What models does Amp’s new ChatGPT-linked subscription actually includ

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Answer from Aug 25

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Direct links

A Dial for You - Amp ampcode.com

The answer then

Linking a ChatGPT subscription to Amp covers Amp’s low, medium, and high Dial workflows, using OpenAI models:

Amp mode/function	Included model
Low main agent	GPT-5.6 Terra
Medium main agent	GPT-5.6 Sol
High main agent	GPT-5.6 Sol with extra-high reasoning
High oracle	GPT-5.6 Sol with high reasoning
Thread reader	GPT-5.6 Terra
Code review	GPT-5.6 Terra

These uses are charged against the linked ChatGPT subscription rather than Amp credits, subject to the limits of that ChatGPT plan.[1]

What it doesn’t include is Amp’s ultra mode, which continues to use Claude Fable and consumes Amp credits. It also does not automatically include Amp’s other provider/model options, such as GLM, Grok, or Kimi.[1]

In short: the ChatGPT link gives Amp’s Terra- and Sol-powered low/medium/high workflows, but not the top-tier ultra workflow or unlimited access beyond the linked subscription’s limits.[1][2]

Sources

History

How strongly the models agree, per check. Filled points mark checks that changed the answer.

Sep 29
The answer changed

The old consensus stated that High dial and Oracle use GPT-6 Astra. The new consensus reverses this, stating that Low uses GPT-5.6 Terra, Medium uses GPT-5.6 Sol, and High uses GPT-5.6 Sol, while acknowledging GPT-6 Astra as a future or changing documentation name. This is a material shift in specific model assignments.
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Sep 22
The answer changed

The routing models have fundamentally shifted. The old consensus stated that ChatGPT linking covers GPT-5.6 Terra and GPT-5.6 Sol, while Ultra and others are excluded. The new consensus updates this to include GPT-6 Astra for High-mode and Oracle roles (depending on the ChatGPT tier), replacing the older GPT-5.6 assignments for those tiers.
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Sep 1 – Sep 15 3 checks, no change
- Sep 15 Read this version
- Sep 8 Read this version
- Sep 1 Read this version
Aug 25
The answer changed

The exact model routing breakdown substantially changed: Low main agent shifted from GLM-5.2 to GPT-5.6 Terra, High oracle shifted from Claude Fable 5 to GPT-5.6 Sol, and Code review shifted from GPT-5.5 to GPT-5.6 Terra. Additionally, the new answer specifies that Low/Med/High workflows are covered, while Ultra mode uses Claude Fable and Amp credits.
Shown above
Aug 18
The answer changed

The breakdown of model assignments per routing mode changed significantly. Low mode changed from GPT-5.6 Terra to GLM-5.2 + GPT-5.6 Sol; High mode oracle changed from GPT-5.6 Sol to Claude Fable 5; Review changed from GPT-5.6 Terra to GPT-5.5; and specific routes for Puck/Search and Librarian were added while general routing details were updated.
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Aug 4 – Aug 11 2 checks, no change
- Aug 11same answer, new wording Read this version
- Aug 4 Read this version
Jul 28, 2026
Watch started

The first answer. Every later check is compared with it.
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How the 2 models compared

OpenAI GPT-5.6 Luna · Google Gemini Gemini 3.7 Flash

The models broadly agree; no notable differences.