--- title: "muse-spark-open - Model Details & Comparison" description: "muse-spark-open from OpenRouter: capabilities, context limits, pricing, and side-by-side comparisons with alternative models." url: "https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/muse-spark-open" markdown: "https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/muse-spark-open.md" --- # muse-spark-open - Model Details & Comparison > muse-spark-open from OpenRouter: capabilities, context limits, pricing, and side-by-side comparisons with alternative models. ## Important Links - [View MCP Gateway](https://www.getmaxim.ai/resources/mcp-gateway.md) - [Features](https://www.getmaxim.ai/bifrost/#features) - [Enterprise](https://www.getmaxim.ai/enterprise) - [Pricing](https://www.getmaxim.ai/pricing.md) - [Docs](https://docs.getbifrost.ai) - [GitHub](https://github.com/maximhq/bifrost) - [Book a Demo](https://www.getmaxim.ai/book-a-demo) ## About muse-spark-open muse-spark-open is a chat model from OpenRouter, one of 491 chat models they offer. It is priced at $1.25 per 1M input tokens and $4.25 per 1M output tokens, ranking 2776 out of 4042 chat models by cost and cheaper than 31% of models in this category. muse-spark-open supports vision, function calling, reasoning, audio input, prompt caching, structured output. Its 1,049K-token context window is in the top 15% among chat models. ## Specifications - **OpenRouter Provider.** - **Chat Mode.** - **1,048,576 Max Input Tokens.** - **943,718 Max Output Tokens.** - **943,718 Max Tokens.** - **$1.25 / 1M tokens Input Price.** - **$4.25 / 1M tokens Output Price.** ## Capabilities muse-spark-open supports: Function Calling, Vision, Reasoning, Audio Input, Prompt Caching, Response Schema, Tool Choice, PDF Input. ## muse-spark-open Pricing Overview At $1.25 per 1M input tokens and $4.25 per 1M output tokens, muse-spark-open ranks 2776 out of 4042 chat models by input cost. It is more expensive compared to the median of $0.60 for chat models, and is cheaper than 31% of models in this category. muse-spark-open is one of 491 OpenRouter chat models, with support for vision, function calling, reasoning, audio input, prompt caching, structured output. its 1,049K-token context window places it in the top 15% of chat models. ## Models to Compare Alternatives to muse-spark-open with comparable capabilities. | Model | Provider | Input $/1M | Output $/1M | | --- | --- | --- | --- | | gemini-2.5-pro | Vertex AI | $1.25 | $10.00 | | gemini-3.5-flash | Vertex AI | $1.50 | $9.00 | | gemini-2.5-pro | Google Gemini | $1.25 | $10.00 | | gemini-3.5-flash | Google Gemini | $1.50 | $9.00 | | gemini-robotics-er-2-preview | Vertex AI | $1.00 | $5.00 | - [Compare gemini-2.5-pro](https://www.getmaxim.ai/bifrost/model-library/compare/vertex_ai/gemini-2.5-pro.md) - [Compare gemini-3.5-flash](https://www.getmaxim.ai/bifrost/model-library/compare/vertex_ai/gemini-3.5-flash.md) - [Compare gemini-2.5-pro](https://www.getmaxim.ai/bifrost/model-library/compare/gemini/gemini-2.5-pro.md) - [Compare gemini-3.5-flash](https://www.getmaxim.ai/bifrost/model-library/compare/gemini/gemini-3.5-flash.md) - [Compare gemini-robotics-er-2-preview](https://www.getmaxim.ai/bifrost/model-library/compare/vertex_ai/gemini-robotics-er-2-preview.md) ## Related Resources - [Calculate muse-spark-open costs](https://www.getmaxim.ai/bifrost/llm-cost-calculator/provider/openrouter/model/muse-spark-open.md) - [Check OpenRouter status](https://www.getmaxim.ai/bifrost/provider-status/openrouter.md) - [All OpenRouter pricing](https://www.getmaxim.ai/bifrost/llm-cost-calculator/provider/openrouter.md) ## FAQ ### Is muse-spark-open cheaper than gemini-2.5-pro? No. muse-spark-open costs $1.25 per 1M input tokens while gemini-2.5-pro costs $1.25 per 1M input tokens, making gemini-2.5-pro 0% more affordable for input. However, muse-spark-open may offer different capabilities or performance characteristics that justify the price difference. ### How does muse-spark-open pricing compare to the average chat model? muse-spark-open input pricing is $1.25 per 1M tokens, which is 108% above the median of $0.60 for chat models. It ranks 2776 out of 4042 chat models by input cost, making it cheaper than 31% of models in this category. For output, it costs $4.25 per 1M tokens compared to the median of $1.80. ### What makes muse-spark-open different from other OpenRouter models? Among OpenRouter's 491 chat models, muse-spark-open ranks 304 by input cost. ### What are the best alternatives to muse-spark-open? The most comparable chat models to muse-spark-open are: gemini-2.5-pro from Vertex AI ($1.25/1M input tokens); gemini-3.5-flash from Vertex AI ($1.50/1M input tokens); gemini-2.5-pro from Google Gemini ($1.25/1M input tokens); gemini-3.5-flash from Google Gemini ($1.50/1M input tokens). These alternatives were selected based on similar capabilities, pricing, and provider diversity. You can compare any of these models in detail using the Bifrost Model Library. ### How large is muse-spark-open's context window? muse-spark-open supports up to 1,048,576 input tokens, placing it in the top 15% of chat models by context window size (rank 440 of 4003). This makes it suitable for processing long documents, extensive code repositories, or maintaining detailed conversation histories. ### How do I check if OpenRouter is down? You can monitor OpenRouter service health in real time on the Bifrost OpenRouter Status page. It tracks current component status, active incidents, and historical reliability data pulled from the official status page every 60 seconds. ### How do I calculate muse-spark-open costs? muse-spark-open is priced based on input and output tokens. Use the interactive calculator at the top of this page to estimate costs for your specific workload. Enter your expected input and output tokens volume and the calculator will show the total cost breakdown. For reference, processing 1M input tokens costs $1.25 and generating 1M output tokens costs $4.25. ## Related Resources - [Model library](https://www.getmaxim.ai/bifrost/model-library.md) - [LLM cost calculator](https://www.getmaxim.ai/bifrost/llm-cost-calculator.md) - [Docs: Bifrost docs](https://docs.getbifrost.ai) - [GitHub: maximhq/bifrost](https://github.com/maximhq/bifrost) - [Pricing: Bifrost pricing](https://www.getmaxim.ai/pricing.md) - [Enterprise: Bifrost enterprise](https://www.getmaxim.ai/enterprise) - [Book a Demo: Bifrost demo](https://www.getmaxim.ai/book-a-demo) - [Resources: Bifrost resources](https://www.getmaxim.ai/resources.md) --- *This is a markdown version of [https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/muse-spark-open](https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/muse-spark-open) for AI/LLM consumption.*