AI Model Comparison

Compare AI models side by side

Compare GPT, Claude, Gemini, and 200+ models on the same prompt. See output quality, latency, and cost in one view.

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Challenge

AI model comparison shouldn't be guesswork

Benchmarks don't tell the full story. Finding the best model requires comparing outputs on your actual tasks.

Hard to Compare Outputs

Every model responds differently. Without side-by-side comparison, you're guessing which model fits your use case best.

Cost vs Quality Trade-offs

Frontier models are expensive. Smaller models are cheaper but sometimes worse. You need to see the difference before committing.

Too Many Models to Track

New models ship weekly. Keeping up with which model is best for what task is a full-time job without tooling.

Vendor Lock-in Risk

Building on a single provider means you can't switch when a better or cheaper model launches. Multi-model access removes that risk.

The Opper Way

One prompt, every model, compare and choose

Compare model outputs on your actual tasks. See quality, latency, and cost side by side, then route to the best model through a single API.

Side-by-Side Comparison

Try the playground, compare models instantly

Send any prompt to multiple models and see results side by side. Output quality, response time, and token cost in a single view.

  • Compare 3+ models on the same prompt
  • See response time and cost per request
  • Works with text, vision, audio, and embeddings
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200+ Models

Compare GPT, Claude, Gemini, and 200+ models through one API

Access models from OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, and more. Full support for streaming, function calling, structured output, and context windows up to 1M+ tokens. OpenAI SDK compatible.

  • Streaming, function calling, and structured output
  • 13+ providers including EU-hosted options
  • Switch models with a single parameter change
Learn more about the LLM Gateway
Cost Optimization

Find the cheapest AI model that works

Many tasks don't need frontier models. Compare a $15/M token model against a $0.10/M model on your actual prompts.

  • Token cost shown per response
  • Identify when smaller models match frontier quality
  • Route to the most cost-effective model automatically
See model benchmarks on real tasks
How comparing AI models cut agent costs by 98.6%

Case Study

How comparing AI models cut agent costs by 98.6%

By comparing model performance on real tasks using Opper, we identified that smaller models with context engineering matched frontier model quality at a fraction of the cost.

Ready to compare AI models side by side?

Compare GPT, Claude, Gemini, and 200+ models side by side on your actual tasks.

Try the playground See all models