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GPT-6 Astra vs Grok 4.6

Facts only. This page does not pick a winner. For a picked winner, see the use case comparison on Tools.

GPT-6 AstraGrok 4.6
API model IDsgpt-6-astragrok-4.6
Context window1,050,000500,000
Lifecycleactiveactive
Licenseproprietaryproprietary
Trains on API dataNoNo
Zero data retentionon-requestyes
Input per 1M tokens$10 (verified 2026-09-08)$2 (verified 2026-09-08)