{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2019-07-22-microsoft-invests-openai/","md":"https://postcutoff.com/e/2019-07-22-microsoft-invests-openai/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2019-07-22-microsoft-invests-openai","date":"2019-07-22","date_precision":"day","short_title":"Microsoft invests $1 billion in OpenAI","deck":null,"takeaway":"Microsoft invested $1B in OpenAI and became its exclusive cloud provider, months after OpenAI created a 'capped-profit' entity; the partnership later expanded with a multi-billion investment in January 2023.","category":"business","category_label":"Business","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"Microsoft invests in and partners with OpenAI (OpenAI)","url":"https://openai.com/index/microsoft-invests-in-and-partners-with-openai/","type":"official","group":"primary","domain":"openai.com"},{"n":2,"title":"Microsoft and OpenAI extend partnership (Microsoft, Jan 2023)","url":"https://blogs.microsoft.com/blog/2023/01/23/microsoftandopenaiextendpartnership/","type":"official","group":"primary","domain":"blogs.microsoft.com"}],"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Microsoft","OpenAI"],"title":"Microsoft invests $1 billion in OpenAI","summary":"Microsoft invested $1B in OpenAI and became its exclusive cloud provider, months after OpenAI created a 'capped-profit' entity; the partnership later expanded with a multi-billion investment in January 2023.","key_facts":["Announced 22 July 2019","Azure became OpenAI's exclusive cloud provider","OpenAI LP (capped-profit) formed in March 2019","Microsoft announced a further multiyear, multibillion-dollar investment in January 2023"],"key_numbers":[],"tags":["investment","compute","partnership"],"science":null,"body_md":"## What happened\n\nThe deal gave OpenAI the compute to train GPT-3 and GPT-4 on Azure supercomputers.\n\n## Why it matters\n\nSet the template of Big Tech–frontier lab alliances funding ever-larger training runs.","disputed":[],"related":[{"id":"2020-05-28-gpt-3","url":"https://postcutoff.com/e/2020-05-28-gpt-3/","date":"2020-05-28","date_precision":"day","short_title":"GPT-3 (175B) shows in-context few-shot learning","deck":null,"takeaway":"Turned LLMs into a platform; many startups were built on its API, and it directly preceded InstructGPT and ChatGPT.","category":"model-release","category_label":"Model releases","importance":5,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"]},{"id":"2015-12-11-openai-founded","url":"https://postcutoff.com/e/2015-12-11-openai-founded/","date":"2015-12-11","date_precision":"day","short_title":"OpenAI founded as a non-profit AI research lab","deck":null,"takeaway":"OpenAI went on to create GPT-3, ChatGPT and o1, becoming the most influential lab of the LLM era.","category":"business","category_label":"Business","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"]}],"people":[],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":null,"in_training_data":true},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":null,"in_training_data":true},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":null,"in_training_data":true},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":null,"in_training_data":true}],"short_url":null}