GPT-5.4

Claims and evidence

• Released 5 March 2026 ● Primary source[1]opening and Availability and pricing [3]Mar 5 (2026) [4]March 5, 2026: GPT-5.4 Thinking in ChatGPT

• Status AvailableListed in the API model catalog and not on the deprecations page. ● Primary source[2] [5]

• Successor of GPT-5.2GPT-5.4 Thinking replaced GPT-5.2 Thinking in ChatGPT; the system card notes there is no GPT-5.3 Thinking, so GPT-5.2 Thinking is the baseline. ● Primary source[1]Knowledge work; Availability and pricing [6]Introduction

• Change · Tool use Adds native computer use: through the API's built-in computer tool it can issue mouse and keyboard commands in response to screenshots.Compared with GPT-5.2 ● Primary source[1]Computer use and vision [3]Mar 5 (2026)
• Change · Context length Context window grows to 1,050,000 tokens in the API, from 400,000 for GPT-5.2.Compared with GPT-5.2 ● Primary source[2]Model details [7]Model details
• Change · Tool use Adds tool search in the API, which gives the model a short tool list and loads a tool's full definition only when it is needed.Compared with GPT-5.2 ● Primary source[1]
• Change · Safety OpenAI treats it as High cyber capability and deployed it with matching safeguards; the system card calls this a first for a general-purpose model.Compared with GPT-5.2 ● Primary source[6]

• Input text, image ● Primary source[2]Model details
• Output text ● Primary source[2]Model details
• Feature Reasoning modeReasoning effort none (default), low, medium, high and xhigh. ● Primary source[2] [6]Introduction
• Feature Computer useBuilt-in computer tool in the Responses API. ● Primary source[1]Computer use and vision [3]Mar 5 (2026)
• Feature Function calling ● Primary source[2]Supported features
• Feature Long context ● Primary source[3]Mar 5 (2026) [2]Model details
• Context window 1,050,000 tokensThe announcement and changelog round this to 1M tokens; in Codex the standard window is 272K with experimental 1M support. ● Primary source[2]Model details
• Parameters Not disclosedNot disclosed by OpenAI. No claim madeNo source
• Access consumer app, API ● Primary source[1]Availability and pricing

Lineage

Variants

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