{"schema_version":"onlylabs.public_signal.v1","title":"Upstage (Solar) Writing: Solar Pro 4","description":"Upstage (Solar) writing signal with public source context, captured evidence pages, related signals, and category-scoped analysis context.","url":"https://onlylabs.fyi/signals/fa3a27b2-c4c7-4160-8ce0-239c50019177","json_url":"https://onlylabs.fyi/signals/fa3a27b2-c4c7-4160-8ce0-239c50019177/signal.json","generated_at":"2026-08-28T17:48:47.667Z","evidence_latest_fetched_at":"2026-08-11T08:04:42.405461+00:00","signal_first_seen_at":"2026-08-11T08:03:38.902635+00:00","org":{"slug":"upstage","name":"Upstage (Solar)","category":"neolab","category_label":"Neolab","dossier_url":"https://onlylabs.fyi/labs/upstage","dossier_json_url":"https://onlylabs.fyi/labs/upstage/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/fa3a27b2-c4c7-4160-8ce0-239c50019177","signal_json":"https://onlylabs.fyi/signals/fa3a27b2-c4c7-4160-8ce0-239c50019177/signal.json","source":"https://www.upstage.ai/blog/en/solar-pro-4","lab_dossier":"https://onlylabs.fyi/labs/upstage","lab_dossier_json":"https://onlylabs.fyi/labs/upstage/dossier.json","analysis":"https://onlylabs.fyi/analysis/upstage","analysis_json":"https://onlylabs.fyi/analysis/upstage/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/upstage/evidence.json","category":"https://onlylabs.fyi/neolabs","category_json":"https://onlylabs.fyi/neolabs.json","category_feed":"https://onlylabs.fyi/neolabs/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json?category=neolab","topic":"https://onlylabs.fyi/topics/talking","topic_signals_json":"https://onlylabs.fyi/topics/talking/signals.json?category=neolab","topic_feed":"https://onlylabs.fyi/topics/talking/feed.xml?category=neolab","data_business":null},"answer_pack":{"answer":"Upstage (Solar) published Solar Pro 4. 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[Start with Solar Pro 4 on Upstage Console] To mark the launch, Solar Pro 4 is 90% off on Upstage Console and OpenRouter through September 10. 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