OpenAI launched GPT-6 Cyber for authorized vulnerability research through Daybreak

On November 5, 2026, OpenAI released GPT-6 Cyber, a cybersecurity agent model trained to stay within authorized scope, with access set up through Daybreak. The preview model it replaced, gpt-5.5-cyber-preview, was set for removal on February 1, 2027.

On November 5, 2026, OpenAI released GPT-6 Cyber, a cybersecurity agent model that the company said was trained to stay within authorized scope. OpenAI described the release in its GPT-6 Cyber announcement, and access was set up through Daybreak.

What the release covered

Purpose: investigating vulnerabilities, reproducing them in an authorized test environment and verifying fixes.
Access: set up through Daybreak.
Scope: OpenAI said the model was trained to stay within authorized scope.
API pricing: $20 per 1M input tokens, $2 for cached input and $100 for output.
Cache writes: $25 per 1M tokens for 30 minutes and $50 per 1M tokens for 12 hours.
Deprecation: gpt-5.5-cyber-preview was set to be removed on February 1, 2027, according to a deprecation notice dated November 5, 2026.

What it means for people building with AI

The release made offensive security capability of the GPT-6 generation available to vetted defenders, with scope adherence as its main safety claim. The workflow OpenAI described was to investigate a vulnerability, reproduce it in an authorized test environment and verify the fix. The preview model gpt-5.5-cyber-preview, which GPT-6 Cyber replaced, was set for removal on February 1, 2027, giving teams that used it a fixed date to plan around.

Other OpenAI sources

OpenAI also listed GPT-6 Cyber in its API changelog on November 5, 2026, and published the removal notice for the preview model on its API deprecations page.

Sources

GPT-6 Cyber: Advancing the frontier of aligned cybersecurity agents (OpenAI, November 5, 2026, official)
OpenAI API changelog: GPT-6 Cyber (OpenAI, November 5, 2026, official)
OpenAI News RSS feed (item: GPT-6 Cyber) (OpenAI, November 5, 2026, official)
Deprecations | OpenAI API (2026-11-05 notice) (OpenAI, November 5, 2026, official)

Written with AI assistance, strictly from the sources listed above. Before it went live, automated checks verified its dates, sources and every language edition.