Updated March 10, 2026
Inworld Router is an LLM router with conditional routing, A/B testing, and built-in TTS across 220+ models, billed at provider rates with no markup.
Martian is an intelligent model router that automatically selects the best LLM for each request based on the prompt content, required capabilities, and cost constraints. Using proprietary routing models, Martian optimizes for quality and cost simultaneously, helping teams reduce LLM spend while maintaining or improving output quality.
Core capabilities each platform advertises.
InWorld AIWhat each tool does well, and the limitations to keep in mind.
InWorld AIPros
Cons
Pros
Cons
Choose InWorld AI if you wantChoose if you want
Choose Martian if you wantChoose if you want
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 1,000+ models through one gateway.
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