---
title: "gpt-5.6-luna - Model Details & Comparison"
description: "gpt-5.6-luna 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/gpt-5.6-luna"
markdown: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/openrouter/gpt-5.6-luna.md"
---

# gpt-5.6-luna - Model Details & Comparison

> gpt-5.6-luna 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 gpt-5.6-luna

gpt-5.6-luna is a chat model from OpenRouter, one of 357 chat models they offer. It is priced at $0.50 per 1M input tokens and $3.00 per 1M output tokens, ranking 1327 out of 2669 chat models by cost and cheaper than 50% of models in this category. gpt-5.6-luna supports vision, function calling, reasoning, prompt caching, structured output. Its 1,050K-token context window is in the top 3% among chat models.

## Specifications

- **OpenRouter Provider.**
- **Chat Mode.**
- **1,050,000 Max Input Tokens.**
- **128,000 Max Output Tokens.**
- **128,000 Max Tokens.**
- **$0.50 / 1M tokens Input Price.**
- **$3.00 / 1M tokens Output Price.**

## Capabilities

gpt-5.6-luna supports: Function Calling, Vision, Reasoning, Prompt Caching, Response Schema, Tool Choice, PDF Input.

## gpt-5.6-luna Pricing Overview

At $0.50 per 1M input tokens and $3.00 per 1M output tokens, gpt-5.6-luna ranks 1327 out of 2669 chat models by input cost. It is competitively priced compared to the median of $0.50 for chat models, and is cheaper than 50% of models in this category.

gpt-5.6-luna is one of 357 OpenRouter chat models, with support for vision, function calling, reasoning, prompt caching, structured output. its 1,050K-token context window places it in the top 3% of chat models.

## Models to Compare

Alternatives to gpt-5.6-luna with comparable capabilities.

| Model | Provider | Input $/1M | Output $/1M |
| --- | --- | --- | --- |
| gemini-3-flash-preview | Vertex AI | $0.50 | $3.00 |
| gemini-3-flash-preview | Google Gemini | $0.50 | $3.00 |
| kimi-k2.5 | Moonshot | $0.60 | $3.00 |
| gpt-4.1-mini | Azure | $0.40 | $1.60 |
| gpt-4.1-mini-2025-04-14 | Azure | $0.40 | $1.60 |

- [Compare gemini-3-flash-preview](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/vertex_ai/gemini-3-flash-preview.md)
- [Compare gemini-3-flash-preview](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/gemini/gemini-3-flash-preview.md)
- [Compare kimi-k2.5](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/moonshot/kimi-k2.5.md)
- [Compare gpt-4.1-mini](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/azure/gpt-4.1-mini.md)
- [Compare gpt-4.1-mini-2025-04-14](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/azure/gpt-4.1-mini-2025-04-14.md)

## Related Resources

- [Calculate gpt-5.6-luna costs](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/openrouter/model/gpt-5.6-luna.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 gpt-5.6-luna cheaper than gemini-3-flash-preview?

No. gpt-5.6-luna costs $0.50 per 1M input tokens while gemini-3-flash-preview costs $0.50 per 1M input tokens, making gemini-3-flash-preview 0% more affordable for input. However, gpt-5.6-luna may offer different capabilities or performance characteristics that justify the price difference.

### How does gpt-5.6-luna pricing compare to the average chat model?

gpt-5.6-luna input pricing is $0.50 per 1M tokens, which is 0% at the median of $0.50 for chat models. It ranks 1327 out of 2669 chat models by input cost, making it cheaper than 50% of models in this category. For output, it costs $3.00 per 1M tokens compared to the median of $1.44.

### What makes gpt-5.6-luna different from other OpenRouter models?

Among OpenRouter's 357 chat models, gpt-5.6-luna ranks 178 by input cost.

### What are the best alternatives to gpt-5.6-luna?

The most comparable chat models to gpt-5.6-luna are: gemini-3-flash-preview from Vertex AI ($0.50/1M input tokens); gemini-3-flash-preview from Google Gemini ($0.50/1M input tokens); kimi-k2.5 from Moonshot ($0.60/1M input tokens); gpt-4.1-mini from Azure ($0.40/1M 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 gpt-5.6-luna's context window?

gpt-5.6-luna supports up to 1,050,000 input tokens, placing it in the top 3% of chat models by context window size (rank 65 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 gpt-5.6-luna costs?

gpt-5.6-luna 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 $0.50 and generating 1M output tokens costs $3.00.

## 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/gpt-5.6-luna](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/openrouter/gpt-5.6-luna) for AI/LLM consumption.*