Muse Spark Open

meta/muse-spark-open

Maker: Meta, United States
Released: 2026-10-15
Knowledge cutoff: 2026-01-04
Family: muse
Weights: open
Tasks: text.chat, text.reasoning, code, vision.understand, vision.extract
Cheapest offering: Fireworks AI, about $0.002525 for a typical text.chat call

Try it in the sandbox Use it from the API

Offerings

Provider	Model id at the provider	Status	Price per 1M tokens	Per-unit prices	Limits	Capabilities (level)
Fireworks AI	`accounts/fireworks/models/muse-spark-open`	ga	Input: $1.25 Output: $4.25 Cache read: $0.15 Input, priority tier: $1.875 Output, priority tier: $6.375 Cache read, priority tier: $0.225 Since 2026-11-03 · models.dev, MIT	none	Context: 1,048,576 tokens Max output: 131,072 tokens	`input.text` claimed `input.image` claimed `input.pdf` claimed `output.text` claimed `tools` claimed `structured_output` claimed `reasoning` claimed
OpenRouter	`meta/muse-spark-open`	ga	Input: $1.25 Output: $4.25 Cache read: $0.15 Since 2026-11-03 · models.dev, MIT	none	Context: 1,048,576 tokens Max output: 943,718 tokens	`input.text` claimed `input.image` claimed `input.pdf` claimed `input.audio` claimed `input.video` claimed `output.text` claimed `tools` claimed `structured_output` claimed `reasoning` claimed
Together AI	`meta-models/Muse-Spark-Open-816B-A42B`	ga	Input: $1.25 Output: $4.25 Cache read: $0.15 Since 2026-11-03 · models.dev, MIT	none	Context: 1,048,576 tokens Max output: 131,072 tokens	`input.text` claimed `input.image` claimed `input.video` claimed `input.pdf` claimed `output.text` claimed `tools` claimed `structured_output` claimed `reasoning` claimed `prompt_caching` claimed

Quality scores

Basis	Score (0–1)	Raw	Measured	Source
`epoch:gpqa_diamond`	0.919	0.8857	2026-10-15	Epoch AI, CC-BY-4.0, normalized by Nanner Tech
`curated`	0.800 (estimated)	0.8000	2026-11-02	Curated tier (estimated), Nanner Tech
`epoch:frontiermath`	0.745	0.6982	2026-10-15	Epoch AI, CC-BY-4.0, normalized by Nanner Tech

Aliases

Other names the API accepts for this model.

accounts/fireworks/models/muse-spark-open
meta-models/muse-spark-open-816b-a42b

Use it from the API

Look this model up, or ask for the best model for its task on the providers that offer it. See the quickstart and the API reference.

Look up this model

curl 'https://rhumbdata.com/v1/models/meta/muse-spark-open' \
  -H "Authorization: Bearer $RHUMB_KEY"

Resolve text.chat on its providers

curl 'https://rhumbdata.com/v1/resolve?task=text.chat&providers=fireworks,openrouter,together' \
  -H "Authorization: Bearer $RHUMB_KEY"

Built from catalog version 2026-11-04.3 of 2026-11-04. Prices are list prices per 1M tokens unless marked otherwise; every score shows its source's notice (see Attributions).