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  1. Home
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  3. Alternatives to GPT-5.6 Luna on OpenRouter
GPT-5.6 Luna on OpenRouter

Best Alternatives to GPT-5.6 Luna on OpenRouter

LLM APIs · 8 alternatives ranked of 23 in the category

Looking for alternatives to GPT-5.6 Luna on OpenRouter? These are the llm apis tools that score highest on adoption, reviews, benchmarks, and public code, with what separates each one from GPT-5.6 Luna on OpenRouter.

Claude Code Router logo
Claude Code Router

LLM APIs· github.com

Open source

Open-source router for Claude Code that lets builders route coding-agent requests across OpenAI-compatible model providers and custom backends.

How each alternative differs from GPT-5.6 Luna on OpenRouter

Ranked by adoption, review, benchmark, and repository signals. Each note below is drawn from the two products’ own catalog records, so a product with nothing to separate it from GPT-5.6 Luna on OpenRouter carries no note.

  1. 1

    Claude Code Router

    Claude Code Router is listed as open source, while GPT-5.6 Luna on OpenRouter is not, can be tried on a open source plan before you commit budget, and has a public repository with 37k stars.

  2. 2

    Z.ai GLM 5.2 on OpenRouter

    Z.ai GLM 5.2 on OpenRouter is listed as open source, while GPT-5.6 Luna on OpenRouter is not and has a public repository with 6.4k stars.

  3. 3

    Cloudflare AI Gateway

    Cloudflare AI Gateway can be tried on a freemium plan before you commit budget and has a public repository with 1.2k stars.

  4. 4

    LLMRouter

    LLMRouter is listed as open source, while GPT-5.6 Luna on OpenRouter is not, can be tried on a open source plan before you commit budget, and has a public repository with 2.1k stars.

  5. 5

    NVIDIA NIM LLM APIs

Frequently asked questions

What is the closest alternative to GPT-5.6 Luna on OpenRouter?

Claude Code Router ranks highest among the alternatives to GPT-5.6 Luna on OpenRouter we track. Claude Code Router is listed as open source, while GPT-5.6 Luna on OpenRouter is not, can be tried on a open source plan before you commit budget, and has a public repository with 37k stars. Open-source router for Claude Code that lets builders route coding-agent requests across OpenAI-compatible model providers and custom backends.

Is there an open-source alternative to GPT-5.6 Luna on OpenRouter?

Yes. Claude Code Router, Z.ai GLM 5.2 on OpenRouter, LLMRouter, fal, and Millwright are listed as open source in our catalog. GPT-5.6 Luna on OpenRouter is not listed as open source. Claude Code Router is the highest ranked of them: Open-source router for Claude Code that lets builders route coding-agent requests across OpenAI-compatible model providers and custom backends.

Are there free alternatives to GPT-5.6 Luna on OpenRouter?

Claude Code Router (open source), Cloudflare AI Gateway (freemium), LLMRouter (open source), NVIDIA NIM LLM APIs (freemium), fal (freemium), and Millwright (open source) offer a no-cost entry point, where GPT-5.6 Luna on OpenRouter is paid.

37,257
Open source
Z.ai GLM 5.2 on OpenRouter logo
Z.ai GLM 5.2 on OpenRouter

LLM APIs· openrouter.ai

Commercial

OpenRouter-hosted Z.ai GLM 5.2 model for long-horizon agent workflows and project-scale coding, with 1M-token model context, reasoning controls, tool calling, and structured outputs.

6,430
Open source
Cloudflare AI Gateway logo
Cloudflare AI Gateway

LLM APIs· cloudflare.com

Freemium

Cloudflare control plane for multi-provider AI routing, caching, rate limiting, observability, and fallback.

1,163
API available
LLMRouter logo
LLMRouter

LLM APIs· ulab-uiuc.github.io

Open source

Open-source intelligent LLM routing library with single-round, multi-round, personalized, and agentic routers plus CLI, training, evaluation, and OpenAI-compatible serving.

2,148
Open source
NVIDIA NIM LLM APIs logo
NVIDIA NIM LLM APIs

LLM APIs· developer.nvidia.com

Freemium

NVIDIA-hosted and self-deployable NIM large language model APIs exposing OpenAI-compatible inference endpoints for RAG, agentic AI, and production generative applications.

254
API available
Cerebras Inference logo
Cerebras Inference

LLM APIs· cerebras.ai

Commercial

High-speed hosted inference API and SDKs for running Cerebras-supported language models in builder applications.

167
API available
fal logo
fal

LLM APIs· fal.ai

Freemium

Serverless generative media API platform for running image, video, and audio models from builder applications.

184
Open source
Millwright logo
Millwright

LLM APIs· github.com

Open source

Open-source Rust LLM router for deterministic policy, cache affinity, provider health, and spend control across OpenAI-compatible, Anthropic, and Amazon Bedrock endpoints.

26
Open source

NVIDIA NIM LLM APIs can be tried on a freemium plan before you commit budget and has a public repository with 254 stars.

  • 6

    Cerebras Inference

    Cerebras Inference has a public repository with 167 stars.

  • 7

    fal

    fal is listed as open source, while GPT-5.6 Luna on OpenRouter is not, can be tried on a freemium plan before you commit budget, and has a public repository with 184 stars.

  • 8

    Millwright

    Millwright is listed as open source, while GPT-5.6 Luna on OpenRouter is not, can be tried on a open source plan before you commit budget, and has a public repository with 26 stars.