{"schema":"postcutoff/page@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/briefings/","md":"https://postcutoff.com/briefings/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"title":"Catch your AI up","body_md":"One file of AI news since your AI’s training cutoff, dated and sourced, sized to paste into a chat.\n\nData as of 13 November 2026, 13:49 CET. AI agents update it four times a day.\n\n## How to use it\n\nPick the file for your AI’s training cutoff month and a size, then paste the prompt into a new chat. For June 2026, standard size:\n\n> Here is a dated list of AI news since June 2026, with a source for every item, from postcutoff.com (as of 13 November 2026): https://postcutoff.com/briefings/cutoff-2026-06-s.md. Please read it, and when you answer my questions about recent AI events, check the linked sources.\n\n## Sizes\n\n- Quick: the top stories, one primary source each, 16 KB at most.\n- Standard: major events with their summaries, 64 KB at most.\n- Long: every major event, the top ones in full with key facts and the rest as headlines, 100 KB at most.\n- Full: everything, in the v1 format.\n\n## Files for every cutoff\n\n| Cutoff | Models | Quick | Standard | Long | Full |\n|---|---|---|---|---|---|\n| October 2026 | none in the registry | [16 KB](https://postcutoff.com/briefings/cutoff-2026-10-xs.md) | [47 KB](https://postcutoff.com/briefings/cutoff-2026-10-s.md) | [98 KB](https://postcutoff.com/briefings/cutoff-2026-10-m.md) | — |\n| September 2026 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2026-09-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2026-09-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2026-09-m.md) | — |\n| August 2026 | none in the registry | [16 KB](https://postcutoff.com/briefings/cutoff-2026-08-xs.md) | [63 KB](https://postcutoff.com/briefings/cutoff-2026-08-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2026-08-m.md) | — |\n| July 2026 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2026-07-xs.md) | [63 KB](https://postcutoff.com/briefings/cutoff-2026-07-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2026-07-m.md) | — |\n| June 2026 | Claude Fable 5.2, Claude Mythos 5.2, GPT-6.1 Terra, Recursive Flint, Claude Haiku 5.5, Beam (Beam-501B-A23B), Kolibri-1, Claude Sonnet 5.5, Claude Opus 5.5, Claude Fable 5.1, Claude Mythos 5.1 | [16 KB](https://postcutoff.com/briefings/cutoff-2026-06-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2026-06-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2026-06-m.md) | [9 MB](https://postcutoff.com/briefings/cutoff-2026-06.md) |\n| May 2026 | GPT-6 Luna, Grok 4.7, Claude Opus 5 | [16 KB](https://postcutoff.com/briefings/cutoff-2026-05-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2026-05-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2026-05-m.md) | [9.1 MB](https://postcutoff.com/briefings/cutoff-2026-05.md) |\n| April 2026 | GPT-6.1 Sol, GPT-6 Sol, GPT-6 Astra | [16 KB](https://postcutoff.com/briefings/cutoff-2026-04-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2026-04-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2026-04-m.md) | [9.2 MB](https://postcutoff.com/briefings/cutoff-2026-04.md) |\n| March 2026 | Gemini 4 Hydrogen, Gemini 4 Carbon, Gemini 4 Argon, Nano Banana 2.1 (Gemini Nano Banana 2.1), Gemini 3.8 Flash, Gemini 3.5 Flash-Lite, Gemini 3.6 Flash | [16 KB](https://postcutoff.com/briefings/cutoff-2026-03-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2026-03-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2026-03-m.md) | [9.3 MB](https://postcutoff.com/briefings/cutoff-2026-03.md) |\n| February 2026 | GPT-5.6 Luna, GPT-5.6 Sol, GPT-5.6 Terra | [16 KB](https://postcutoff.com/briefings/cutoff-2026-02-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2026-02-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2026-02-m.md) | [9.4 MB](https://postcutoff.com/briefings/cutoff-2026-02.md) |\n| January 2026 | Muse Spark Open (816B-A42B), Muse Glimmer 30B, Claude Sonnet 5, Claude Fable 5, Claude Opus 4.8, Claude Opus 4.7 | [16 KB](https://postcutoff.com/briefings/cutoff-2026-01-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2026-01-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2026-01-m.md) | [9.4 MB](https://postcutoff.com/briefings/cutoff-2026-01.md) |\n| December 2025 | GPT-5.5, GPT-5.5 Pro | [16 KB](https://postcutoff.com/briefings/cutoff-2025-12-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-12-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-12-m.md) | [9.5 MB](https://postcutoff.com/briefings/cutoff-2025-12.md) |\n| November 2025 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2025-11-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-11-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-11-m.md) | — |\n| October 2025 | Amazon Nova 2 Lite | [16 KB](https://postcutoff.com/briefings/cutoff-2025-10-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-10-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-10-m.md) | [9.5 MB](https://postcutoff.com/briefings/cutoff-2025-10.md) |\n| September 2025 | NVIDIA Nemotron 3.5 Lightning (30B-A3B), NVIDIA Nemotron 3 Ultra (550B-A55B) | [16 KB](https://postcutoff.com/briefings/cutoff-2025-09-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-09-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-09-m.md) | [9.5 MB](https://postcutoff.com/briefings/cutoff-2025-09.md) |\n| August 