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.
1M1M
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.
$1.25—
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.
$4.25—
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.
$1.25Meta—
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input.
$4.25Meta—
$463Meta list price—
These models have no shared benchmark scores.
Overview
CompanyMetaSpaceXSI
Release dateJul 9 2026Feb 17 2025
AccessClosedClosed
Model detailsView modelView model

Frequently asked questions

Muse Spark 1.1 and Grok 3 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only Muse Spark 1.1 has a verified first-party API price: $1.25 per million input tokens and $4.25 per million output tokens. No pay-as-you-go API rate is tracked for Grok 3. Grok 3 shipped 507 days before Muse Spark 1.1, so benchmark comparisons should account for the intervening progress.

Context windows are 1M (Muse Spark 1.1) vs 1M (Grok 3).

Direct benchmark comparisons are unavailable — Muse Spark 1.1 and Grok 3 don't publish scores on any of the same benchmarks.