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.
—816B
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.
—1M
API pricingUSD per 1M tokens · lower wins
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.
—$1.25BaseTen
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input.
—$4.25BaseTen
—$463Modal
These models have no shared benchmark scores.
Overview
CompanyGoogleMeta
Release dateOct 28 2026Oct 15 2026
AccessClosedOpen Weight
Model detailsView modelView model

Frequently asked questions

Gemini 4 Carbon and Muse Spark Open don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Muse Spark Open shipped 13 days before Gemini 4 Carbon, so benchmark comparisons should account for the intervening progress.

Gemini 4 Carbon is closed, while Muse Spark Open is open weight.

Direct benchmark comparisons are unavailable — Gemini 4 Carbon and Muse Spark Open don't publish scores on any of the same benchmarks.