{"schema_version":"onlylabs.public_signal.v1","title":"Fireworks AI Writing: Meta Muse Spark Open","description":"Fireworks AI writing signal with public source context, captured evidence pages, related signals, and category-scoped analysis context.","url":"https://onlylabs.fyi/signals/fb61920f-ca1b-4d4d-a921-e503ffc3ea3e","json_url":"https://onlylabs.fyi/signals/fb61920f-ca1b-4d4d-a921-e503ffc3ea3e/signal.json","generated_at":"2026-10-24T22:21:30.631Z","evidence_latest_fetched_at":"2026-10-21T00:04:10.127332+00:00","signal_first_seen_at":"2026-10-21T00:00:53.064952+00:00","org":{"slug":"fireworks-ai","name":"Fireworks AI","category":"neocloud","category_label":"Neocloud","dossier_url":"https://onlylabs.fyi/labs/fireworks-ai","dossier_json_url":"https://onlylabs.fyi/labs/fireworks-ai/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/fb61920f-ca1b-4d4d-a921-e503ffc3ea3e","signal_json":"https://onlylabs.fyi/signals/fb61920f-ca1b-4d4d-a921-e503ffc3ea3e/signal.json","source":"https://fireworks.ai/blog/meta-muse-spark-open","lab_dossier":"https://onlylabs.fyi/labs/fireworks-ai","lab_dossier_json":"https://onlylabs.fyi/labs/fireworks-ai/dossier.json","analysis":"https://onlylabs.fyi/analysis/fireworks-ai","analysis_json":"https://onlylabs.fyi/analysis/fireworks-ai/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/fireworks-ai/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":"Fireworks AI published Meta Muse Spark Open. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Notable model release by Fireworks AI. · Muse Spark Open on Fireworks: Meta’s Open Weights Model, Available on US Serverless Join us for our inaugural conference, Forge 2026 Blog Meta Muse Spark Open Muse Spark.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","signal_desk":"talking","source_context":{"source_url":"https://fireworks.ai/blog/meta-muse-spark-open","source_host":"fireworks.ai","occurred_at":"2026-10-22T05:19:02+00:00","first_seen_at":"2026-10-21T00:00:53.064952+00:00","date_source":"sitemap.lastmod","context":null},"context_markers":[{"label":"Lab","value":"Fireworks AI","source":"signal"},{"label":"Signal desk","value":"talking","source":"signal"},{"label":"Source host","value":"fireworks.ai","source":"source"},{"label":"Notability","value":"Notable model release by Fireworks AI.","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://fireworks.ai/blog/meta-muse-spark-open"],"related_signals":6,"has_source_url":true,"latest_page_fetched_at":"2026-10-21T00:04:10.127332+00:00"},"data_business":{"matches":false,"lanes":[],"matched_terms":[],"score":null,"reason":null},"agent_handoff":{"signal_json":"https://onlylabs.fyi/signals/fb61920f-ca1b-4d4d-a921-e503ffc3ea3e/signal.json","dossier_json":"https://onlylabs.fyi/labs/fireworks-ai/dossier.json","analysis_json":"https://onlylabs.fyi/analysis/fireworks-ai/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/fireworks-ai/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/fb61920f-ca1b-4d4d-a921-e503ffc3ea3e/signal.json","required":true},{"label":"source","url":"https://fireworks.ai/blog/meta-muse-spark-open","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/fireworks-ai/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/fireworks-ai/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 Fireworks AI's writing signal \"Meta Muse Spark Open\" for neocloud strategy."},"semantic_triples":[{"subject":"Fireworks AI","predicate":"published","object":"Meta Muse Spark Open","text":"Fireworks AI published Meta Muse Spark Open."},{"subject":"Meta Muse Spark Open","predicate":"is classified as","object":"writing signal","text":"Meta Muse Spark Open is classified as writing signal."},{"subject":"Meta Muse Spark Open","predicate":"belongs to","object":"talking desk","text":"Meta Muse Spark Open belongs to talking desk."},{"subject":"Meta Muse Spark Open","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Meta Muse Spark Open has evidence coverage 1 captured evidence page."