GPT-5.4 Nano · GPT-5.4 Mini · GPT-5.4 · GPT-5.5 · GPT-6 Luna · GPT-6 Luna Fast · GPT-6 Sol · GPT-6 Sol Fast · GPT-6 Astra · GPT-6 Astra Fast
OpenAI model family
Use OpenAI GPT from GPT-5.4 to GPT-6 in one workspace.
Vizify lists thirteen GPT chat variants across the 5.4, 5.5, 5.6, and 6 generations. GPT-6 is the newest: Luna, Sol, and Astra, each with a Fast variant. GPT-5.4 Mini stays the account-wide default, and this page opens it directly.
GPT-6 Luna, Sol, and Astra are the newest OpenAI models in Vizify, each with a Fast variant GPT-5.4 Mini is the account-wide default and the only Basic chat model Every other GPT variant, including all six GPT-6 models, requires paid access All thirteen GPT variants are marked for text and image input GPT-6 Astra is the only GPT model whose reasoning cannot be switched off Fast variants cost twice the credits per token of their standard counterparts
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 2026-09-26
Where this family fits.
Starting a general chat on GPT-5.4 Mini as an explicit Basic-tier choice
Moving to GPT-6 Luna or Sol, the successors to GPT-5.6 Luna and Sol, when paid access is enabled
Choosing GPT-6 Astra for requests where you want reasoning on for every answer
Picking a Fast variant when response speed matters more than credit cost
Requests that combine text with a screenshot, diagram, or other uploaded image on any GPT variant
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
Every GPT variant except GPT-5.4 Mini requires current paid-model entitlement
GPT-6 Astra and Astra Fast have no none step; their reasoning effort starts at low
Fast variants trade a higher credit rate for speed; this page makes no claim about exact latency
This page does not claim external benchmark leadership or permanent performance differences between generations
Four generations, two tiers
Vizify currently exposes thirteen GPT chat variants across four generations: 5.4 (Nano, Mini, and the unnumbered GPT-5.4), 5.5, 5.6 (Luna, Terra, and Sol), and 6 (Luna, Sol, and Astra, each with a Fast variant). GPT-5.4 Mini is the only Basic model. Every other GPT variant requires Pro or a credit pack purchase. The 5.6 generation has its own page at /models/gpt-5-6/; this page documents the 5.4, 5.5, and 6 lines and how the generations relate.
GPT-6: the newest generation
GPT-6 Luna and GPT-6 Sol succeed GPT-5.6 Luna and GPT-5.6 Sol. GPT-6 adds Astra, the variant OpenAI positions for its hardest reasoning, coding, and research work, and has no Terra. The earlier GPT-5.x models stay available, so an existing conversation on GPT-5.6 keeps working; switch to the GPT-6 counterpart for a later request when you want the newer model.
Each GPT-6 model also comes as a Fast variant. It is the same model served on a faster tier, and Vizify charges twice the credits per input and output token for it. Nothing else about the contract changes: tier, image input, and reasoning range match the standard variant.
GPT-5.4 Mini is the account default
GPT-5.4 Mini is the account-wide default chat model in the Vizify app profile. Free users can browse the full model list, with all other choices locked until Pro or a credit pack purchase unlocks switching. The App validates catalog and account access before use.
Reasoning effort by generation
GPT-5.4 Nano, GPT-5.4 Mini, GPT-5.4, and GPT-5.5 share five reasoning-effort steps: none, low, medium, high, and extra high, with medium as the default. GPT-5.6 Luna, Terra, and Sol and GPT-6 Luna and Sol, including their Fast variants, add a sixth step, max, above extra high. GPT-6 Astra is different: it has no none step, so its five steps run from low to max and every answer uses some reasoning. 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 thirteen current GPT chat variants are 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, input support, and reasoning ranges were checked against the Vizify repository and app profile on 2026-09-26, and the Fast-variant credit rates against the Agent pricing catalog. 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-6 as a search term. Provider benchmarks, external release status, 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?
Thirteen: GPT-5.4 Nano, GPT-5.4 Mini, GPT-5.4, GPT-5.5, GPT-5.6 Luna, Terra, and Sol, and GPT-6 Luna, Sol, and Astra with a Fast variant of each. GPT-5.4 Mini is the only Basic model; all others require paid access.
What is the newest GPT generation in Vizify?
GPT-6. Vizify offers GPT-6 Luna, GPT-6 Sol, and GPT-6 Astra, plus Luna Fast, Sol Fast, and Astra Fast. GPT-6 Luna and Sol succeed GPT-5.6 Luna and Sol, which stay available on the GPT-5.6 page. GPT-6 has no Terra variant.
What do the GPT-6 Fast variants change?
Each Fast variant is the same GPT-6 model served on a faster tier, and it costs twice the credits per input and output token of the standard variant. Choose it when speed matters more than credit use.
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 still the default model in Vizify?
Yes. GPT-5.4 Mini is the default and the only chat model available without paid access. GPT-6 did not change the default.
Can these GPT models accept an uploaded image in Vizify?
Yes. All thirteen GPT chat variants, including every GPT-6 model, are marked for text and image input in the Vizify app profile. Upload handling and model access are still validated by the App.
How does reasoning effort differ across GPT generations?
GPT-5.4 Nano, Mini, GPT-5.4, and GPT-5.5 offer five steps: none, low, medium, high, and extra high. GPT-5.6 Luna, Terra, and Sol, and GPT-6 Luna and Sol with their Fast variants, add a sixth step, max, above extra high. GPT-6 Astra and Astra Fast run from low to max and have no none step, so reasoning cannot be turned off. Medium is the default everywhere.
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.