Model overview
--- **Authors**: Meta Superintelligence Labs **Model Release Date:** October 2026 **License**: Muse Model License Muse Spark Open is an 816B total/42B active parameter open weights model with a context window of 1M tokens. Built for coding and agentic work, Muse Spark Open is natively multimodal. This open weights version has additional safety post-training to make it more robust against misuse as a standalone model without system guardrails. We recommend deploying Muse Spark Open as part of a broader AI system, with additional guardrails suited to the specific use case. 1. **Multi-Step Reasoning** \- chains reasoning over long horizons, sustaining coherent plans across complex, extended workflows. 2. **End to End Agentic Task Completion** \- multi-step planning, sequential tool invocation, failure recovery, and long-horizon task execution, working within scaffolds, write and debug code, and resolve multi-turn requests from start to finish. 3. **Coding Agents** \- writing, debugging, and resolving real-world software engineering tasks. 4. **Tool Use** \- tool invocation across extended multi-turn workflows, diagnosing error and retrying with tool call failures 5. **Multimodal Reasoning** \- interpreting screenshots, charts, documents, images, audio and video recordings, alongside conversation for agentic and information-rich environments. 6. **Synthetic Data Generation** \- generating high-quality training data for downstream model development. 7. **LLM-as-a-judge Evaluation** \- serving as an evaluator for other models' outputs.
Key features
特点摘要待依据来源补齐，不凭模型名称推断能力。
Limitations & considerations
Sources are insufficient to establish specific limitations. Verify task performance, latency, data policies, licensing and version lifecycle.
Source prices & cost analysis
Prices vary by channel, region and configuration. Channel quotes are listed independently and are not treated as a single official provider price.
| Source / channel | Input | Output | Billing unit | Collected at |
|---|---|---|---|---|
| No verified prices yet. Check the source channel. | ||||
Estimate monthly base token costs
Estimates exclude cache discounts, tiered pricing, multimodal surcharges, web search, taxes and additional reasoning output.
Public benchmarks & run configuration
暂无已采集的可核验公开评分。模型未上榜不代表能力较低。
View full indexed rankings →Frequently asked questions
Do open weights permit free commercial use?
Not necessarily. Check the version license, commercial conditions and usage policies. Self-hosting incurs compute and maintenance costs.
Are these real-time billing prices?
These are timestamped source snapshots, not live billing prices. Check the channel for current versions, regions, discounts and billing methods.
Sources & traceability
许可证：other。模型介绍与第三方评测均以原来源的具体版本和方法为准。