{"schema_version":"onlylabs.public_signal.v1","title":"OpenAI Writing: Prompt Caching in the API","description":"OpenAI writing signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/aea6748e-60d3-4139-a983-3b518ab0367d","json_url":"https://onlylabs.fyi/signals/aea6748e-60d3-4139-a983-3b518ab0367d/signal.json","generated_at":"2026-06-08T15:45:56.717+00:00","org":{"slug":"openai","name":"OpenAI","category":"frontier-lab","category_label":"Frontier lab","dossier_url":"https://onlylabs.fyi/labs/openai","dossier_json_url":"https://onlylabs.fyi/labs/openai/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/aea6748e-60d3-4139-a983-3b518ab0367d","signal_json":"https://onlylabs.fyi/signals/aea6748e-60d3-4139-a983-3b518ab0367d/signal.json","source":"https://openai.com/index/api-prompt-caching","lab_dossier":"https://onlylabs.fyi/labs/openai","lab_dossier_json":"https://onlylabs.fyi/labs/openai/dossier.json","analysis":"https://onlylabs.fyi/analysis/openai","analysis_json":"https://onlylabs.fyi/analysis/openai/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/openai/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":"OpenAI published Prompt Caching in the API. 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High-signal details: Notable API feature from OpenAI · Prompt Caching in the API | OpenAI October 1, 2024 Prompt Caching in the API Offering automatic discounts on inputs that the model has recently seen Share Many.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","signal_desk":"talking","source_context":{"source_url":"https://openai.com/index/api-prompt-caching","source_host":"openai.com","occurred_at":"2024-10-01T10:03:00+00:00","first_seen_at":"2026-06-05T05:42:57.832854+00:00","date_source":"rss.item_date","context":null},"context_markers":[{"label":"Lab","value":"OpenAI","source":"signal"},{"label":"Signal desk","value":"talking","source":"signal"},{"label":"Source host","value":"openai.com","source":"source"},{"label":"Notability","value":"Notable API feature from 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public writing and discussion into a readable map of research themes, product framing, policy posture, launch narratives, and market attention.","evidence_focus":["post title","source URL","captured page text","HN traction","linked model or paper references","publication date"],"extraction_questions":["Which themes are labs choosing to explain publicly?","Which posts are attracting outside discussion?","Which writing reframes a recent release, model, hiring wave, or policy stance?","Which posts mention data, evals, infrastructure, safety, or deployment workflows?"],"signal_questions":["What public theme, launch framing, or research direction does this writing signal expose?","Which themes are labs choosing to explain publicly?","Which posts are attracting outside discussion?","Do the 6 related writing signals show a repeated pattern?"],"output_fields":["org","theme","public_framing","traction","data_business_lane","evidence_url"],"data_business_relevance":"Public writing supplies the 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/aea6748e-60d3-4139-a983-3b518ab0367d/signal.json","required":true},{"label":"source","url":"https://openai.com/index/api-prompt-caching","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/openai/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/openai/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 OpenAI's 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Caching in the API has readable page count 1."},{"subject":"Prompt Caching in the API","predicate":"has related signal count","object":"6","text":"Prompt Caching in the API has related signal count 6."},{"subject":"Prompt Caching in the API","predicate":"has analysis playbook objective","object":"Turn public writing and discussion into a readable map of research themes, product framing, policy posture, launch narratives, and market attention.","text":"Prompt Caching in the API has analysis playbook objective Turn public writing and discussion into a readable map of research themes, product framing, policy posture, launch narratives, and market attention.."