{"schema_version":"onlylabs.public_signal.v1","title":"Anthropic Writing: Claude 2 1","description":"Anthropic writing signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/523be064-cbb4-412d-afef-4ff98b20c68a","json_url":"https://onlylabs.fyi/signals/523be064-cbb4-412d-afef-4ff98b20c68a/signal.json","generated_at":"2026-06-11T04:18:54.1519+00:00","org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab","category_label":"Frontier lab","dossier_url":"https://onlylabs.fyi/labs/anthropic","dossier_json_url":"https://onlylabs.fyi/labs/anthropic/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/523be064-cbb4-412d-afef-4ff98b20c68a","signal_json":"https://onlylabs.fyi/signals/523be064-cbb4-412d-afef-4ff98b20c68a/signal.json","source":"https://www.anthropic.com/news/claude-2-1","lab_dossier":"https://onlylabs.fyi/labs/anthropic","lab_dossier_json":"https://onlylabs.fyi/labs/anthropic/dossier.json","analysis":"https://onlylabs.fyi/analysis/anthropic","analysis_json":"https://onlylabs.fyi/analysis/anthropic/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/anthropic/evidence.json","category":"https://onlylabs.fyi/frontier","category_json":"https://onlylabs.fyi/frontier.json","category_feed":"https://onlylabs.fyi/frontier/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json","topic":"https://onlylabs.fyi/topics/talking","topic_signals_json":"https://onlylabs.fyi/topics/talking/signals.json","topic_feed":"https://onlylabs.fyi/topics/talking/feed.xml","data_business":null},"answer_pack":{"answer":"Anthropic published Claude 2 1. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Introducing Claude 2.1 \\ Anthropic Product Introducing Claude 2.1 Nov 21, 2023 Our latest model, Claude 2.1, is now available over API in our Console and is powering our.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","signal_desk":"talking","source_context":{"source_url":"https://www.anthropic.com/news/claude-2-1","source_host":"anthropic.com","occurred_at":"2023-11-21T00:00:00.000Z","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"page.visible_date","context":null},"context_markers":[{"label":"Lab","value":"Anthropic","source":"signal"},{"label":"Signal desk","value":"talking","source":"signal"},{"label":"Source host","value":"anthropic.com","source":"source"},{"label":"Watch term","value":"Eval methodology","source":"evidence"},{"label":"Watch term","value":"Data pipeline","source":"evidence"},{"label":"Watch term","value":"Infrastructure","source":"evidence"},{"label":"Watch term","value":"Safety and 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narrative layer over raw signals and helps identify which frontier-lab priorities are becoming externally legible.","required_sources":[{"label":"signal_json","url":"https://onlylabs.fyi/signals/523be064-cbb4-412d-afef-4ff98b20c68a/signal.json","required":true},{"label":"source","url":"https://www.anthropic.com/news/claude-2-1","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/anthropic/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/anthropic/evidence.json","required":true},{"label":"topic_signals_json","url":"https://onlylabs.fyi/topics/talking/signals.json","required":false},{"label":"data_radar_json","url":null,"required":false}],"expected_output":["one-paragraph source-grounded interpretation","category-specific implication","confidence and missing evidence","recommended next source to inspect"],"prompt_seed":"Using only the linked onlylabs JSON, captured source context, and cited evidence, analyze 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This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Introducing Claude 2.1 \\ Anthropic Product Introducing Claude 2.1 Nov 21, 2023 Our latest model, Claude 2.1, is now available over API in our Console and is powering our.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","semantic_triples":[{"subject":"Anthropic","predicate":"published","object":"Claude 2 1","text":"Anthropic published Claude 2 1."},{"subject":"Claude 2 1","predicate":"is classified as","object":"writing signal","text":"Claude 2 1 is classified as writing signal."},{"subject":"Claude 2 1","predicate":"belongs to","object":"talking desk","text":"Claude 2 1 belongs to talking desk."},{"subject":"Claude 2 1","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Claude 2 1 has evidence coverage 1 captured evidence page."}]},"signal":{"id":"523be064-cbb4-412d-afef-4ff98b20c68a","url":"https://onlylabs.fyi/signals/523be064-cbb4-412d-afef-4ff98b20c68a","json_url":"https://onlylabs.fyi/signals/523be064-cbb4-412d-afef-4ff98b20c68a/signal.json","source_url":"https://www.anthropic.com/news/claude-2-1","title":"Claude 2 1","summary":"Anthropic published a writing signal. onlylabs watches public writing for research themes, product direction, and model-launch context.","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"anthropic","name":"Anthropic","category":"frontier-lab"},"occurred_at":"2023-11-21T00:00:00.000Z","first_seen_at":"2026-06-09T02:17:26.339488+00:00","date_source":"page.visible_date","evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["plain"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://www.anthropic.com/news/claude-2-1"]},"facets":{},"traction":{"github_stars":null,"hn_points":null,"hn_comments":null,"hn_story_id":null,"hf_downloads":null,"hf_likes":null},"data_radar":null},"primary_evidence_page":{"url":"https://www.anthropic.com/news/claude-2-1","final_url":"https://www.anthropic.com/news/claude-2-1","title":"Claude 2 1","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T04:18:54.1519+00:00","bytes":125343,"raw_path":"013fa77665db256fcebb88a3ab05da3ea062089aa4abf8cf3a3586c22d65dd83.html","content_hash":"44636dcb20d576f85062ec2a454e703d685ef0fd6cbfe859b0ff01c705caab29","excerpt_chars":1200,"truncated":true,"excerpt":"Introducing Claude 2.1 \\ Anthropic Product Introducing Claude 2.1 Nov 21, 2023 Our latest model, Claude 2.1, is now available over API in our Console and is powering our claude.ai chat experience. 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Claude 2.1 delivers advancements in key capabilities for enterprises—including an industry-leading 200K token context window, significant reductions in rates of model hallucination, system prompts and our new beta feature: tool use. We are also updating our pricing to improve cost efficiency for our customers across models. 200K Context Window Since our launch earlier this year, Claude has been used by millions of people for a wide range of applications—from translating academic papers to drafting business plans and analyzing complex contracts. In discussions with our users, they’ve asked for larger context windows and more accurate outputs when working with long documents. In response, we’re doubling the amount of information you can relay to Claude with a limit of 200,000 tokens, translating to roughly 150,000 words, or over 500 pages of material. 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