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.
1M200k
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.
—$150.00
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.
—$600.00
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$150.00OpenAI
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input.
$4.25Meta$600.00OpenAI
$463Meta$60,000OpenAI list price
These models have no shared benchmark scores.
Overview
CompanyMetaOpenAI
Release dateSep 2 2026Mar 19 2025
AccessClosedClosed
Model detailsView modelView model

Frequently asked questions

Muse Spark 1.3 and o1-pro don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only o1-pro has a verified first-party API price: $150.00 per million input tokens and $600.00 per million output tokens. No pay-as-you-go API rate is tracked for Muse Spark 1.3. o1-pro shipped 532 days before Muse Spark 1.3, so benchmark comparisons should account for the intervening progress.

Context windows are 1M (Muse Spark 1.3) vs 200k (o1-pro).

Direct benchmark comparisons are unavailable — Muse Spark 1.3 and o1-pro don't publish scores on any of the same benchmarks.