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GPT-5.4

Frontier Vision OpenAI

OpenAI's frontier model for complex professional work. Features 1.05M context window, 128k output tokens, and reasoning token support. Reasoning.effort supports: none (default), low, medium, high and xhigh.

Try on Simtheory

Qwen 3.6 Plus Frontier Claude 3.7 Sonnet Frontier Claude 3.7 Sonnet (high output) Frontier Claude 3.7 Sonnet (thinking) Frontier Claude 4.5 Opus Frontier Claude 4.5 Sonnet Frontier Claude 4.5 Sonnet (thinking) Frontier Claude 4.6 Opus Frontier Claude 4.6 Opus Max Frontier Claude 4.6 Sonnet Frontier

Specifications

Context window 1,050,000 tokens

Max output 128,000 tokens

Knowledge cutoff August 2025

Multipart messages Yes

Vision capabilities Yes

Default Parameters

Temperature 0.3

Top P 1.0

Frequency penalty 0.0

Presence penalty 0.0

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