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.
—320B
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.
128k1M
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.
—$0.0163Relace
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input.
—$0.0355OpenInference
—$5.22OpenInference · fp4
These models have no shared benchmark scores.
Overview
CompanySpaceXSIZ.ai
Release dateAug 13 2024Aug 26 2026
AccessClosedOpen Weight
Model detailsView modelView model

Frequently asked questions

Grok‑2 and GLM-5.3-Flash don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok‑2 shipped 743 days before GLM-5.3-Flash, so benchmark comparisons should account for the intervening progress.

Context windows are 128k (Grok‑2) vs 1M (GLM-5.3-Flash). Grok‑2 is closed, while GLM-5.3-Flash is open weight.

Direct benchmark comparisons are unavailable — Grok‑2 and GLM-5.3-Flash don't publish scores on any of the same benchmarks.