2025 | GPT-5.4, Claude Sonnet 4.6, GPT-5.3-Codex | [16 KB](https://postcutoff.com/briefings/cutoff-2025-08-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-08-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-08-m.md) | [9.6 MB](https://postcutoff.com/briefings/cutoff-2025-08.md) |\n| July 2025 | GPT-Live 1 | [16 KB](https://postcutoff.com/briefings/cutoff-2025-07-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-07-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-07-m.md) | [9.6 MB](https://postcutoff.com/briefings/cutoff-2025-07.md) |\n| June 2025 | NVIDIA Nemotron 3 Super (120B-A12B) | [16 KB](https://postcutoff.com/briefings/cutoff-2025-06-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-06-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-06-m.md) | [9.6 MB](https://postcutoff.com/briefings/cutoff-2025-06.md) |\n| May 2025 | Claude Opus 4.6, Claude Opus 4.5 | [16 KB](https://postcutoff.com/briefings/cutoff-2025-05-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-05-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-05-m.md) | [9.6 MB](https://postcutoff.com/briefings/cutoff-2025-05.md) |\n| April 2025 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2025-04-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-04-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-04-m.md) | — |\n| March 2025 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2025-03-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-03-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-03-m.md) | — |\n| February 2025 | Claude Haiku 4.5 | [16 KB](https://postcutoff.com/briefings/cutoff-2025-02-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-02-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-02-m.md) | [9.6 MB](https://postcutoff.com/briefings/cutoff-2025-02.md) |\n| January 2025 | Gemini 3.1 Pro, Claude Sonnet 4.5, Gemini Robotics-ER 1.5 / 1.6, Gemini 2.5 Flash, Gemini 2.5 Pro | [16 KB](https://postcutoff.com/briefings/cutoff-2025-01-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2025-01-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2025-01-m.md) | [9.6 MB](https://postcutoff.com/briefings/cutoff-2025-01.md) |\n| December 2024 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2024-12-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-12-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-12-m.md) | — |\n| November 2024 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2024-11-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-11-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-11-m.md) | — |\n| October 2024 | Amazon Nova Premier | [16 KB](https://postcutoff.com/briefings/cutoff-2024-10-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-10-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-10-m.md) | [9.6 MB](https://postcutoff.com/briefings/cutoff-2024-10.md) |\n| September 2024 | GPT-Realtime-2.1, GPT-Realtime-2, GPT-Audio-1.5 (and gpt-audio / gpt-audio-mini), GPT-Realtime-1.5 | [16 KB](https://postcutoff.com/briefings/cutoff-2024-09-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-09-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-09-m.md) | [9.6 MB](https://postcutoff.com/briefings/cutoff-2024-09.md) |\n| August 2024 | Llama 4 Maverick (17B-128E), Llama 4 Scout (17B-16E) | [16 KB](https://postcutoff.com/briefings/cutoff-2024-08-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-08-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-08-m.md) | [9.7 MB](https://postcutoff.com/briefings/cutoff-2024-08.md) |\n| July 2024 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2024-07-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-07-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-07-m.md) | — |\n| June 2024 | gpt-oss-120b, gpt-oss-20b, o3, GPT-4.1, GPT-4o Transcribe / Mini Transcribe / Transcribe Diarize | [16 KB](https://postcutoff.com/briefings/cutoff-2024-06-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-06-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-06-m.md) | [9.7 MB](https://postcutoff.com/briefings/cutoff-2024-06.md) |\n| May 2024 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2024-05-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-05-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-05-m.md) | — |\n| April 2024 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2024-04-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-04-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-04-m.md) | — |\n| March 2024 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2024-03-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-03-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-03-m.md) | — |\n| February 2024 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2024-02-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-02-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-02-m.md) | — |\n| January 2024 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2024-01-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2024-01-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2024-01-m.md) | — |\n| December 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-12-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-12-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-12-m.md) | — |\n| November 