GPT-5.4
GPT-5.4 has documented text, reasoning, and search capabilities, but this site cannot yet calculate a reliable maximum cost before a request. Its details remain available while generation stays disabled.
Online use is currently unavailable
This page is for reviewing the model's capabilities, use cases, and public references. The model does not appear in the home workbench, and you cannot submit generation tasks with it.
At a glance
What is this model like?
This is neither a Coming Soon listing nor a discontinued model. The restriction comes from the site's preauthorization safety boundary: until maximum output usage can be proven, GPT-5.4 stays out of the model selector and message requests are rejected before any credits are charged.
Key facts
Quickly assess whether this model fits your use case.
Also known as
The same model may appear under different names across documentation and community discussions; this list keeps them easy to search and compare.
Common questions
These practical questions focus on the task, input conditions, and result requirements you should confirm before choosing.
Selection guide
Use these decision points when choosing a model.
Choose an available model such as Claude Sonnet 5; this model cannot currently accept messages.
Save one non-sensitive sample each for everyday Q&A, summarization, and retrieval.
Access can be reconsidered when a reliable maximum output limit is available.
Popular comparisons
Compare common alternatives on the same task to clarify differences in inputs, controls, and cost.
Model comparison
Compare the current model with alternatives at a glance.
Practical usage insights
Practical guidance based on public sources, current on-site limits, and representative tasks.
Lower rates still need a hard bound
Search access is not factual accuracy
Capabilities
Multi-turn text
Reasoning effort
Web search
Use cases
Frequent Q&A
Search-assisted summaries
Lightweight reasoning
Prompt tips
Define acceptance criteria first
Verify search results
Keep repeatable samples
Why choose it
What to know first
Currently unavailable
This page is for reviewing the model's capabilities, use cases, and public references. The model does not appear in the home workbench, and you cannot submit generation tasks with it. A lower-rate GPT-5.4 candidate intended for frequent text tasks.
FAQ
Related models
Compare these similar candidates before deciding.
Claude Opus 4.8
Claude Opus 4.8 is designed for high-complexity text analysis and consequential writing. Kyeo AI offers text-only chat with up to 20,000 characters per message and an explicit 4,096-token maximum output.
Claude Sonnet 5
Claude Sonnet 5 is the more balanced Claude candidate in this batch for research, code explanation, and structured writing. Its maximum output on this site is 4,096 tokens.
Claude Opus 5
Claude Opus 5 is a flagship candidate for high-complexity text work. Kyeo AI limits each message to 20,000 characters, includes the 40 most recent submitted messages, and caps output at 4,096 tokens.
Sources
Content is based on model documentation, feature references, and the settings available on Kyeo AI.
GPT-5.4's conversation input, reasoning levels, search tool, and token rates are confirmed. However, the maximum output usage cannot yet be proven before a request is created, so generation remains unavailable on this site.