cd /news/ai-products/openai-codex-adds-hidden-daybreak-bl… · home › topics › ai-products › article
[ARTICLE · art-106233] src=github.com ↗ pub= topic=ai-products verified=true sentiment=· neutral

OpenAI Codex adds hidden "Daybreak Blue" and "Daybreak Red" cybersecurity models

OpenAI's Codex repository commit 5bcd7b0 adds hidden 'Daybreak Blue' and 'Daybreak Red' cybersecurity model definitions, refreshing model capabilities, instructions, plan availability, and service-tier metadata. The commit also configures the auto-review model for Responses Lite and code-mode tools, updating Guardian request tests and MCP approval routing. The change spans 5 files with 474 additions and 88 deletions.

read5 min views1 publishedAug 21, 2026
OpenAI Codex adds hidden "Daybreak Blue" and "Daybreak Red" cybersecurity models
Image: Michielbdejong (auto-discovered)

Refresh bundled model definitions (

What changed #

  • Add the hidden Daybreak Blue and Daybreak Red model definitions.
  • Refresh model capabilities, instructions, plan availability, and service-tier metadata.
  • Configure the auto-review model for Responses Lite and code-mode tools, and update Guardian request tests for the resulting additional_tools and developer-message layout.

Testing #

  • Update Guardian request snapshots and assertions for initial and follow-up reviews.
  • Verify MCP approval routing against the developer-message form of the Guardian prompt. GitOrigin-RevId: 6680e9abebdcbc43224a81348591e26f8422f3ec#39770)
1 parent 39073ca commit 5bcd7b0Copy full SHA for 5bcd7b0

5 files changed

Lines changed: 474 additions & 88 deletions

File tree #

  • codex-rs

  • core

  • src/guardian

  • snapshots

  • tests/suite

  • models-manager

Lines changed: 13 additions & 9 deletions

Original file line number Diff line number Diff line change
5 5
6 6
7 7
8
-
9
-
10
-
8 +
9 +
10 +
11 +
12 +
11 13
12 14
13 15
26 28
27 29
28 30
29
-
30
-
31
-
31 +
32 +
33 +
34 +
35 +
32 36
33 37
34 38
45 49
46 50
47 51
48
-
49
-
50
-
52 +
53 +
54 +
51 55
52 56
53 57

Lines changed: 5 additions & 3 deletions

Original file line number Diff line number Diff line change
5 5
6 6
7 7
8
-
9
-
10
-
8 +
9 +
10 +
11 +
12 +
11 13
12 14
13 15
Original file line number Diff line number Diff line change
418 418
419 419
420 420
421
-
421 +
422 +
423 +
424 +
425 +
426 +
427 +
428 +
422 429
423 430
424 431
2024 2031
2025 2032
2026 2033
2027
-
2034 +
2035 +
2036 +
2037 +
2038 +
2028 2039
2029
-
2040 +
2041 +
2042 +
2043 +
2044 +
2045 +
2046 +
2047 +
2048 +
2049 +
2050 +
2051 +
2052 +
2053 +
2054 +
2055 +
2056 +
2057 +
2030 2058
2031
-
2059 +
2060 +
2061 +
2062 +
2063 +
2064 +
2065 +
2032 2066
2067 +
2033 2068
2034
-
2035
-
2069 +
2070 +
2036 2071
2037 2072
2038 2073
Original file line number Diff line number Diff line change
468 468
469 469
470 470
471
-
472
-
471 +
472 +
473 +
473 474
474 475
475 476

0 commit comments #

Comments

(0)

source & further reading
github.com — original article My AI agents kept trying to cross red lines, so I wrote them a constitution AGY Memory Engine: Zero-dependency SQLite FTS5 fact store and MCP server Show HN: AgentSight – eBPF observability for AI agents, no code changes
── more in #ai-products 4 stories · sorted by recency
── more on @openai 3 stories trending now
sponsored brought to you by zahid.host 4,200+ EU-deployed projects
reading about agents? ship yours in a single git push.

Run your AI side-project on zahid.host

EU-based hosting, git-push deploys, automatic HTTPS, no cold starts. Free tier with a custom domain — perfect for shipping the agent you just read about.

$git push zahid main
→ Live at https://your-agent.zahid.host ✓
Get free account → Pricing
from €0/mo · no card required
LIVE [news/openai-codex-adds-hi…] indexed:0 read:5min 2026-08-21 · —