Breaking

OpenAI Documents Show No GPT-6 Sol Release as Astra Remains the Listed GPT-6 Model

September 22, 2026 at 10:43 EDT

Foundation Models
AI Agents
Software Dev & Coding

OpenAI's public model catalog and ChatGPT help pages do not list a model called GPT-6 Sol, despite developer speculation that a lower-cost GPT-6 tier could follow GPT-6 Astra. The official lineup instead shows GPT-6 Astra as the GPT-6 flagship and keeps Sol in the GPT-5.6 family as gpt-5.6-sol.

September 22, 2026 · OpenAI

No Official GPT-6 Sol

OpenAI's public lineup lists GPT-6 Astra as the GPT-6 flagship while Sol remains documented as GPT-5.6 Sol. The gap has made pricing and availability the practical story.

$50

GPT-6 Astra output per MTok

$20

GPT-5.6 Sol output per MTok

1.05M

Context window for both

Output price comparison

$20

GPT-5.6 Sol

$50

GPT-6 Astra

Each block represents $10 per million output tokens; Astra is 2.5x Sol's output price.

Why developers want it

A cheaper GPT-6 tier would fit routine coding and agent work where Astra's capability is useful but its cost and limits matter.

What is documented

OpenAI has published Astra as `gpt-6-astra` and Sol as `gpt-5.6-sol`; no GPT-6 Sol model ID is listed.

Official lineup snapshot

GPT-6 Astra->GPT-5.6 Sol->GPT-5.6 Terra->GPT-5.6 Luna

The documented product map points users toward Astra for the hardest work and GPT-5.6 tiers for lower-cost workloads.

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