When was GPT-5.5 Cyber released?

GPT-5.5 Cyber was released by OpenAI on Thursday, May 7 2026.

Who made GPT-5.5 Cyber?

GPT-5.5 Cyber was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

How much does GPT-5.5 Cyber cost?

GPT-5.5 Cyber costs $12.50 per million input tokens and $75.00 per million output tokens through the OpenAI API. Cached input is $1.25 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on November 9, 2026.

What benchmark scores did GPT-5.5 Cyber get?

GPT-5.5 Cyber reports 1 tracked benchmark score — CyberGym: 85.6%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

Is GPT-5.5 Cyber open source?

No. GPT-5.5 Cyber is a closed 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-5.5 Cyber?

OpenAI's previous tracked release was GPT-5.5-Pro on Apr 23 2026, 14 days earlier. It was followed by GPT-5.6 Sol on Jun 26 2026.

GPT-5.5 Cyber

Released May 7 2026

GPT-5.5 Cyber is an AI model released by OpenAI on Thursday, May 7 2026, 14 days after GPT-5.5-Pro. Benchmark results (shown below) cover CyberGym.

API pricing

Daybreak Red approval required

Input: $12.50
Cached input: $1.25
Output: $75.00

Reasoning or thinking is supported.
The preview endpoint is scheduled to shut down on February 1, 2027. The pricing table publishes only short-context rates.

USD per 1M tokens

Benchmarks

CyberGym

85.6%

#3 of 17

Compare GPT-5.5 Cyber with

GPT-5.5 Cyber

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About

GPT-5.5 Cyber was released on May 7, 2026 in a limited preview for defenders responsible for securing critical infrastructure. OpenAI positioned the model for authorized vulnerability research, validation and patch development, with more permissive behavior for approved security work. The June 22, 2026 Daybreak announcement then brought an updated GPT-5.5 Cyber to a wider group of vetted defenders.

OpenAI reported 85.6% on CyberGym for the updated model, compared with 81.8% for GPT-5.5. CyberGym tests reproducing known vulnerabilities in software environments; that score is not a measure of discovering previously unknown flaws. Access was intended for verified defenders with additional controls, distinct from using the general GPT-5.5 model under Trusted Access for Cyber.

Frequently asked questions

: GPT-5.5 Cyber was released by OpenAI on Thursday, May 7 2026.
: GPT-5.5 Cyber was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.
: GPT-5.5 Cyber costs $12.50 per million input tokens and $75.00 per million output tokens through the OpenAI API. Cached input is $1.25 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on November 9, 2026.
: GPT-5.5 Cyber reports 1 tracked benchmark score — CyberGym: 85.6%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.
: No. GPT-5.5 Cyber is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
: OpenAI's previous tracked release was GPT-5.5-Pro on Apr 23 2026, 14 days earlier. It was followed by GPT-5.6 Sol on Jun 26 2026.