Compare AI models

Specifications
ParametersThe learned values that shape how a model responds. B means billion and T means trillion. For mixture-of-experts models, the total count is larger than the number active for each token. Parameter count alone does not measure quality.
—128B
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider.
—256k
API pricingUSD per 1M tokens · lower wins
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
—$1.50
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
—$7.50
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
—$0.15
Cheapest inputLowest input rate across every provider on OpenRouter, the lab included. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page.
—$1.50Mistral
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input.
—$7.50Mistral
—$675Mistral list price
These models have no shared benchmark scores.
Overview
CompanyGoogleMistral
Release dateOct 28 2026Apr 29 2026
AccessClosedOpen Weight
Model detailsView modelView model

Frequently asked questions

Gemini 4 Carbon and Mistral Medium 3.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only Mistral Medium 3.5 has a verified first-party price for an available API: $1.50 per million input tokens and $7.50 per million output tokens. No currently available pay-as-you-go API rate is tracked for Gemini 4 Carbon. Mistral Medium 3.5 shipped 182 days before Gemini 4 Carbon, so benchmark comparisons should account for the intervening progress.

Gemini 4 Carbon is closed, while Mistral Medium 3.5 is open weight.

Direct benchmark comparisons are unavailable — Gemini 4 Carbon and Mistral Medium 3.5 don't publish scores on any of the same benchmarks.