AI Model Cost Comparison — Up to 5 Models Side by Side
Compare up to 5 LLM models side by side — GPT-4o, Claude, Gemini, Llama, Mistral, DeepSeek and 450+ more. See daily/monthly cost, input/output rates, context windows, and which model saves the most for your usage.
How to Compare LLM Costs
Different LLM models can vary by 100x in price for the same task. This tool lets you pick up to 5 models simultaneously and compare them side by side on cost, context window, and input/output rates.
How to Use
Type in the search box and click a model to add it (up to 5).
Set your prompt tokens, output tokens, and daily request volume.
The table updates live — green values are the best (lowest cost or largest context) in each row.
The banner highlights the cheapest model overall and how much it saves vs the most expensive option you selected.
Common Comparisons
GPT-4o vs Claude 3.5 Sonnet vs Gemini 1.5 Pro: All frontier models with similar quality. Gemini 1.5 Pro is often the cheapest of the three; Claude and GPT-4o trade off depending on prompt vs output ratio.
Premium vs Open Source: Compare GPT-4o against Llama 3.1 70B, Mistral Large, or DeepSeek V2 to see the cost difference. Open models often cost 5–20x less for similar quality on many tasks.
Free tier check: Add free-tier models alongside paid ones to see if zero-cost options are viable for your volume (they cap around 200 requests/day).
Frequently Asked Questions
You can compare up to 5 models simultaneously. Add them by typing in the search box and clicking a result. Remove any model with the × button on its tag.
Pricing is fetched from the OpenRouter public API at site build time. It covers 456+ models and was last updated Oct 29, 2026.
Green bold values indicate the best option in that row — lowest cost for price rows, or largest for context window.
This row shows how much you would save per month compared to the most expensive model you have selected. The baseline (most expensive) shows 'baseline' and all others show the monthly saving.
Yes. Free models (price = $0.00) are fully supported in comparison. They will show 'Free' for cost rows. Note that free endpoints have rate limits (≈20 req/min or 200/day) and are not suitable for high-volume production.