# Muse Spark 1.3 Contributor [Canonical model page](https://headlessthrones.com/models/muse-spark-1-3-contributor) · [Model library](https://headlessthrones.com/models) Public catalog reference from Headless Thrones. Exact catalog ID: `muse-spark-1-3-contributor`. Catalog source-check date: 2026-10-23. This brief contains the public catalog answers and any catalog guide, not private drafts, historical editorial revisions or independently measured rankings. The canonical HTML page may also display separately published editorial. Current catalog answers ## What to know about Muse Spark 1.3 Contributor AI-compiled from linked model documentation. This is a catalog reference, not an independent performance review. Catalog checked October 23, 2026. [Access](https://headlessthrones.com/models/muse-spark-1-3-contributor#model-answer-access) · [Exact model](https://headlessthrones.com/models/muse-spark-1-3-contributor#model-answer-identity) · [Pricing](https://headlessthrones.com/models/muse-spark-1-3-contributor#model-answer-pricing) · [Token limits](https://headlessthrones.com/models/muse-spark-1-3-contributor#model-answer-context) · [Inputs & outputs](https://headlessthrones.com/models/muse-spark-1-3-contributor#model-answer-modalities) · [Model details](https://headlessthrones.com/models/muse-spark-1-3-contributor#model-answer-research) ### How can you access Muse Spark 1.3 Contributor? The catalog documents **API** access for Muse Spark 1.3 Contributor. [Source](https://dev.meta.ai/docs/models) As of the catalog check, this version was listed as available. [Source](https://dev.meta.ai/docs/models) For API use, confirm the exact model identifier, your account and region, and the endpoint's current limits in the linked documentation. An API listing does not establish access through a consumer subscription. ### Which Muse Spark 1.3 Contributor does this page describe? Muse Spark 1.3 Contributor is a model record from **Meta** in the Muse Spark family. [Source](https://dev.meta.ai/docs/models) The recorded model identifier or checkpoint is `muse-spark-1.3-contributor`. Use that exact identifier when checking documentation or a provider listing. [Source](https://dev.meta.ai/docs/models) ### How much does Muse Spark 1.3 Contributor cost? The recorded token rates for Muse Spark 1.3 Contributor are: - **Input:** US$0.1 per 1 million input tokens. [Source](https://dev.meta.ai/docs/pricing-rate-limits) - **Output:** US$0.2 per 1 million output tokens. [Source](https://dev.meta.ai/docs/pricing-rate-limits) **Rate conditions:** Contributor mode direct Meta API prices in USD per million uncached input/output tokens. Cached input is $0.002 per million. No long-context premium; web search is an additional $2.50 per 1,000 queries. Muse Code subscriptions are a separate product. [Source](https://dev.meta.ai/docs/pricing-rate-limits) **Illustrative arithmetic:** 10,000 input tokens plus 2,000 output tokens would cost US$0.0014 at those recorded rates. This assumes every token is billed at the displayed rate and excludes any cache, batch, tool, storage or tier adjustments; it is not a quote or measured usage. Check the source's pricing conditions before budgeting. A token rate does not state the price of an app subscription or the full cost of running downloaded weights. ### What are Muse Spark 1.3 Contributor's context and output limits? The documented **context window is 1,048,576 tokens**. [Source](https://dev.meta.ai/docs/models) A separate maximum-output value is not established in this record. The context or input figure should not be used as an output allowance. Context, input and output limits describe different constraints. Do not add the figures together to infer a larger window. Check the endpoint's accounting for conversation history, system instructions, tools, media and generated tokens; a documented maximum is not a guarantee of answer quality or a measured usable capacity. ### What can Muse Spark 1.3 Contributor receive and generate? Documented inputs: **text, image, video, audio, and pdf**. [Source](https://dev.meta.ai/docs/models) Documented outputs: **text**. [Source](https://dev.meta.ai/docs/models) Input support and output generation are separate capabilities. Reading an image does not establish image generation; a text output listing does not establish speech output. File sizes, formats and media limits depend on the documented implementation. ### What distinguishes Muse Spark 1.3 Contributor? These details come from the linked publisher material for this model. Reported capabilities and training descriptions are publisher statements, not independent test results. **Contributor data policy**: Contributor Mode can use submitted content to improve future Meta models in exchange for lower pricing. This differs from Standard Mode; choose the mode according to your data policy. [Source](https://dev.meta.ai/docs/models) **Audio limitation**: The model guide says audio understanding is not fully supported in Muse Spark 1.3 and recommends Muse Spark 1.2 for audio-sensitive use. [Source](https://dev.meta.ai/docs/models) **Reasoning restriction**: The max reasoning-effort setting is unavailable in Muse Spark 1.3 Contributor Mode. [Source](https://dev.meta.ai/docs/models) **Team rate-limit scope**: The listed limit for muse-spark-1.3-contributor is 150 requests and 3,000,000 tokens per minute. Limits apply across all API keys in one team, separately for each model; adding another key does not create another allowance. [Source](https://dev.meta.ai/docs/pricing-rate-limits) **Catalog qualifications:** Audio input is not fully supported; vendor warns quality may be degraded. Contributor mode permits vendor training on submitted content under its terms; not interchangeable with Standard privacy settings. **Evidence still missing here:** knowledge and training-data cutoffs. Missing documentation is not evidence that a feature is unavailable. Headless Thrones has not independently benchmarked this model for this reference. Evaluate it on representative work before choosing it; these facts do not rank its accuracy, reliability, speed or suitability against another model. Keep the exact version in view ## Other Muse Spark models from Meta. These are separate records in the same publisher family. A shared family name does not establish equal capabilities or interchangeable licenses. ### [Muse Spark 1.1](https://headlessthrones.com/models/muse-spark-1-1) API · 1,048,576 context tokens ### [Muse Spark 1.2](https://headlessthrones.com/models/muse-spark-1-2) API · 1,048,576 context tokens ### [Muse Spark 1.2 Contributor](https://headlessthrones.com/models/muse-spark-1-2-contributor) API · 1,048,576 context tokens ### [Muse Spark 1.3](https://headlessthrones.com/models/muse-spark-1-3) API · 1,048,576 context tokens ### [Muse Spark Open 816B A42B](https://headlessthrones.com/models/muse-spark-open-816b-a42b) Open weights · 1,048,576 context tokens