Compare AI models

Specifications
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.
200k1M
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.
—$0.047Morph
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input.
—$1.00Inceptron
—$65.80Relace
These models have no shared benchmark scores.
Overview
CompanyAnthropicZ.ai
Release dateMar 4 2024Aug 14 2026
AccessClosedOpen Weight
Model detailsView modelView model

Frequently asked questions

Claude 3 Sonnet and GLM-5.3 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 3 Sonnet shipped 893 days before GLM-5.3, so benchmark comparisons should account for the intervening progress.

Context windows are 200k (Claude 3 Sonnet) vs 1M (GLM-5.3). Claude 3 Sonnet is closed, while GLM-5.3 is open weight.

Direct benchmark comparisons are unavailable — Claude 3 Sonnet and GLM-5.3 don't publish scores on any of the same benchmarks.