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What is a Cosmic Router?

Cosmic Routers are agentic routers that take coding to the next level. They intelligently select the best model for every request — giving better outcomes at faster speeds with lower costs. And they work inside of the apps you already use and love. Different models are good at different things, and Cosmic Routers unlock that potential across ecosystems.

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How do Cosmic Routers work?

First, every request is individually analyzed Costa deeply analyzes a request before sending it to a model. It chooses the best model for the request based on:
  1. 🔀 type — semantic analysis of task (coding, planning, documenting, etc…)
  2. 🏎️💨 speed — the latest response times and model output speed ( and )
  3. 🏔️ complexity — is this an easy or difficult task
Then, every request is individually secured Every request is filtered (often redacted) for security before it is sent to a model. The results are then unredacted, the result is analyzed for security, and it is passed back to the user. This all happens in real time and faster than the speed of inference.

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Why secure requests?

Cosmic Routers combine the performance of using frontier models for complex tasks with the security and cost advantages of low-cost open-weight models. But this also increases your attack surface. Without careful safeguards, routing across multiple models is dangerous. Cosmic Routers are built to close security gaps by securing every request end-to-end. We call this Zero Trust AI.

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How powerful is Cosmic Routing?

The latest research shows that adaptive routing can match the strongest models’ accuracy while cutting costs by over 25%, or deliver 90% of peak performance at more than 60% lower cost. With Cosmic Routers, those savings aren’t just theoretical—we pass them along directly to you. And we do it all securely. Every routing decision happens inside Costa’s zero-trust infrastructure, ensuring requests and responses remain private, protected, and compliant. Just doing a random coin flip on each request between two of the latest models increases the SWEBench score by more than 3%. Cosmic Routers raise SWEBench scores of the underlying models while costing an order of magnitude less — and those improvements are shared across all of your coding agents.

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Which Cosmic Router should I choose?

Costa offers multiple Cosmic Routers that all work slightly differently. In order to help you choose the best Cosmic Router for each task, we provide a model card, which is sort of like a nutrition label but for AI:
💫 Orbit
costa/orbit
SWEBench: 72.1

Models Included:

    vertex/claude-opus-4.6

    vertex/claude-sonnet-4.5

    vertex/claude-haiku-4.5

    openai/gpt-5.2-codex

    openai/gpt-5-mini

    openai/gpt-4.1

    vertex/gemini-3-flash

    vertex/gemini-3-pro

    vertex/qwen3-coder

    vertex/glm-4.7

    vertex/kimi-k2

Last Changed 2026-02-06

Stability: 🛰️ Stable

Pricing Tier: ✨ Cosmic

💫 Nebula
costa/nebula
SWEBench: 75.9

Models Included:

    vertex/claude-opus-4.6

    vertex/claude-4.5-sonnet

    vertex/gemini-3-pro

    openai/gpt-5.2-codex

    vertex/qwen3-coder

    vertex/glm-4.7

Last Changed 2026-02-06

Stability: 🛰️ Stable

Pricing Tier: ✨ Cosmic

The model card lets you know which models may be called, what problems the Cosmic Router is designed to solve, and how often you can expect it to change. Because there are so many agentic coding tools, and most of them are constantly changing, we are always tuning Cosmic Routers to work well with the latest models and techniques.

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Cosmic Routing means lower cost to you

💫 Costa Orbit is almost as powerful as Claude Sonnet 4.5 / Gemini 3-pro…
… and because of Costa’s Zero Trust AI, we are able to offer 💫 Costa Orbit at 1/20th of the price of Claude Sonnet 4 and 1/5th of GPT-5 mini: