{"schema_version":"onlylabs.public_signal.v1","title":"Anthropic Writing: Claude Think Tool","description":"Anthropic writing signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/6256a1e6-5a55-403e-a0a8-6cbb08b48bdb","json_url":"https://onlylabs.fyi/signals/6256a1e6-5a55-403e-a0a8-6cbb08b48bdb/signal.json","generated_at":"2026-06-11T04:15:07.5014+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/6256a1e6-5a55-403e-a0a8-6cbb08b48bdb","signal_json":"https://onlylabs.fyi/signals/6256a1e6-5a55-403e-a0a8-6cbb08b48bdb/signal.json","source":"https://www.anthropic.com/engineering/claude-think-tool","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 Think Tool. This talking signal gives public context for research themes, product direction, policy, or launch framing. 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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/6256a1e6-5a55-403e-a0a8-6cbb08b48bdb/signal.json","required":true},{"label":"source","url":"https://www.anthropic.com/engineering/claude-think-tool","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, 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This talking signal gives public context for research themes, product direction, policy, or launch framing. 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Extended thinking provides similar benefits—giving Claude space to reason through complex problems—with better integration and performance. See our extended thinking documentation for implementation details. As we continue to enhance Claude's complex problem-solving abilities, we've discovered a particularly effective approach: a \"think\" tool that creates dedicated space for structured thinking during complex tasks. This simple yet powerful technique—which, as we’ll explain below, is different from Claude’s new “ extended thinking ” capability (see here for extended thinking implementation details )—has resulted in remarkable improvements in Claude's agentic tool use ability. This includes following..."},"evidence_pages":[{"url":"https://www.anthropic.com/engineering/claude-think-tool","final_url":"https://www.anthropic.com/engineering/claude-think-tool","title":"Claude Think Tool","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-06-11T04:15:07.5014+00:00","bytes":183464,"raw_path":"4d418dad93eb839e23a6b89a1495583ed838ca547d8bfe9a5a29491a2537c078.html","content_hash":"07c490006149b8b74f65b489bc905086694ced541d2f79343503f6a85d0d8fe5","excerpt_chars":1200,"truncated":true,"excerpt":"The \"think\" tool: Enabling Claude to stop and think \\ Anthropic Engineering at Anthropic The \"think\" tool: Enabling Claude to stop and think in complex tool use situations Published Mar 20, 2025 A new tool that improves Claude's complex problem-solving performance Extended thinking update Dec 15, 2025 Extended thinking capabilities have improved since its initial release, such that we recommend using that feature instead of a dedicated think tool in most cases. Extended thinking provides similar benefits—giving Claude space to reason through complex problems—with better integration and performance. See our extended thinking documentation for implementation details. As we continue to enhance Claude's complex problem-solving abilities, we've discovered a particularly effective approach: a \"think\" tool that creates dedicated space for structured thinking during complex tasks. This simple yet powerful technique—which, as we’ll explain below, is different from Claude’s new “ extended thinking ” capability (see here for extended thinking implementation details )—has resulted in remarkable improvements in Claude's agentic tool use ability. 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