--- title: "s1 - Model Details & Comparison" description: "s1 from OpenRouter: capabilities, context limits, pricing, and side-by-side comparisons with alternative models." url: "https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/s1" markdown: "https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/s1.md" --- # s1 - Model Details & Comparison > s1 from OpenRouter: capabilities, context limits, pricing, and side-by-side comparisons with alternative models. ## Important Links - [View MCP Gateway](https://www.getmaxim.ai/bifrost/resources/mcp-gateway.md) - [Features](https://www.getmaxim.ai/bifrost/#features) - [Enterprise](https://www.getmaxim.ai/enterprise) - [Pricing](https://www.getmaxim.ai/pricing) - [Docs](https://docs.getbifrost.ai) - [GitHub](https://github.com/maximhq/bifrost) - [Book a Demo](https://www.getmaxim.ai/book-a-demo) ## About s1 s1 is a chat model from OpenRouter, one of 444 chat models they offer. It is priced at $15.00 per 1M input tokens, ranking 2875 out of 2924 chat models by cost and cheaper than 1% of models in this category. It accepts up to 0K input tokens. ## Specifications - **OpenRouter Provider.** - **Chat Mode.** - **0 Max Input Tokens.** - **0 Max Tokens.** - **$15.00 / 1M tokens Input Price.** ## s1 Pricing Overview At $15.00 per 1M input tokens, s1 ranks 2875 out of 2924 chat models by input cost. It is more expensive compared to the median of $0.55 for chat models, and is cheaper than 1% of models in this category. ## Models to Compare Alternatives to s1 with comparable capabilities. | Model | Provider | Input $/1M | Output $/1M | | --- | --- | --- | --- | | ai21.j2-mid-v1 | AWS Bedrock | $12.50 | $12.50 | | anthropic.claude-3-opus-20240229-v1:0 | AWS Bedrock | $15.00 | $75.00 | | anthropic.claude-opus-4-1-20250805-v1:0 | AWS Bedrock | $15.00 | $75.00 | | anthropic.claude-opus-4-20250514-v1:0 | AWS Bedrock | $15.00 | $75.00 | | claude-opus-4-1 | Azure | $15.00 | $75.00 | - [Compare ai21.j2-mid-v1](https://www.getmaxim.ai/bifrost/model-library/compare/bedrock/ai21.j2-mid-v1.md) - [Compare anthropic.claude-3-opus-20240229-v1:0](https://www.getmaxim.ai/bifrost/model-library/compare/bedrock/anthropic.claude-3-opus-20240229-v1-0.md) - [Compare anthropic.claude-opus-4-1-20250805-v1:0](https://www.getmaxim.ai/bifrost/model-library/compare/bedrock/anthropic.claude-opus-4-1-20250805-v1-0.md) - [Compare anthropic.claude-opus-4-20250514-v1:0](https://www.getmaxim.ai/bifrost/model-library/compare/bedrock/anthropic.claude-opus-4-20250514-v1-0.md) - [Compare claude-opus-4-1](https://www.getmaxim.ai/bifrost/model-library/compare/azure/claude-opus-4-1.md) ## Related Resources - [Calculate s1 costs](https://www.getmaxim.ai/bifrost/llm-cost-calculator/provider/openrouter/model/s1.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 s1 cheaper than ai21.j2-mid-v1? No. s1 costs $15.00 per 1M input tokens while ai21.j2-mid-v1 costs $12.50 per 1M input tokens, making ai21.j2-mid-v1 17% more affordable for input. However, s1 may offer different capabilities or performance characteristics that justify the price difference. ### How does s1 pricing compare to the average chat model? s1 input pricing is $15.00 per 1M tokens, which is 2627% above the median of $0.55 for chat models. It ranks 2875 out of 2924 chat models by input cost, making it cheaper than 1% of models in this category. ### What makes s1 different from other OpenRouter models? Among OpenRouter's 444 chat models, s1 ranks 418 by input cost. ### What are the best alternatives to s1? The most comparable chat models to s1 are: ai21.j2-mid-v1 from AWS Bedrock ($12.50/1M input tokens); anthropic.claude-3-opus-20240229-v1:0 from AWS Bedrock ($15.00/1M input tokens); anthropic.claude-opus-4-1-20250805-v1:0 from AWS Bedrock ($15.00/1M input tokens); anthropic.claude-opus-4-20250514-v1:0 from AWS Bedrock ($15.00/1M 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 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 s1 costs? s1 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. ## Related Resources - [OpenRouter models](https://www.getmaxim.ai/bifrost/model-library/provider/openrouter.md) - [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) - [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/bifrost/resources.md) --- *This is a markdown version of [https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/s1](https://www.getmaxim.ai/bifrost/model-library/compare/openrouter/s1) for AI/LLM consumption.*