},{"subject":"Meta Muse Spark Open","predicate":"has captured page count","object":"1","text":"Meta Muse Spark Open has captured page count 1."},{"subject":"Meta Muse Spark Open","predicate":"has readable page count","object":"1","text":"Meta Muse Spark Open has readable page count 1."},{"subject":"Meta Muse Spark Open","predicate":"has related signal count","object":"6","text":"Meta Muse Spark Open has related signal count 6."},{"subject":"Meta Muse Spark Open","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":"Meta Muse Spark Open 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":"Meta Muse Spark Open","predicate":"has source host","object":"fireworks.ai","text":"Meta Muse Spark Open has source host fireworks.ai."},{"subject":"Meta Muse Spark Open","predicate":"has lab","object":"Fireworks AI","text":"Meta Muse Spark Open has lab Fireworks AI."},{"subject":"Meta Muse Spark Open","predicate":"has signal desk","object":"talking","text":"Meta Muse Spark Open has signal desk talking."},{"subject":"Meta Muse Spark Open","predicate":"has source host","object":"fireworks.ai","text":"Meta Muse Spark Open has source host fireworks.ai."},{"subject":"Meta Muse Spark Open","predicate":"has notability","object":"Notable model release by Fireworks AI.","text":"Meta Muse Spark Open has notability Notable model release by Fireworks AI.."},{"subject":"Meta Muse Spark Open","predicate":"has watch term","object":"Eval methodology","text":"Meta Muse Spark Open has watch term Eval methodology."},{"subject":"Meta Muse Spark Open","predicate":"has watch term","object":"Infrastructure","text":"Meta Muse Spark Open has watch term Infrastructure."},{"subject":"Meta Muse Spark Open","predicate":"has watch term","object":"Agents and tool use","text":"Meta Muse Spark Open has watch term Agents and tool use."}]},"intelligence":{"signal_desk":"talking","answer":"Fireworks AI published Meta Muse Spark Open. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Notable model release by Fireworks AI. · Muse Spark Open on Fireworks: Meta’s Open Weights Model, Available on US Serverless Join us for our inaugural conference, Forge 2026 Blog Meta Muse Spark Open Muse Spark.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","semantic_triples":[{"subject":"Fireworks AI","predicate":"published","object":"Meta Muse Spark Open","text":"Fireworks AI published Meta Muse Spark Open."},{"subject":"Meta Muse Spark Open","predicate":"is classified as","object":"writing signal","text":"Meta Muse Spark Open is classified as writing signal."},{"subject":"Meta Muse Spark Open","predicate":"belongs to","object":"talking desk","text":"Meta Muse Spark Open belongs to talking desk."},{"subject":"Meta Muse Spark Open","predicate":"has evidence coverage","object":"1 captured evidence page","text":"Meta Muse Spark Open has evidence coverage 1 captured evidence page."}]},"signal":{"id":"fb61920f-ca1b-4d4d-a921-e503ffc3ea3e","url":"https://onlylabs.fyi/signals/fb61920f-ca1b-4d4d-a921-e503ffc3ea3e","json_url":"https://onlylabs.fyi/signals/fb61920f-ca1b-4d4d-a921-e503ffc3ea3e/signal.json","source_url":"https://fireworks.ai/blog/meta-muse-spark-open","title":"Meta Muse Spark Open","summary":"Fireworks AI 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":"fireworks-ai","name":"Fireworks AI","category":"neocloud"},"occurred_at":"2026-10-22T05:19:02+00:00","first_seen_at":"2026-10-21T00:00:53.064952+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://fireworks.ai/blog/meta-muse-spark-open"]},"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://fireworks.ai/blog/meta-muse-spark-open","final_url":"https://fireworks.ai/blog/meta-muse-spark-open","title":"Meta Muse Spark Open","http_status":200,"content_type":"text/html; charset=utf-8","capture_method":"plain","fetched_at":"2026-10-21T00:04:10.127332+00:00","bytes":229058,"raw_path":"a665745e735041eefa9d4ef8ca17a9f5311cea51c710c52193ac49b4bf98630e.html","content_hash":"f726eb83f8500992ef7b013ec5a69fe5b4b80d95c0e240acb0746655c0774f1b","excerpt_chars":1200,"truncated":true,"excerpt":"Muse Spark Open on Fireworks: Meta’s Open Weights Model, Available