Release-note comparison

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Field

OpenAI

GPT-5.6

09 Jul 2026

OpenAI

GPT-6 Astra

03 Sept 2026

LifecycleGenerally available since 09 Jul 2026Generally available since 03 Sept 2026

ImpactMajorMajor

Change typeCapability expansionCapability expansion

Capability shiftGeneral · Coding · MultimodalGeneral · Coding · Multimodal

AvailabilityAPI + ChatGPTAPI + OpenAI products

Access statusStatus: Tracked · Channel: API · Weights: Closed · Pricing: Unclear · Docs: SourceStatus: Tracked · Channel: API · Weights: Closed · Pricing: Known · Docs: Source

Pricing signalNo pricing change found in the indexed note.1.05M · $10 / $50

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

ConfidenceInferredConfirmed

Capability expansionInferred

GPT-5.6

ImpactMajor

LifecycleGA

Since 09 Jul 2026

ContextunknownAccessAPIWeightsclosedPriceunknownCheckInferred

Availability

StatusTrackedChannelAPIWeightsClosedPricingUnclearDocsSource

Source qualityLaunch announcementFirst-party source · 1 receipt

Brings stronger multi-agent work and programmatic tool coordination across ChatGPT, Codex and the API.

Open radar brief Source

Capability expansionConfirmed

GPT-6 Astra

ImpactMajor

LifecycleGA

Since 03 Sept 2026

ContextunknownAccessAPIWeightsclosedPrice$10 / $50CheckConfirmed

Availability

StatusTrackedChannelAPIWeightsClosedPricingKnownDocsSource

Source qualityLaunch announcementVerified source · 1 receipt

Establishes the top GPT-6 capability tier with a million-token context window.

Open radar brief Source