{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2023-07-11-claude-2/","md":"https://postcutoff.com/e/2023-07-11-claude-2/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":"2023-07-11-claude-2","date":"2023-07-11","date_precision":"day","short_title":"Anthropic releases Claude 2 with public claude.ai access","deck":null,"takeaway":"Claude 2 improved coding, math and reasoning, offered a 100K-token context window, and launched with the public claude.ai beta in the US and UK.","category":"model-release","category_label":"Model releases","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"Claude 2 (Anthropic)","url":"https://www.anthropic.com/news/claude-2","type":"official","group":"primary","domain":"anthropic.com"},{"n":2,"title":"Introducing Claude 2.1 (Anthropic)","url":"https://www.anthropic.com/news/claude-2-1","type":"official","group":"primary","domain":"anthropic.com"}],"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"],"title":"Anthropic releases Claude 2 with public claude.ai access","summary":"Claude 2 improved coding, math and reasoning, offered a 100K-token context window, and launched with the public claude.ai beta in the US and UK.","key_facts":["Released 11 July 2023","100K-token context window","Scored 76.5% on the multiple-choice section of the Bar exam (per Anthropic)","Claude 2.1 (November 2023) doubled context to 200K tokens"],"key_numbers":[],"tags":["llm","claude","anthropic","long-context"],"science":null,"body_md":"## What happened\n\nAnthropic released a stronger model and made its consumer chat product broadly available for the first time.\n\n## Why it matters\n\nEstablished Claude as a mainstream alternative to ChatGPT and pushed long-context as a competitive feature.","disputed":[],"related":[{"id":"2024-03-04-claude-3","url":"https://postcutoff.com/e/2024-03-04-claude-3/","date":"2024-03-04","date_precision":"day","short_title":"Anthropic launches the Claude 3 family (Opus, Sonnet, Haiku)","deck":null,"takeaway":"Ended GPT-4's year-long uncontested lead and established the Opus/Sonnet/Haiku naming used thereafter.","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":"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"]}],"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}