2026

1. 11 Oct 20265 days ago

   GPT-6 Luna in Langdock: limited availability — recorded, start date not documented

   RecordRecord-keeping: a model’s identity was documented, or a source check found a state in place. The date is when it was recorded, not when something happened.

   Show the entries (1)

   1. 11 Oct 2026
      Availability

      GPT-6 LunainLangdockWorknew→Limited availability
      1docs.langdock.com›

      • docs.langdock.com/en/using-langdock/models-and-limits/fair-usage-policy.mdSource document · fetched 11 Oct 2026
2. 7 Oct 20269 days ago

   Correction of an earlier entry

   CorrectionOpenAI

   2developers.openai.com›

   • developers.openai.com/api/docs/deprecationsSource document · fetched 29 Sept 2026
   • developers.openai.com/api/docs/models/all.mdSource document · fetched 7 Oct 2026
3. 7 Oct 20269 days ago

   Correction of an earlier entry

   CorrectionOpenAI

   2developers.openai.com›

   • developers.openai.com/api/docs/deprecationsSource document · fetched 29 Sept 2026
   • developers.openai.com/api/docs/models/all.mdSource document · fetched 7 Oct 2026
4. 7 Oct 20269 days ago

   5 models documented in the record

   RecordRecord-keeping: a model’s identity was documented, or a source check found a state in place. The date is when it was recorded, not when something happened.

   Show the entries (5)

   1. 7 Oct 2026
      Model identity documented

      GPT-RosalindOpenAInew→Identity documented · release unknown
      1developers.openai.com›

      • developers.openai.com/api/docs/models/all.mdSource document · fetched 7 Oct 2026
   2. 7 Oct 2026
      Model identity documented

      o4-miniOpenAInew→Identity documented · release unknown
      1developers.openai.com›

      • developers.openai.com/api/docs/deprecations.mdSource document · fetched 7 Oct 2026
   3. 7 Oct 2026
      Model identity documented

      o3-miniOpenAInew→Identity documented · release unknown
      1developers.openai.com›

      • developers.openai.com/api/docs/deprecations.mdSource document · fetched 7 Oct 2026
   4. 7 Oct 2026
      Model identity documented

      GPT-5.4-CyberOpenAInew→Identity documented · release unknown
      1developers.openai.com›

      • developers.openai.com/api/docs/deprecations.mdSource document · fetched 7 Oct 2026
   5. 7 Oct 2026
      Model identity documented

      GPT-5.2-CodexOpenAInew→Identity documented · release unknown
      1developers.openai.com›

      • developers.openai.com/api/docs/deprecations.mdSource document · fetched 7 Oct 2026
5. 6 Oct 202610 days ago

   Correction of an earlier entry

   CorrectionOpenAI

   1help.openai.com›

   • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
6. 6 Oct 202610 days ago

   Correction of an earlier entry

   CorrectionOpenAI

   1help.openai.com›

   • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
7. 6 Oct 202610 days ago

   Correction of an earlier entry

   CorrectionOpenAI

   2learn.chatgpt.com›

   • learn.chatgpt.com/docs/changelogSource document · fetched 29 Sept 2026
   • learn.chatgpt.com/docs/models.mdSource document · fetched 4 Oct 2026
8. 6 Oct 202610 days ago

   Correction of an earlier entry

   CorrectionOpenAI

   2learn.chatgpt.com›

   • learn.chatgpt.com/docs/changelogSource document · fetched 29 Sept 2026
   • learn.chatgpt.com/docs/models.mdSource document · fetched 4 Oct 2026
9. 6 Oct 202610 days ago

   Correction of an earlier entry

   CorrectionOpenAI

   2learn.chatgpt.com›

   • learn.chatgpt.com/docs/changelogSource document · fetched 29 Sept 2026
   • learn.chatgpt.com/docs/models.mdSource document · fetched 4 Oct 2026
10. 6 Oct 202610 days ago

    Correction of an earlier entry

    CorrectionOpenAI

    2learn.chatgpt.com›

    • learn.chatgpt.com/docs/changelogSource document · fetched 29 Sept 2026
    • learn.chatgpt.com/docs/models.mdSource document · fetched 4 Oct 2026
11. 5 Oct 202611 days ago

    Correction of an earlier entry

    CorrectionOpenAI

    2help.openai.com+1›

    • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 3 Oct 2026
    • learn.chatgpt.com/docs/models.mdSource document · fetched 4 Oct 2026
12. 5 Oct 202611 days ago

    Correction of an earlier entry

    CorrectionOpenAI

    2help.openai.com+1›

    • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 3 Oct 2026
    • learn.chatgpt.com/docs/models.mdSource document · fetched 4 Oct 2026
13. 4 Oct 202612 days ago

    44 record-keeping entries: identities and states found in place

    RecordRecord-keeping: a model’s identity was documented, or a source check found a state in place. The date is when it was recorded, not when something happened.

