When was GPT-5.4-Pro released?

GPT-5.4-Pro was released by OpenAI on Thursday, Mar 5 2026.

Who made GPT-5.4-Pro?

GPT-5.4-Pro was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

How much does GPT-5.4-Pro cost?

GPT-5.4-Pro costs $30.00 per million input tokens and $180.00 per million output tokens through the OpenAI API. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.

What benchmark scores did GPT-5.4-Pro get?

GPT-5.4-Pro reports 7 tracked benchmark scores — BrowseComp: 89.3%; Humanity's Last Exam (with tools): 58.7%; ARC-AGI-2: 83.3%; FrontierMath (Tier 1–3): 50%; FrontierMath (Tier 4): 38%; GPQA Diamond: 94.4%; GDPval (win/tie rate): 82%. Scores are the figures published at release by OpenAI.

Is GPT-5.4-Pro open source?

No. GPT-5.4-Pro is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

What came before and after GPT-5.4-Pro?

OpenAI's previous tracked release was GPT-5.4 on Mar 5 2026. It was followed by GPT-5.4 mini on Mar 17 2026.

GPT-5.4-Pro

Released Mar 5 2026

GPT-5.4-Pro is an AI model released by OpenAI on Thursday, Mar 5 2026, the same day as GPT-5.4. Benchmark results (shown below) cover BrowseComp, Humanity's Last Exam, ARC-AGI-2, FrontierMath, GPQA Diamond, and GDPval (win/tie rate).

GPT-5.4-Pro

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