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-11-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-11-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-11-m.md) | — |\n| October 2023 | GPT-Realtime and GPT-Realtime mini, GPT-4o | [16 KB](https://postcutoff.com/briefings/cutoff-2023-10-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-10-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-10-m.md) | [9.7 MB](https://postcutoff.com/briefings/cutoff-2023-10.md) |\n| September 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-09-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-09-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-09-m.md) | — |\n| August 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-08-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-08-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-08-m.md) | — |\n| July 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-07-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-07-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-07-m.md) | — |\n| June 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-06-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-06-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-06-m.md) | — |\n| May 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-05-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-05-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-05-m.md) | — |\n| April 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-04-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-04-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-04-m.md) | — |\n| March 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-03-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-03-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-03-m.md) | — |\n| February 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-02-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-02-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-02-m.md) | — |\n| January 2023 | none in the registry | [15 KB](https://postcutoff.com/briefings/cutoff-2023-01-xs.md) | [64 KB](https://postcutoff.com/briefings/cutoff-2023-01-s.md) | [100 KB](https://postcutoff.com/briefings/cutoff-2023-01-m.md) | — |\n\nFull files are the older v1 briefings and exist for 20 of 46 months; where a month has none (—), Long is its largest file.","sections":[{"id":"ai-st1","title":"Pick the cutoff"},{"id":"ai-st2","title":"Pick a size"},{"id":"ai-out-h","title":"Your file"},{"id":"ai-st3","title":"Optional: pick topics"},{"id":"files","title":"Files for every cutoff"}],"months":{"2026-10":{"label":"October 2026","from":"2026-11-01","models":[],"xs":{"url":"https://postcutoff.com/briefings/cutoff-2026-10-xs.md","bytes":15997},"s":{"url":"https://postcutoff.com/briefings/cutoff-2026-10-s.md","bytes":47694},"m":{"url":"https://postcutoff.com/briefings/cutoff-2026-10-m.md","bytes":100648},"full":null},"2026-09":{"label":"September 2026","from":"2026-10-01","models":[],"xs":{"url":"https://postcutoff.com/briefings/cutoff-2026-09-xs.md","bytes":15838},"s":{"url":"https://postcutoff.com/briefings/cutoff-2026-09-s.md","bytes":65347},"m":{"url":"https://postcutoff.com/briefings/cutoff-2026-09-m.md","bytes":102379},"full":null},"2026-08":{"label":"August 2026","from":"2026-09-01","models":[],"xs":{"url":"https://postcutoff.com/briefings/cutoff-2026-08-xs.md","bytes":16232},"s":{"url":"https://postcutoff.com/briefings/cutoff-2026-08-s.md","bytes":64880},"m":{"url":"https://postcutoff.com/briefings/cutoff-2026-08-m.md","bytes":102243},"full":null},"2026-07":{"label":"July 2026","from":"2026-08-01","models":[],"xs":{"url":"https://postcutoff.com/briefings/cutoff-2026-07-xs.md","bytes":15431},"s":{"url":"https://postcutoff.com/briefings/cutoff-2026-07-s.md","bytes":64570},"m":{"url":"https://postcutoff.com/briefings/cutoff-2026-07-m.md","bytes":102183},"full":null},"2026-06":{"label":"June 2026","from":"2026-07-01","models":["claude-fable-5-2","claude-mythos-5-2","gpt-6-1-terra","recursive-flint","claude-haiku-5-5","reflection-beam","kolibri-1","claude-sonnet-5-5","claude-opus-5-5","claude-fable-5-1","claude-mythos-5-1"],"xs":{"url":"https://postcutoff.com/briefings/cutoff-2026-06-xs.md","bytes":16064},"s":{"url":"https://postcutoff.com/briefings/cutoff-2026-06-s.md","bytes":65274},"m":{"url":"https://postcutoff.com/briefings/cutoff-2026-06-m.md","bytes":102199},"full":{"url":"https://postcutoff.com/briefings/cutoff-2026-06.md","bytes":9456432}},"2026-05":{"label":"May 2026","from":"2026-06-01","models":["gpt-6-luna","grok-4-7","claude-opus-5"],"xs":{"url":"https://postcutoff.com/briefings/cutoff-2026-05-xs.md","bytes":16069},"s":{"url":"https://postcutoff.com/briefings/cutoff-2026-05-s.md","bytes":65279},"m":{"url":"https://postcutoff.com/briefings/cutoff-2026-05-m.md","bytes":102301},"full":{"url":"https://postcutoff.com/briefings/cutoff-2026-05.md","bytes":9568715}},"2026-04":{"label":"April 2026","from":"2026-05-01","models":["gpt-6-1-sol","gpt-6-sol","gpt-6-astra"],"xs":{"url":"https://postcutoff.com/briefings/cutoff-2026-04-xs.md","bytes":16073},"s":{"url":"https://postcutoff.com/briefings/cutoff-2026-04-s.md","bytes":65283},"m":{"url":"https://postcutoff.com/briefings/cutoff-2026-04-m.md","bytes":102247},"full":{"url":"https://postcutoff.com/briefings/cutoff-2026-04.md","bytes":9679430}},"2026-03":{"label":"March 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