Muse Spark Open
by MetaChat
Muse Spark Open is an 816B total / 42B active open-weight multimodal reasoning model from Meta for coding and long-horizon agentic work, with 1M-token context.
- Context
- 1.05M tokens
- Max output
- 262,144 tokens
- Released
- 2026-10-15
- Weights
- Open
meta/muse-spark-open · also seen as accounts/fireworks/models/muse-spark-open, meta-models/muse-spark-open, meta-models/Muse-Spark-Open-816B-A42B, nebius/meta-models/muse-spark-open, +2 more
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- 2026-10-15
- Weights
- Open
- Input
- Text, Image, Video, Audio
- Output
- Text
- Context window
- 1,048,576 max across endpoints
- Max output
- 262,144
- Providers
- 8 + 8 gateways, not counted as providers
- Epoch Capabilities Index
- not evaluated
- Direct price range
- $1.25–$1.56 in · $4.25–$5.31 out per 1M tokens · across all 8 providers
More details
- Last updated
- 2026-10-15
- Knowledge cutoff
- 2026-01-04
- Developer country
- United States of America
Capabilities
Across all endpoints: supported if any endpoint supports it.
- Tool calling
- Parallel toolsunknown
- Structured output
- Reasoning
- Image input
- PDF input
- Audio input
- Audio outputunknown
- Video input
- Prompt caching
- Web searchunknown
- Computer useunknown
- System messagesunknown
- Assistant prefillunknown
- Temperature
- Streamingunknown
- Attachments
Endpoints
One row per provider and variant; gateways are listed separately.
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Price history
Atom feedNo change since 19 Oct 2026. The cheapest direct price has been $1.25 in / $4.25 out per 1M tokens at Baseten on every data refresh since then.
Tracked from 19 Oct 2026, the earliest refresh this model's headline price can be rebuilt from. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON
Cost calculator
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Similarly priced models
Blended rate per 1M tokens, each at its own cheapest provider (10M input : 2M output mix).
| Model | Blended/1M | In/1M | Out/1M | Context | vs Muse Spark Open |
|---|---|---|---|---|---|
| Muse Spark 1.1Meta | $1.75 | $1.25 | $4.25 | 1.05M | +0% |
| Muse Spark 1.2 ContributorMeta | $1.75 | $1.25 | $4.25 | 1.05M | +0% |
| Muse Spark 1.3Meta | $1.75 | $1.25 | $4.25 | 1.05M | +0% |
| DeepSeek V4 Pro 0423DeepSeek | $1.76 | $1.32 | $3.96 | 1M | +1% |
| QVQ MaxAlibaba (Qwen) | $1.80 | $1.20 | $4.80 | 131K | +3% |
| Qwen3 Max PreviewAlibaba (Qwen) | $1.70 | $1.08 | $4.80 | 258K | −3% cheaper |
| Cogito v1 Preview Qwen 32BDeep Cogito | $1.80 | $1.80 | $1.80 | 131K | +3% |
| Nano Banana ProGoogle | $1.83 | $1.00 | $6.00 | 65.5K | +5% |
More from Meta
Newest Meta models in the catalogue. All Meta models
| Model | Released | Context | Listed price |
|---|---|---|---|
| Muse Wonder | 2026-10-12 | 1.05M | from $4.00 |
| Muse Wonder | 2026-10-12 | 1.05M | from $4.00 |
| Muse Voice Transcribe 1.0 | 2026-09-11 | — | unpriced |
| Muse Spark 1.3 | 2026-09-02 | 1.05M | from $1.25 |
| Muse Spark 1.3 Contributor | 2026-09-02 | 1.05M | from $0.10 |
| Muse Image 1.0 | 2026-08-26 | — | unpriced |
| Muse Image | 2026-08-26 | 65.5K | unpriced |
| Muse Glimmer 30B | 2026-08-10 | 131K | from $0.20 |