{"schema_version":"onlylabs.public_signal.v1","title":"Baseten Writing: Muse Spark Open Launch","description":"Baseten writing signal with public source context, captured evidence pages, related signals, and category-scoped analysis context.","url":"https://onlylabs.fyi/signals/bf3c043b-e462-4792-8494-364ed2c5bfb8","json_url":"https://onlylabs.fyi/signals/bf3c043b-e462-4792-8494-364ed2c5bfb8/signal.json","generated_at":"2026-10-25T03:48:08.213Z","evidence_latest_fetched_at":"2026-10-15T20:02:27.714725+00:00","signal_first_seen_at":"2026-10-15T20:00:52.649198+00:00","org":{"slug":"baseten","name":"Baseten","category":"neocloud","category_label":"Neocloud","dossier_url":"https://onlylabs.fyi/labs/baseten","dossier_json_url":"https://onlylabs.fyi/labs/baseten/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/bf3c043b-e462-4792-8494-364ed2c5bfb8","signal_json":"https://onlylabs.fyi/signals/bf3c043b-e462-4792-8494-364ed2c5bfb8/signal.json","source":"https://www.baseten.co/blog/muse-spark-open-launch/","lab_dossier":"https://onlylabs.fyi/labs/baseten","lab_dossier_json":"https://onlylabs.fyi/labs/baseten/dossier.json","analysis":"https://onlylabs.fyi/analysis/baseten","analysis_json":"https://onlylabs.fyi/analysis/baseten/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/baseten/evidence.json","category":"https://onlylabs.fyi/neoclouds","category_json":"https://onlylabs.fyi/neoclouds.json","category_feed":"https://onlylabs.fyi/neoclouds/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json?category=neocloud","topic":"https://onlylabs.fyi/topics/talking","topic_signals_json":"https://onlylabs.fyi/topics/talking/signals.json?category=neocloud","topic_feed":"https://onlylabs.fyi/topics/talking/feed.xml?category=neocloud","data_business":null},"answer_pack":{"answer":"Baseten published Muse Spark Open Launch. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Open model launch from Baseten, moderate industry relevance. · Muse Spark Open, an open-weight model for coding agents Use your OpenAI commitments on Baseten open models . Learn more AI models Muse Spark Open, an open-weight model.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","signal_desk":"talking","source_context":{"source_url":"https://www.baseten.co/blog/muse-spark-open-launch/","source_host":"baseten.co","occurred_at":"2026-10-15T17:27:04+00:00","first_seen_at":"2026-10-15T20:00:52.649198+00:00","date_source":"sitemap.lastmod","context":null},"context_markers":[{"label":"Lab","value":"Baseten","source":"signal"},{"label":"Signal desk","value":"talking","source":"signal"},{"label":"Source host","value":"baseten.co","source":"source"},{"label":"Notability","value":"Open model launch from Baseten, moderate industry relevance.","source":"signal"},{"label":"Watch term","value":"Eval methodology","source":"evidence"},{"label":"Watch term","value":"Infrastructure","source":"evidence"},{"label":"Watch term","value":"Agents and tool use","source":"evidence"}],"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.baseten.co/blog/muse-spark-open-launch/"],"related_signals":6,"has_source_url":true,"latest_page_fetched_at":"2026-10-15T20:02:27.714725+00:00"},"data_business":{"matches":false,"lanes":[],"matched_terms":[],"score":null,"reason":null},"agent_handoff":{"signal_json":"https://onlylabs.fyi/signals/bf3c043b-e462-4792-8494-364ed2c5bfb8/signal.json","dossier_json":"https://onlylabs.fyi/labs/baseten/dossier.json","analysis_json":"https://onlylabs.fyi/analysis/baseten/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/baseten/evidence.json","topic_signals_json":"https://onlylabs.fyi/topics/talking/signals.json?category=neocloud","topic_feed":"https://onlylabs.fyi/topics/talking/feed.xml?category=neocloud","category_signals_json":"https://onlylabs.fyi/signals.json?category=neocloud","data_radar_json":null,"opportunities_json":null},"analysis_playbook":{"objective":"Turn 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","evidence_url"],"data_business_relevance":"Data-business lane extraction is scoped to frontier labs; for this category, keep conclusions tied to category-specific strategy, source evidence, and follow-up questions.","required_sources":[{"label":"signal_json","url":"https://onlylabs.fyi/signals/bf3c043b-e462-4792-8494-364ed2c5bfb8/signal.json","required":true},{"label":"source","url":"https://www.baseten.co/blog/muse-spark-open-launch/","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/baseten/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/baseten/evidence.json","required":true},{"label":"topic_signals_json","url":"https://onlylabs.fyi/topics/talking/signals.json?category=neocloud","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 Baseten's writing signal \"Muse Spark Open Launch\" for neocloud strategy."