on US Serverless Join us for our inaugural conference, Forge 2026 Blog Meta Muse Spark Open Muse Spark Open on Fireworks: Meta’s open weights wodel, available on US serverless PUBLISHED 10/20/2026 Muse Spark Open , an open weights model from Meta, is available Day-0 on Fireworks. It's an 816B-parameter mixture-of-experts model with 42B parameters active per token and a 1M-token context window, built for long-horizon coding and agent work that has to stay coherent across very long sessions. It’s one of the most capable US open weights model to date, and the strongest open weights model we’ve seen for regulated professional work. It ranks first on Vals AI’s leaderboard for Harvey’s Legal Agent Benchmark, with nearly 4x the pass rate of Claude Opus 5. On Rogo’s Big Finance Bench, it beat Claude Opus 5.5 at every difficulty level and edged out GPT-6 Astra on the hardest tasks. Muse Spark Open was trained and developed in the US, and Fireworks runs it with Zero Data Retention by default. Try it today on serverless , running on US-only capacity with no US premium. Then move to reserved throughput for production and..."},"evidence_pages":[],"related_signals":[{"id":"7aebe92e-1f9c-461c-8cde-d37d08bd7ec2","url":"https://onlylabs.fyi/signals/7aebe92e-1f9c-461c-8cde-d37d08bd7ec2","source_url":"https://fireworks.ai/blog/deepseek-models","title":"Deepseek Models","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"fireworks-ai","name":"Fireworks AI","category":"neocloud"},"occurred_at":"2026-10-23T03:55:43+00:00","first_seen_at":"2026-06-26T20:26:30.663004+00:00","date_source":"sitemap.lastmod"},{"id":"1c0cfc33-1acd-4a95-a843-27d8f7b95a11","url":"https://onlylabs.fyi/signals/1c0cfc33-1acd-4a95-a843-27d8f7b95a11","source_url":"https://fireworks.ai/blog/kimi-k3-fireworks","title":"Kimi K3 Fireworks","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"fireworks-ai","name":"Fireworks AI","category":"neocloud"},"occurred_at":"2026-07-27T00:00:00.000Z","first_seen_at":"2026-10-23T04:00:51.142751+00:00","date_source":"page.visible_date"},{"id":"d819fda5-b54d-4377-88ff-e8c47607ff19","url":"https://onlylabs.fyi/signals/d819fda5-b54d-4377-88ff-e8c47607ff19","source_url":"https://fireworks.ai/blog/train-muse-glimmer-for-free","title":"Train Muse Glimmer For Free","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"fireworks-ai","name":"Fireworks AI","category":"neocloud"},"occurred_at":"2026-01-04T00:00:00.000Z","first_seen_at":"2026-10-22T00:00:53.86356+00:00","date_source":"page.visible_date"},{"id":"8499c519-f14f-4647-a3cd-fb96809aa6f3","url":"https://onlylabs.fyi/signals/8499c519-f14f-4647-a3cd-fb96809aa6f3","source_url":"https://fireworks.ai/blog/custom-model-import-h100-on-demand-deployments","title":"Custom Model Import H100 On Demand Deployments","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"fireworks-ai","name":"Fireworks AI","category":"neocloud"},"occurred_at":"2024-06-03T00:00:00.000Z","first_seen_at":"2026-10-23T04:00:51.142751+00:00","date_source":"page.visible_date"},{"id":"bb945a31-1d4e-49f9-8375-1931d997bd52","url":"https://onlylabs.fyi/signals/bb945a31-1d4e-49f9-8375-1931d997bd52","source_url":"https://fireworks.ai/blog/dedicated-deployments-postpaid-billing-update","title":"Dedicated Deployments Postpaid Billing Update","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"fireworks-ai","name":"Fireworks AI","category":"neocloud"},"occurred_at":"2024-03-01T00:00:00.000Z","first_seen_at":"2026-10-23T04:00:51.142751+00:00","date_source":"page.visible_date"},{"id":"6810ea52-70e2-4144-a589-d9456733e826","url":"https://onlylabs.fyi/signals/6810ea52-70e2-4144-a589-d9456733e826","source_url":"https://fireworks.ai/blog/firefunction-v1-function-calling-model","title":"Firefunction V1 Function Calling Model","context":null,"kind":{"key":"post_published","label":"Writing"},"org":{"slug":"fireworks-ai","name":"Fireworks AI","category":"neocloud"},"occurred_at":"2024-02-20T00:00:00.000Z","first_seen_at":"2026-10-23T04:00:51.142751+00:00","date_source":"page.visible_date"}]}