Arena AI alternatives

Tools that do what Arena AI does, found by what they say they do rather than by shelf. Among the equally alike, the most used come first. Each line says how it differs from Arena AI.

Read 2026-10-16

With a free plan or free to use: OpenRouter, WhatLLM.org, Humanloop, Ollama LLM Throughput Benchmark, Chat LLM, flatkey.ai, Fireworks AI.

10 alternativesUnlike Arena AI

#1
OpenRouter LLM operations
Routes API requests to 500 language models across 80 providers through a unified interface.
Free plan
224k
Active
From $5.50/mo
2023
#2
WhatLLM.org LLM operations
Ranks and compares language models by quality benchmarks, pricing, and speed across providers.
Free planAlso: Analytics
2.5k
Active
Free
#3
Humanloop LLM operations
Humanloop has joined Anthropic and is sunsetting its platform.
Free plan
3.6k
Maintained
Free plan
#4
Ollama LLM Throughput Benchmark LLM operations
Benchmarks language model throughput across different hardware and configurations.
Free planOpen source
141
Active
Open source
#5
The Multivac LLM operations
Evaluates frontier AI models by having them score each other's responses across structured rubrics without human judges.
Open source
41 linking domains
#6
NVIDIA LLM operations MCP · sign-in
Designs GPUs and AI computing platforms for data centers, gaming, and embedded systems.
More widely usedAround longer, since 1993
12.6M
Active
From ≈ $402 once
1993
#7
Chat LLM LLM operations
Access 395 AI language models including GPT, Claude, and Gemini through a free web chat interface.
Free planAlso: Chat assistant
37
Active
From $5/mo
2024
#8
flatkey.ai LLM operations
Routes requests across 100+ AI models and 1000+ tools through a single API key and unified billing.
Free plan
38
Active
From $10/mo
#9
Fireworks AI LLM operations
Routes requests to open or closed language models and trains specialized models on your data.
Free planAlso: Fine-tuning, RAG
8.7k
Active
From $0.01 per use
#10
What LLM Can I Run LLM operations
Ranks local language models by real benchmarks for your GPU hardware and memory constraints.
Also: Analytics, Search
1
Maintained

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How this list is made: the words Arena AI is described with (what it does, for whom, what it is used for) are matched against every tool in the Atlas. A tool on the same shelf, or doing the same kind of work, counts for a little more. Nothing here is paid for.