},"semantic_triples":[{"subject":"Baseten","predicate":"published","object":"Muse Spark Open Launch","text":"Baseten published Muse Spark Open Launch."},{"subject":"Muse Spark Open Launch","predicate":"is classified as","object":"writing signal","text":"Muse Spark Open Launch is classified as writing signal."},{"subject":"Muse Spark Open Launch","predicate":"belongs to","object":"talking desk","text":"Muse Spark Open Launch belongs to talking desk."},{"subject":"Muse Spark Open Launch","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Muse Spark Open Launch has evidence coverage 1 captured evidence page."},{"subject":"Muse Spark Open Launch","predicate":"has captured page count","object":"1","text":"Muse Spark Open Launch has captured page count 1."},{"subject":"Muse Spark Open Launch","predicate":"has readable page count","object":"1","text":"Muse Spark Open Launch has readable page count 1."},{"subject":"Muse Spark Open Launch","predicate":"has related signal count","object":"6","text":"Muse Spark Open Launch has related signal count 6."},{"subject":"Muse Spark Open Launch","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":"Muse Spark Open Launch 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":"Muse Spark Open Launch","predicate":"has source host","object":"baseten.co","text":"Muse Spark Open Launch has source host baseten.co."},{"subject":"Muse Spark Open Launch","predicate":"has lab","object":"Baseten","text":"Muse Spark Open Launch has lab Baseten."},{"subject":"Muse Spark Open Launch","predicate":"has signal desk","object":"talking","text":"Muse Spark Open Launch has signal desk talking."},{"subject":"Muse Spark Open Launch","predicate":"has source host","object":"baseten.co","text":"Muse Spark Open Launch has source host baseten.co."},{"subject":"Muse Spark Open Launch","predicate":"has notability","object":"Open model launch from Baseten, moderate industry relevance.","text":"Muse Spark Open Launch has notability Open model launch from Baseten, moderate industry relevance.."},{"subject":"Muse Spark Open Launch","predicate":"has watch term","object":"Eval methodology","text":"Muse Spark Open Launch has watch term Eval methodology."},{"subject":"Muse Spark Open Launch","predicate":"has watch term","object":"Infrastructure","text":"Muse Spark Open Launch has watch term Infrastructure."},{"subject":"Muse Spark Open Launch","predicate":"has watch term","object":"Agents and tool use","text":"Muse Spark Open Launch has watch term Agents and tool use."}]},"intelligence":{"signal_desk":"talking","answer":"Baseten published Muse Spark Open Launch. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Open model launch from Baseten, moderate industry relevance. · Muse Spark Open, an open-weight model for coding agents Use your OpenAI commitments on Baseten open models . Learn more AI models Muse Spark Open, an open-weight model.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","semantic_triples":[{"subject":"Baseten","predicate":"published","object":"Muse Spark Open Launch","text":"Baseten published Muse Spark Open Launch."},{"subject":"Muse Spark Open Launch","predicate":"is classified as","object":"writing signal","text":"Muse Spark Open Launch is classified as writing signal."},{"subject":"Muse Spark Open Launch","predicate":"belongs to","object":"talking desk","text":"Muse Spark Open Launch belongs to talking desk."},{"subject":"Muse Spark Open Launch","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Muse Spark Open Launch has evidence coverage 1 captured evidence page."}]},"signal":{"id":"bf3c043b-e462-4792-8494-364ed2c5bfb8","url":"https://onlylabs.fyi/signals/bf3c043b-e462-4792-8494-364ed2c5bfb8","json_url":"https://onlylabs.fyi/signals/bf3c043b-e462-4792-8494-364ed2c5bfb8/signal.json","source_url":"https://www.baseten.co/blog/muse-spark-open-launch/","title":"Muse Spark Open Launch","summary":"Baseten 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":"baseten","name":"Baseten","category":"neocloud"},"occurred_at":"2026-10-15T17:27:04+00:00","first_seen_at":"2026-10-15T20:00:52.649198+00:00","date_source":"sitemap.lastmod","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.baseten.co/blog/muse-spark-open-launch/"]},"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":{"is_primary":true,"source_match":true,"url":"https://www.baseten.co/blog/muse-spark-open-launch/","final_url":"https://www.baseten.co/blog/muse-spark-open-launch/","title":"Muse