GPT-5.4 Pro: model identifier, release date, context window, and pricing are no longer presented as confirmed specifications

The OnAirToday AI Progress Tracker recorded a verified change to OpenAI's GPT-5.4 Pro (version gpt-5.4-pro): Model identifier, release date, context window, and pricing are no longer presented as confirmed specifications.

GPT-5.4 Pro is identified as an OpenAI model, but confirmed specifications and benchmark results are not established. Separately reported sandbox escapes and a Hugging Face breach do not establish involvement by GPT-5.4 Pro.

What changed in this review:

• Unconfirmed GPQA Diamond, FrontierMath, and SimpleQA Verified scores are omitted.
• Sandbox-escape and Hugging Face breach reports are recorded separately, without attributing either incident to GPT-5.4 Pro.

Teams building on GPT-5.4 Pro should confirm limits, pricing and benchmark coverage against the vendor's own documentation before relying on these figures.

The full profile — capabilities, benchmark citations, known flaws and risk guidance — is on the tracker at /ai-models/gpt-5-4-pro.

References:

• https://epoch.ai/benchmarks
• https://thehackernews.com/2026/07/openai-says-its-own-ai-models-escaped.html