OpenAI's GPT-5.4 is here
OpenAI has a new model GPT-5.4, and it's live in ChatGPT, Codex, and via the API. They explain the model as:
It incorporates the industry-leading coding capabilities of GPT‑5.3‑Codex while improving how the model works across tools, software environments, and professional tasks involving spreadsheets, presentations, and documents.
I used the model inside Codex CLI and Codex app, and GPT-5.4 seemed slightly better than GPT-5.3-Codex. I asked both models to update the pricing for GPT-5.4 API in this pricing calculator. And GPT-5.4 added both gpt-5.4 & gpt-5.4-pro models and also updated all required descriptions on the page, but GPT-5.3-Codex just added gpt-5.4 pricing and nothing else.
Also, the model seemed better at tool calling than all previous models.
I loved this post from Ethan Mollick comparing the capabilities of GPT-4 and GPT-5.4, and it shows how far the model has come in the last 1 year. Then there's this post from Simon as well, featuring the pelicans drawn by the models.
I am still exploring the model, and will update this page if new findings come up.
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