},{"subject":"Prompt Caching in the API","predicate":"has source host","object":"openai.com","text":"Prompt Caching in the API has source host openai.com."},{"subject":"Prompt Caching in the API","predicate":"has lab","object":"OpenAI","text":"Prompt Caching in the API has lab OpenAI."},{"subject":"Prompt Caching in the 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This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Notable API feature from OpenAI · Prompt Caching in the API | OpenAI October 1, 2024 Prompt Caching in the API Offering automatic discounts on inputs that the model has recently seen Share Many.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","semantic_triples":[{"subject":"OpenAI","predicate":"published","object":"Prompt Caching in the API","text":"OpenAI published Prompt Caching in the API."},{"subject":"Prompt Caching in the API","predicate":"is classified as","object":"writing signal","text":"Prompt Caching in the API is classified as writing signal."},{"subject":"Prompt Caching in the API","predicate":"belongs to","object":"talking desk","text":"Prompt Caching in the API belongs to talking desk."},{"subject":"Prompt Caching in the API","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Prompt Caching in the API has evidence coverage 1 captured evidence page."}]},"signal":{"id":"aea6748e-60d3-4139-a983-3b518ab0367d","url":"https://onlylabs.fyi/signals/aea6748e-60d3-4139-a983-3b518ab0367d","json_url":"https://onlylabs.fyi/signals/aea6748e-60d3-4139-a983-3b518ab0367d/signal.json","source_url":"https://openai.com/index/api-prompt-caching","title":"Prompt Caching in the API","summary":"OpenAI 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":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2024-10-01T10:03:00+00:00","first_seen_at":"2026-06-05T05:42:57.832854+00:00","date_source":"rss.item_date","evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["exa"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://openai.com/index/api-prompt-caching"]},"facets":{},"traction":{"github_stars":null,"hn_points":4,"hn_comments":0,"hn_story_id":"41715781","hf_downloads":null,"hf_likes":null},"data_radar":null},"primary_evidence_page":{"url":"https://openai.com/index/api-prompt-caching","final_url":"https://openai.com/index/api-prompt-caching","title":"Prompt Caching in the API","http_status":200,"content_type":null,"capture_method":"exa","fetched_at":"2026-06-08T15:45:56.717+00:00","bytes":null,"raw_path":null,"content_hash":null,"excerpt_chars":1200,"truncated":true,"excerpt":"Prompt Caching in the API | OpenAI October 1, 2024 Prompt Caching in the API Offering automatic discounts on inputs that the model has recently seen Share Many developers use the same context repeatedly across multiple API calls when building AI applications, like when making edits to a codebase or having long, multi-turn conversations with a chatbot. Today, we’re introducing Prompt Caching, allowing developers to reduce costs and latency. By reusing recently seen input tokens, developers can get a 50% discount and faster prompt processing times. Prompt Caching Availability & Pricing Starting today, Prompt Caching is automatically applied on the latest versions of GPT‑4o, GPT‑4o mini, o1‑preview and o1‑mini, as well as fine-tuned versions of those models. Cached prompts are offered at a discount compared to uncached prompts. Here's an overview of pricing: Uncached Input Tokens Cached Input Tokens Output Tokens GPT‑4o gpt-4o-2024-08-06 $2.50 $1.25 $10.00 GPT‑4o fine-tuning $3.75 $1.875 $15.00 GPT‑4o mini gpt-4o-mini-2024-07-18 $0.15 $0.075 $0.60 GPT‑4o mini fine-tuning $0.30 $0.15 $1.20 o1 o1‑preview $15.00 $7.50 $60.00 o1 mini $3.00 $1.50 $12.00 Monitoring Cache Usage API calls to..."