{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2024-03-04-claude-3/","md":"https://postcutoff.com/e/2024-03-04-claude-3/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":"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":"Claude 3 Opus, Sonnet and Haiku introduced vision and a 200K context window; Anthropic reported that Opus outperformed GPT-4 on most common benchmarks, making it the first model widely seen as matching or beating GPT-4.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"Introducing the next generation of Claude (Anthropic)","url":"https://www.anthropic.com/news/claude-3-family","type":"official","group":"primary","domain":"anthropic.com"},{"n":2,"title":"Claude 3 Model Card (PDF)","url":"https://www-cdn.anthropic.com/de8ba9b01c9ab7cbabf5c33b80b7bbc618857627/Model_Card_Claude_3.pdf","type":"docs","group":"primary","domain":"www-cdn.anthropic.com"}],"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"],"title":"Anthropic launches the Claude 3 family (Opus, Sonnet, Haiku)","summary":"Claude 3 Opus, Sonnet and Haiku introduced vision and a 200K context window; Anthropic reported that Opus outperformed GPT-4 on most common benchmarks, making it the first model widely seen as matching or beating GPT-4.","key_facts":["Released 4 March 2024 (Haiku followed on 13 March)","Three tiers: Opus (most capable), Sonnet, Haiku (fastest)","200K-token context window; image input","Opus priced at $15 / $75 per million input/output tokens"],"key_numbers":[],"tags":["llm","claude","anthropic","multimodal"],"science":null,"body_md":"## What happened\n\nAnthropic released a three-tier family across capability and cost, available in claude.ai and via API, Amazon Bedrock and Google Cloud Vertex AI.\n\n## Why it matters\n\nEnded GPT-4's year-long uncontested lead and established the Opus/Sonnet/Haiku naming used thereafter.","disputed":[],"related":[{"id":"2024-06-20-claude-3-5-sonnet","url":"https://postcutoff.com/e/2024-06-20-claude-3-5-sonnet/","date":"2024-06-20","date_precision":"day","short_title":"Claude 3.5 Sonnet launches with Artifacts","deck":null,"takeaway":"Established Claude as the leading coding model, driving adoption in tools like Cursor and paving the way for coding agents.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"]},{"id":"2023-07-11-claude-2","url":"https://postcutoff.com/e/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":"Established Claude as a mainstream alternative to ChatGPT and pushed long-context as a competitive feature.","category":"model-release","category_label":"Model releases","importance":3,"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":"https://postcutoff.com/s/anthropic-claude-3-family"}