Free.ai launches Model Compare for side-by-side AI model testing
Compare 27 models like GPT-5 and Claude Opus 4.6 with one prompt.
Free.ai has launched Model Compare, a free tool that lets you test any two AI models side by side using the same prompt. It covers 27 models across three tiers: self-hosted (e.g., Qwen 3 30B, Mistral 7B at ~100 tokens/msg), standard (GPT-4.1 Mini, Gemini 2.5 Flash, Llama 4 at ~150–900 tokens/msg), and premium (GPT-5, Claude Sonnet/Opus 4.6, Grok 4 at ~1K–10K tokens/msg). You can mix and match tiers freely — for example, compare a free Qwen model against GPT-5 to decide if the extra cost is worth it. Each model maintains its own multi-turn conversation history, so you can see how they handle complex follow-ups. Token costs are shown per response, and comparisons are saved automatically (up to 20) in your browser.
Model Compare is designed for developers, researchers, and power users who want to make informed choices without committing to a subscription. It's free to start with 2,500 tokens/day (signup boosts to 30,000/day). Unlike Free.ai's AI Arena (which is blind and builds an ELO leaderboard), Model Compare is fully transparent — you pick the models and see every response. Popular comparisons include GPT-4.1 vs Claude Sonnet 4.6 for writing, GPT-5 vs Gemini 2.5 Pro for flagship reasoning, and DeepSeek R1 vs o4 Mini for reasoning models. The tool also integrates with Free.ai's 400+ other AI tools for further experimentation.
- Test any two of 27 models with the same prompt and see results side by side.
- Free tier gives 2,500 tokens/day; signup unlocks 30,000 tokens/day.
- Supports multi-turn conversations with separate history for each model.
Why It Matters
Lets teams benchmark model performance and costs before investing in premium APIs or subscriptions.