    Show the entries (44)

    1. 4 Oct 2026
       Availability

       GPT-6 AstrainCodexCodex · Pronew→Limited availability
       1help.openai.com›

       • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    2. 4 Oct 2026
       Availability

       GPT-6 AstrainCodexCodex · Plusnew→Limited availability
       1help.openai.com›

       • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    3. 4 Oct 2026
       Availability

       GPT-5.6 TerrainCodexCodex · Pronew→Limited availability
       1help.openai.com›

       • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    4. 4 Oct 2026
       Availability

       GPT-5.6 TerrainCodexCodex · Plusnew→Limited availability
       1help.openai.com›

       • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    5. 4 Oct 2026
       Availability

       GPT-5.6 TerrainCodexCodex · Gonew→Limited availability
       1help.openai.com›

       • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    6. 4 Oct 2026
       Availability

       GPT-5.6 TerrainCodexCodex · Freenew→Limited availability
       1help.openai.com›

       • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    7. 4 Oct 2026
       Availability

       GPT-5.6 TerrainCodexCodex · Enterprisenew→Limited availability
       1help.openai.com›

       • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    8. 4 Oct 2026
       Availability

       GPT-5.6 TerrainCodexCodex · Businessnew→Limited availability
       1help.openai.com›

       • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    9. 4 Oct 2026
       Availability

       GPT-5.6 SolinCodexCodex · Pronew→Limited availability
       1help.openai.com›

       • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    10. 4 Oct 2026
        Availability

        GPT-5.6 SolinCodexCodex · Plusnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    11. 4 Oct 2026
        Availability

        GPT-5.6 SolinCodexCodex · Enterprisenew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    12. 4 Oct 2026
        Availability

        GPT-5.6 SolinCodexCodex · Businessnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    13. 4 Oct 2026
        Availability

        GPT-5.6 LunainCodexCodex · Pronew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    14. 4 Oct 2026
        Availability

        GPT-5.6 LunainCodexCodex · Plusnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    15. 4 Oct 2026
        Availability

        GPT-5.6 LunainCodexCodex · Enterprisenew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    16. 4 Oct 2026
        Availability

        GPT-5.6 LunainCodexCodex · Businessnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    17. 4 Oct 2026
        Availability

        GPT-6 AstrainChatGPT WorkWork · Pronew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    18. 4 Oct 2026
        Availability

        GPT-6 AstrainChatGPT WorkWork · Plusnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    19. 4 Oct 2026
        Availability

        GPT-5.6 TerrainChatGPT WorkWork · Pronew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    20. 4 Oct 2026
        Availability

        GPT-5.6 TerrainChatGPT WorkWork · Plusnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    21. 4 Oct 2026
        Availability

        GPT-5.6 TerrainChatGPT WorkWork · Enterprisenew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    22. 4 Oct 2026
        Availability

        GPT-5.6 TerrainChatGPT WorkWork · Businessnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    23. 4 Oct 2026
        Availability

        GPT-5.6 SolinChatGPT WorkWork · Pronew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    24. 4 Oct 2026
        Availability

        GPT-5.6 SolinChatGPT WorkWork · Plusnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    25. 4 Oct 2026
        Availability

        GPT-5.6 SolinChatGPT WorkWork · Enterprisenew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    26. 4 Oct 2026
        Availability

        GPT-5.6 SolinChatGPT WorkWork · Businessnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    27. 4 Oct 2026
        Availability

        GPT-5.6 LunainChatGPT WorkWork · Pronew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    28. 4 Oct 2026
        Availability

        GPT-5.6 LunainChatGPT WorkWork · Plusnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    29. 4 Oct 2026
        Availability

        GPT-5.6 LunainChatGPT WorkWork · Enterprisenew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    30. 4 Oct 2026
        Availability

        GPT-5.6 LunainChatGPT WorkWork · Businessnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    31. 4 Oct 2026
        Availability

        GPT-6 AstrainChatGPTApp · Pro 200new→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    32. 4 Oct 2026
        Availability

        GPT-6 AstrainChatGPTApp · Pro 100new→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    33. 4 Oct 2026
        Availability

        GPT-6 AstrainChatGPTApp · Businessnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    34. 4 Oct 2026
        Availability

        GPT-5.6 SolinChatGPTApp · Pronew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    35. 4 Oct 2026
        Availability

        GPT-5.6 SolinChatGPTApp · Plusnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    36. 4 Oct 2026
        Availability

        GPT-5.6 SolinChatGPTApp · Enterprisenew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    37. 4 Oct 2026
        Availability

        GPT-5.6 SolinChatGPTApp · Businessnew→Limited availability
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    38. 4 Oct 2026
        Availability

        GPT-5.6 LunainChatGPTApp (default model) · Gonew→Rolling out
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    39. 4 Oct 2026
        Availability

        GPT-5.6 LunainChatGPTApp (default model) · Freenew→Rolling out
        1help.openai.com›

        • help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgptSource document · fetched 4 Oct 2026
    40. 4 Oct 2026
        Availability

        GPT-6 AstrainCodexCodex · Enterprisenew→Limited availability
        1learn.chatgpt.com›

        • learn.chatgpt.com/docs/enterprise/workspace-model-availability.mdSource document · fetched 4 Oct 2026
    41. 4 Oct 2026
        Availability

        GPT-6 AstrainCodexCodex · Edunew→Limited availability
        1learn.chatgpt.com›

        • learn.chatgpt.com/docs/enterprise/workspace-model-availability.mdSource document · fetched 4 Oct 2026
    42. 4 Oct 2026
        Availability

        GPT-6 AstrainChatGPT WorkWork · Enterprisenew→Limited availability
        1learn.chatgpt.com›

        • learn.chatgpt.com/docs/enterprise/workspace-model-availability.mdSource document · fetched 4 Oct 2026
    43. 4 Oct 2026
        Availability

        GPT-6 AstrainChatGPT WorkWork · Edunew→Limited availability
        1learn.chatgpt.com›

        • learn.chatgpt.com/docs/enterprise/workspace-model-availability.mdSource document · fetched 4 Oct 2026
    44. 4 Oct 2026
        Availability

        GPT-6 AstrainChatGPTApp · Enterprisenew→Limited availability
        1learn.chatgpt.com›

        • learn.chatgpt.com/docs/enterprise/workspace-model-availability.mdSource document · fetched 4 Oct 2026