--- title: "fusion - Model Details & Comparison" description: "fusion from OpenRouter: capabilities, context limits, pricing, and side-by-side comparisons with alternative models." url: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/openrouter/fusion" markdown: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/openrouter/fusion.md" --- # fusion - Model Details & Comparison > fusion from OpenRouter: capabilities, context limits, pricing, and side-by-side comparisons with alternative models. ## Important Links - [View MCP Gateway](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/resources/mcp-gateway.md) - [Features](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/#features) - [Enterprise](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/enterprise) - [Pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/pricing.md) - [Docs](https://docs.getbifrost.ai) - [GitHub](https://github.com/maximhq/bifrost) - [Book a Demo](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/book-a-demo) ## About fusion fusion is a chat model from OpenRouter. Its 1,000K-token context window is in the top 15% among chat models. ## Specifications - **OpenRouter Provider.** - **Chat Mode.** - **1,000,000 Max Input Tokens.** - **1,000,000 Max Tokens.** - **$-1000000.0000 / 1M tokens Input Price.** - **$-1000000.0000 / 1M tokens Output Price.** ## fusion Pricing Overview fusion is a chat model from OpenRouter, its 1,000K-token context window places it in the top 15% of chat models. ## Models to Compare Alternatives to fusion with comparable capabilities. | Model | Provider | Input $/1M | Output $/1M | | --- | --- | --- | --- | | ai21.j2-mid-v1 | AWS Bedrock | $12.50 | $12.50 | | ai21.j2-ultra-v1 | AWS Bedrock | $18.80 | $18.80 | | ai21.jamba-1-5-large-v1:0 | AWS Bedrock | $2.00 | $8.00 | | ai21.jamba-1-5-mini-v1:0 | AWS Bedrock | $0.20 | $0.40 | | ai21.jamba-instruct-v1:0 | AWS Bedrock | $0.50 | $0.70 | - [Compare ai21.j2-mid-v1](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/bedrock/ai21.j2-mid-v1.md) - [Compare ai21.j2-ultra-v1](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/bedrock/ai21.j2-ultra-v1.md) - [Compare ai21.jamba-1-5-large-v1:0](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/bedrock/ai21.jamba-1-5-large-v1-0.md) - [Compare ai21.jamba-1-5-mini-v1:0](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/bedrock/ai21.jamba-1-5-mini-v1-0.md) - [Compare ai21.jamba-instruct-v1:0](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/bedrock/ai21.jamba-instruct-v1-0.md) ## Related Resources - [Calculate fusion costs](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/openrouter/model/fusion.md) - [Check OpenRouter status](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/provider-status/openrouter.md) - [All OpenRouter pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/openrouter.md) ## FAQ ### Is fusion cheaper than ai21.j2-mid-v1? Yes. fusion costs $-1000000.0000 per 1M input tokens compared to ai21.j2-mid-v1's $12.50 per 1M input tokens. Both are chat models. ### What are the best alternatives to fusion? The most comparable chat models to fusion are: ai21.j2-mid-v1 from AWS Bedrock ($12.50/1M input tokens); ai21.j2-ultra-v1 from AWS Bedrock ($18.80/1M input tokens); ai21.jamba-1-5-large-v1:0 from AWS Bedrock ($2.00/1M input tokens); ai21.jamba-1-5-mini-v1:0 from AWS Bedrock ($0.20/1M 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 fusion's context window? fusion supports up to 1,000,000 input tokens, placing it in the top 15% of chat models by context window size (rank 362 of 2653). 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 fusion costs? fusion 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 $-1000000.0000 and generating 1M output tokens costs $-1000000.0000. ## Related Resources - [OpenRouter models](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/provider/openrouter.md) - [Model library](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library.md) - [LLM cost calculator](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator.md) - [Docs: Bifrost docs](https://docs.getbifrost.ai) - [GitHub: maximhq/bifrost](https://github.com/maximhq/bifrost) - [Pricing: Bifrost pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/pricing.md) - [Enterprise: Bifrost enterprise](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/enterprise) - [Book a Demo: Bifrost demo](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/book-a-demo) - [Resources: Bifrost resources](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/resources.md) --- *This is a markdown version of [https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/openrouter/fusion](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/openrouter/fusion) for AI/LLM consumption.*