},"evidence_pages":[{"url":"https://openai.com/index/api-prompt-caching","final_url":"https://openai.com/index/api-prompt-caching","title":"Prompt Caching in the API","http_status":200,"content_type":null,"capture_method":"exa","fetched_at":"2026-06-08T15:45:56.717+00:00","bytes":null,"raw_path":null,"content_hash":null,"excerpt_chars":1200,"truncated":true,"excerpt":"Prompt Caching in the API | OpenAI October 1, 2024 Prompt Caching in the API Offering automatic discounts on inputs that the model has recently seen Share Many developers use the same context repeatedly across multiple API calls when building AI applications, like when making edits to a codebase or having long, multi-turn conversations with a chatbot. Today, we’re introducing Prompt Caching, allowing developers to reduce costs and latency. By reusing recently seen input tokens, developers can get a 50% discount and faster prompt processing times. Prompt Caching Availability & Pricing Starting today, Prompt Caching is automatically applied on the latest versions of GPT‑4o, GPT‑4o mini, o1‑preview and o1‑mini, as well as fine-tuned versions of those models. Cached prompts are offered at a discount compared to uncached prompts. Here's an overview of pricing: Uncached Input Tokens Cached Input Tokens Output Tokens GPT‑4o gpt-4o-2024-08-06 $2.50 $1.25 $10.00 GPT‑4o fine-tuning $3.75 $1.875 $15.00 GPT‑4o mini gpt-4o-mini-2024-07-18 $0.15 $0.075 $0.60 GPT‑4o mini fine-tuning $0.30 $0.15 $1.20 o1 o1‑preview $15.00 $7.50 $60.00 o1 mini $3.00 $1.50 $12.00 Monitoring Cache Usage API calls to..."}],"related_signals":[{"id":"b3668d3b-26d2-40c0-9d4f-ed1a67927aa4","url":"https://onlylabs.fyi/signals/b3668d3b-26d2-40c0-9d4f-ed1a67927aa4","source_url":"https://openai.com/index/supporting-eu-trustworthy-ai-ecosystem","title":"Supporting Europe’s work in ensuring a trustworthy AI ecosystem ","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-06-11T00:00:00+00:00","first_seen_at":"2026-06-11T08:00:56.140796+00:00","date_source":"rss.item_date"},{"id":"2638c0a7-b372-409c-ac72-f6d81d6464dc","url":"https://onlylabs.fyi/signals/2638c0a7-b372-409c-ac72-f6d81d6464dc","source_url":"https://openai.com/index/using-codex-to-simulate-black-holes","title":"How an astrophysicist uses Codex to help simulate black holes","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-06-11T00:00:00+00:00","first_seen_at":"2026-06-11T07:01:16.936464+00:00","date_source":"rss.item_date"},{"id":"509ea784-51ec-4ede-855b-5a4d1b27d3be","url":"https://onlylabs.fyi/signals/509ea784-51ec-4ede-855b-5a4d1b27d3be","source_url":"https://openai.com/index/openai-on-oracle-cloud","title":"Access OpenAI models and Codex through your Oracle cloud commitment","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-06-10T20:00:00+00:00","first_seen_at":"2026-06-11T07:01:16.936464+00:00","date_source":"rss.item_date"},{"id":"4f051449-87f2-466e-941e-b5918381a8fe","url":"https://onlylabs.fyi/signals/4f051449-87f2-466e-941e-b5918381a8fe","source_url":"https://openai.com/index/prc-linked-influence-operations-ai-debates","title":"PRC-linked influence operations are targeting AI debates in the US","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-06-10T12:00:00+00:00","first_seen_at":"2026-06-11T07:01:16.936464+00:00","date_source":"rss.item_date"},{"id":"4507c0c1-cb74-4bb3-b62b-5f6c2d37e20d","url":"https://onlylabs.fyi/signals/4507c0c1-cb74-4bb3-b62b-5f6c2d37e20d","source_url":"https://openai.com/index/lseg","title":"From data to decisions: how LSEG is scaling trusted AI","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-06-10T00:00:00+00:00","first_seen_at":"2026-06-10T09:18:54.26094+00:00","date_source":"rss.item_date"},{"id":"fb16aa7a-c4ef-4859-b514-0839c2f1330d","url":"https://onlylabs.fyi/signals/fb16aa7a-c4ef-4859-b514-0839c2f1330d","source_url":"https://openai.com/index/nextdoor","title":"How engineers at Nextdoor use Codex to build without limits","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"openai","name":"OpenAI","category":"frontier-lab"},"occurred_at":"2026-06-09T12:00:00+00:00","first_seen_at":"2026-06-10T07:01:28.700378+00:00","date_source":"rss.item_date"}]}