Spark Open Launch","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-10-15T20:02:27.714725+00:00","bytes":340146,"raw_path":"f785252e309b8824cae0937e0cc6092beab735d5422fd7dc78b8950bb847e08a.html","content_hash":"e382100c46b8c8a46dd7410332e11fff2d014a90085617d1dc638164fa98d6e1","excerpt_chars":1200,"truncated":true,"excerpt":"Muse Spark Open, an open-weight model for coding agents Use your OpenAI commitments on Baseten open models . Learn more AI models Muse Spark Open, an open-weight model for coding agents Muse Spark Open is now available on Baseten. This 816B open-weight omnimodal model is optimized for coding agent workflows, with a 1M token context. Authors Albert Lee Pavel Belevich Marylise Tauzia Published October 15, 2026 Share Published October 15, 2026 TL;DR Today, Meta released the weights for Muse Spark Open, an 816B-parameter open-weight omnimodal MoE model co-trained with Muse Code for coding agent workflows. Its compressed MoE block and hybrid global/local attention cut inter-GPU traffic and KV cache memory for long agent sessions. It is the most capable US open-weights model to date. Muse Spark Open is available now on Baseten Model APIs and Dedicated Inference, served in NVFP4. Meta released the weights for Muse Spark Open, and the open-weight release is available day 0 on Baseten Model APIs and Dedicated Inference. It is the most capable US open-weights model to date. Muse Spark Open has: 816B total parameters with 42.7B active during inference, a 1M token context window, and..."},"evidence_pages":[],"related_signals":[{"id":"78cf7f66-c61f-4d9e-9915-d71bceb9713a","url":"https://onlylabs.fyi/signals/78cf7f66-c61f-4d9e-9915-d71bceb9713a","source_url":"https://www.baseten.co/resources/changelog/revocation-of-unused-api-keys-on-1024/","title":"Revocation Of Unused Api Keys On 1024","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"baseten","name":"Baseten","category":"neocloud"},"occurred_at":"2026-10-24T20:50:20+00:00","first_seen_at":"2026-10-25T00:00:51.929693+00:00","date_source":"sitemap.lastmod"},{"id":"f59349c6-0f8c-4f25-bf1a-b304a54e330e","url":"https://onlylabs.fyi/signals/f59349c6-0f8c-4f25-bf1a-b304a54e330e","source_url":"https://www.baseten.co/resources/changelog/upcoming-change-to-api-authentication-error-responses/","title":"Upcoming Change To Api Authentication Error Responses","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"baseten","name":"Baseten","category":"neocloud"},"occurred_at":"2026-10-23T18:23:24+00:00","first_seen_at":"2026-10-23T20:00:52.81554+00:00","date_source":"sitemap.lastmod"},{"id":"05a1cd15-31c4-4bb2-a370-956793dc53b3","url":"https://onlylabs.fyi/signals/05a1cd15-31c4-4bb2-a370-956793dc53b3","source_url":"https://www.baseten.co/blog/introducing-the-baseten-environment-network/","title":"Introducing The Baseten Environment Network","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"baseten","name":"Baseten","category":"neocloud"},"occurred_at":"2026-10-23T17:36:54+00:00","first_seen_at":"2026-10-23T20:00:52.81554+00:00","date_source":"sitemap.lastmod"},{"id":"faec1ddc-d1cf-4b50-832c-6a0243d83e6f","url":"https://onlylabs.fyi/signals/faec1ddc-d1cf-4b50-832c-6a0243d83e6f","source_url":"https://www.baseten.co/resources/changelog/upcoming-automatic-revocation-of-unused-api-keys/","title":"Upcoming Automatic Revocation Of Unused Api Keys","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"baseten","name":"Baseten","category":"neocloud"},"occurred_at":"2026-10-23T16:58:14+00:00","first_seen_at":"2026-10-23T20:00:52.81554+00:00","date_source":"sitemap.lastmod"},{"id":"90731969-9fa0-4df9-a3a2-c28925056bd5","url":"https://onlylabs.fyi/signals/90731969-9fa0-4df9-a3a2-c28925056bd5","source_url":"https://www.baseten.co/resources/changelog/security-notice-please-upgrade-baseten-cli-and-truss-cli/","title":"Security Notice Please Upgrade Baseten Cli And Truss Cli","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"baseten","name":"Baseten","category":"neocloud"},"occurred_at":"2026-10-22T22:38:03+00:00","first_seen_at":"2026-10-23T00:00:51.78418+00:00","date_source":"sitemap.lastmod"},{"id":"e4a569f6-224d-4666-8943-6744fdd024c1","url":"https://onlylabs.fyi/signals/e4a569f6-224d-4666-8943-6744fdd024c1","source_url":"https://www.baseten.co/resources/changelog/gpu-temperature-and-utilization-metrics/","title":"Gpu Temperature And Utilization Metrics","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"baseten","name":"Baseten","category":"neocloud"},"occurred_at":"2026-10-22T22:27:16+00:00","first_seen_at":"2026-10-23T00:00:51.78418+00:00","date_source":"sitemap.lastmod"}]}