GPT-5.4 Nano · GPT-5.4 Mini · GPT-5.4 · GPT-5.5
OpenAI model family
Use OpenAI GPT across three generations in one workspace.
Vizify currently lists seven GPT chat variants spanning the 5.4, 5.5, and 5.6 generations. GPT-5.4 Mini is the account-wide default chat model, and this page opens it directly, while Nano, GPT-5.4, GPT-5.5, Luna, Terra, and Sol stay one explicit switch away.
Seven GPT variants across the 5.4, 5.5, and 5.6 generations GPT-5.4 Mini is the account-wide default chat model in Vizify GPT-5.4 Nano, GPT-5.4 Mini, and GPT-5.6 Luna are in the Basic catalog GPT-5.4, GPT-5.5, GPT-5.6 Terra, and GPT-5.6 Sol are in the Paid catalog All seven are marked for text and image input GPT-5.6 variants add a sixth reasoning-effort step not present on 5.4 or 5.5
Verified catalog facts
What Vizify exposes for this model family.
These facts are generated from the current public catalog, not copied from provider marketing.
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Chat
Reviewed 2026-08-16
Where this family fits.
Starting a general chat on GPT-5.4 Mini, the account-wide default model
Trying GPT-5.4 Nano as the lightest Basic-tier variant
Moving to GPT-5.4, GPT-5.5, GPT-5.6 Terra, or GPT-5.6 Sol when Paid-model access is enabled
Requests that combine text with a screenshot, diagram, or other uploaded image on any GPT variant
Choosing the extra minimal reasoning-effort step on Luna, Terra, or Sol when even low feels heavier than needed
Keeping GPT model choice explicit when switching between later requests
What not to assume.
Vizify does not run multiple GPT variants in parallel for one request
GPT-5.4, GPT-5.5, GPT-5.6 Terra, and GPT-5.6 Sol require current Paid-model entitlement
GPT-5.4 Nano, GPT-5.4 Mini, GPT-5.4, and GPT-5.5 expose five reasoning-effort steps (off through xhigh); only the GPT-5.6 variants add a sixth, minimal, step
This page does not claim external benchmark leadership or permanent performance differences between generations
Three generations, two tiers
Vizify currently exposes seven GPT chat variants across three generations: 5.4 (Nano, Mini, and the unnumbered GPT-5.4), 5.5, and 5.6 (Luna, Terra, and Sol). GPT-5.4 Nano, GPT-5.4 Mini, and GPT-5.6 Luna are listed in the Basic catalog; GPT-5.4, GPT-5.5, GPT-5.6 Terra, and GPT-5.6 Sol are listed in the Paid catalog. The page keeps that distinction explicit rather than presenting one ambiguous “GPT” button. The 5.6 generation has a dedicated page at /models/gpt-5-6/ covering Luna, Terra, and Sol in detail; this page documents the 5.4 and 5.5 line and how the three generations relate.
GPT-5.4 Mini is the account default — Luna is not
GPT-5.4 Mini currently holds a status none of the other six variants share: it is the account-wide default chat model in the Vizify app profile. GPT-5.6 Luna sits in the same Basic tier as Nano and Mini, but it is not the default — an earlier version of this page’s predecessor incorrectly implied that Luna was, and this page corrects that. The primary action above opens GPT-5.4 Mini directly as a one-time launch selection; the App still validates catalog and account access before use.
Reasoning effort: five steps become six in GPT-5.6
GPT-5.4 Nano, GPT-5.4 Mini, GPT-5.4, and GPT-5.5 share the same reasoning-effort range: off, low, medium, high, and xhigh, with medium as the default. GPT-5.6 Luna, Terra, and Sol expose one additional step, minimal, positioned between off and low, so the 5.6 generation currently offers six reasoning-effort steps rather than five. Check the model picker in Vizify for the exact range that applies to the variant you choose.
Text and image input across the family
All seven current GPT chat variants are included in the Vizify vision list, so the customer App can pass a supported image upload along with the request after it validates file and account requirements. This page does not imply that every chat model in the broader Vizify catalog shares the same input support.
Capability review
Availability, tier, default status, and input support were checked against the Vizify repository and app profile on 2026-08-16. The demand-validated keyword in this family, “gpt 5.6”, is owned by the dedicated /models/gpt-5-6/ page; this maker overview is published on capability evidence, and the 2026-07-30 research package predates GPT-5.4 Nano, GPT-5.4 Mini, GPT-5.4, and GPT-5.5 as distinct search terms. Provider benchmarks, external release status, pricing, and performance rankings are outside this page’s factual contract.
FAQ
Questions about OpenAI GPT models in Vizify.
Which OpenAI GPT variants are available in Vizify?
The current Vizify catalog includes seven GPT chat variants: GPT-5.4 Nano, GPT-5.4 Mini, GPT-5.4, GPT-5.5, GPT-5.6 Luna, GPT-5.6 Terra, and GPT-5.6 Sol. Nano, Mini, and Luna are in the Basic tier; GPT-5.4, GPT-5.5, Terra, and Sol are in the Paid tier.
Which GPT model does this page open?
The primary action opens Vizify with GPT-5.4 Mini as a one-time launch selection. The App validates that model against its live catalog before use.
Is GPT-5.4 Mini the default model in Vizify?
Yes. GPT-5.4 Mini is the account-wide default chat model in the current Vizify app profile — the only GPT variant, and the only model in the wider catalog, that currently holds that status.
Is GPT-5.6 Luna the default model in Vizify?
No. GPT-5.6 Luna is listed in the Basic tier alongside GPT-5.4 Nano and GPT-5.4 Mini, but the account-wide default chat model in the current app profile is GPT-5.4 Mini, not Luna.
Can these GPT models accept an uploaded image in Vizify?
Yes. All seven current GPT chat variants — Nano, Mini, GPT-5.4, GPT-5.5, Luna, Terra, and Sol — are currently marked for text and image input in the Vizify app profile. Upload handling and model access are still validated by the App.
Are GPT-5.6 Terra and Sol in the Basic tier?
No. The current customer catalog lists GPT-5.6 Terra and GPT-5.6 Sol in the Paid tier, so the App checks Paid-model entitlement before sending a request. GPT-5.6 Luna is the only Basic-tier variant in the 5.6 generation.
What changes with reasoning effort in the GPT-5.6 generation?
GPT-5.4 Nano, GPT-5.4 Mini, GPT-5.4, and GPT-5.5 offer five reasoning-effort steps: off, low, medium, high, and xhigh, with medium as the default. GPT-5.6 Luna, Terra, and Sol add a sixth step, minimal, sitting between off and low.
Does Vizify run several GPT variants on the same request?
No. Vizify selects one model for each request. You can switch GPT variants between requests, but this page does not promise parallel answers or automatic comparison.