{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2023-03-14-gpt-4/","md":"https://postcutoff.com/e/2023-03-14-gpt-4/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":"2023-03-14-gpt-4","date":"2023-03-14","date_precision":"day","short_title":"OpenAI releases GPT-4","deck":null,"takeaway":"GPT-4, a large multimodal model accepting image and text input, reached human-level performance on many professional and academic exams, such as a simulated bar exam around the top 10% of test takers.","category":"model-release","category_label":"Model releases","importance":5,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"GPT-4 (OpenAI)","url":"https://openai.com/index/gpt-4-research/","type":"official","group":"primary","domain":"openai.com"},{"n":2,"title":"GPT-4 Technical Report (arXiv)","url":"https://arxiv.org/abs/2303.08774","type":"paper","group":"primary","domain":"arxiv.org"}],"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"],"title":"OpenAI releases GPT-4","summary":"GPT-4, a large multimodal model accepting image and text input, reached human-level performance on many professional and academic exams, such as a simulated bar exam around the top 10% of test takers.","key_facts":["Released 14 March 2023 in ChatGPT Plus and via API waitlist","Simulated bar exam: around the top 10% of test takers (GPT-3.5: bottom 10%)","Accepted image inputs (image input rolled out later)","Technical report withheld architecture and training details","Microsoft confirmed Bing Chat had been running on GPT-4"],"key_numbers":[],"tags":["llm","gpt","multimodal","frontier"],"science":null,"body_md":"## What happened\n\nOpenAI launched GPT-4 with a technical report and system card, showing a large jump over GPT-3.5 in reasoning and exams.\n\n## Why it matters\n\nDefined the frontier for over a year and triggered serious policy attention to AI risk (pause letter, hearings, summits).","disputed":[],"related":[{"id":"2024-05-13-gpt-4o","url":"https://postcutoff.com/e/2024-05-13-gpt-4o/","date":"2024-05-13","date_precision":"day","short_title":"OpenAI launches GPT-4o, a natively multimodal 'omni' model","deck":null,"takeaway":"Made natural voice interaction with AI mainstream and set the standard for omni-modal assistants.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"]},{"id":"2023-03-14-claude-1","url":"https://postcutoff.com/e/2023-03-14-claude-1/","date":"2023-03-14","date_precision":"day","short_title":"Anthropic releases Claude","deck":null,"takeaway":"Started the Claude model family, which became a leading competitor to GPT models, especially in coding and agents.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"]},{"id":"2022-11-30-chatgpt","url":"https://postcutoff.com/e/2022-11-30-chatgpt/","date":"2022-11-30","date_precision":"day","short_title":"OpenAI launches ChatGPT","deck":null,"takeaway":"The moment AI became a mass-market technology — the start of the current era of AI investment, adoption and policy attention.","category":"product","category_label":"Products","importance":5,"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":"https://postcutoff.com/s/openai-gpt-4"}