Compare AI models

Specifications
Context window
1.05M—
API pricing
Input price
$10.00—
Output price
$50.00—
Cached input price
$1.00—
Cheapest input
$5.00OpenAI—
Cheapest output
$25.00OpenAI—

These models have no shared benchmark scores.

Overview
CompanyOpenAISpaceXAI
Release dateSep 3 2026Feb 17 2025
AccessClosedClosed
Model detailsView modelView model

Frequently asked questions

GPT-6 Astra and Grok 3 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only GPT-6 Astra has a verified first-party API price: $10.00 per million input tokens and $50.00 per million output tokens. No pay-as-you-go API rate is tracked for Grok 3. Grok 3 shipped 563 days before GPT-6 Astra, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

Direct benchmark comparisons are unavailable — GPT-6 Astra and Grok 3 don't publish scores on any of the same benchmarks.