Release-note comparison

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Field

xAI

Grok 4.5

16 Jul 2026

xAI

Grok 4.6

12 Aug 2026

LifecycleGenerally available since 16 Jul 2026Announced since 12 Aug 2026

ImpactMajorNeeds review

Change typeDeveloper capabilityModel launch

Capability shiftGeneral · CodingSuccessor model announced; exact capability deltas are not yet published in an indexed model card.

AvailabilityAPI + Grok BuildRelease announced by SpaceXAI on X; exact product and API availability should be verified against xAI docs.

Access statusStatus: Tracked · Channel: API · Weights: Closed · Pricing: Known · Docs: SourceStatus: Needs check · Channel: API · Weights: Closed · Pricing: Unclear · Docs: Pending

Pricing signal$2 / $6 per 1MNo pricing change found in the indexed note.

Context signalNo context-window change found in the indexed note.No context-window change found in the indexed note.

ConfidenceInferredNeeds review

Developer capabilityInferred

Grok 4.5

ImpactMajor

LifecycleGA

Since 16 Jul 2026

ContextunknownAccessAPIWeightsclosedPrice$2 / $6 per 1MCheckInferred

Availability

StatusTrackedChannelAPIWeightsClosedPricingKnownDocsSource

Source qualityLaunch announcementFirst-party source · 1 receipt

Pairs deep software-engineering ability with an advertised serving speed of 80 tokens per second.

Open radar brief Source

Model launchNeeds review

Grok 4.6

ImpactNeeds review

LifecycleAnnounced

Announced 12 Aug 2026

ContextunknownAccessAPIWeightsclosedPriceunknownCheckreview

Availability

StatusNeeds checkChannelAPIWeightsClosedPricingUnclearDocsPending

Keeps xAI’s rapid frontier-model cadence visible while full model-card, benchmark and pricing details remain to be verified.

Open radar brief Source