SpaceXAI: Grok 4.6

This release moved nothing a buyer pays for. In the catalog, as observed on 31 August 2026, this row and x-ai/grok-4.5 listed the same context window — 500000tokensopenrouter-models, last checked 2026-09-24 there against 500000tokensopenrouter-models, last checked 2026-09-24 here — the same input price, $2.00per million tokensopenrouter-models, last checked 2026-09-24 against $2.00per million tokensopenrouter-models, last checked 2026-09-24, and the same output price, $6.00per million tokensopenrouter-models, last checked 2026-09-24 against $6.00per million tokensopenrouter-models, last checked 2026-09-24.

The envelope moved a release earlier, and so did the reasoning settings this row is often credited with. x-ai/grok-4.3 listed 1000000tokensopenrouter-models, last checked 2026-09-24 of context at $1.25per million tokensopenrouter-models, last checked 2026-09-24 input, and read falseopenrouter-models, last checked 2026-09-24 for reasoning.mandatory at an effort of lowopenrouter-models, last checked 2026-09-24; this row reads trueopenrouter-models, last checked 2026-09-24 at highopenrouter-models, last checked 2026-09-24. Grok 4.5 is where that flipped — in the same snapshot it already carries this row's pair, along with the halved window and the raised price — and the only reasoning difference left between the two is an extra xhigh effort tier here. Anyone dating the end of optional reasoning to 2026-08-12source, accessed 2026-08-28 is a month late.