OpenAI Codex Enterprise Push: Mobile Launch, Windows Sandbox, and Customer Stories · history
Version 9
2026-05-27 08:09 UTC · 429 items
What
OpenAI's Codex platform has grown to 4M+ weekly active developers [1] through an April–May 2026 enterprise push spanning cross-platform launches (iOS, Android, Windows, on-premises via Dell [15]), seven GSI partnerships [1], and a Gartner Magic Quadrant Leader designation alongside GitHub and Cursor [29]. Named customer deployments now include Virgin Atlantic (78-80% legacy codebase reduction, zero P1 defects at launch [10]), Singular Bank (60-90 min daily banker savings [11]), NVIDIA, Rakuten, and others — all sourced from OpenAI-controlled materials. CVE-2025-59532, a publicly exploitable command injection with a Docker-based proof-of-concept [25], has no confirmed remediation timeline from OpenAI. Ramp's May 2026 AI Index reports that Anthropic has overtaken OpenAI in business AI adoption [27][28] — an independent market-share signal absent from OpenAI's own reporting.
Why it matters
The Ramp business adoption finding [27] introduces a third-party counter-narrative to OpenAI's enterprise scale story at exactly the moment OpenAI is most publicly committed to Codex as its enterprise growth driver. The accumulation of very specific customer metrics (zero P1 defects, 78-80% codebase size reduction [10]) continues to originate exclusively from OpenAI-controlled or co-published sources, making independent verification structurally unavailable.
Open questions
CVE-2025-59532 has a public Docker-based proof-of-concept [25] and Check Point Research's independent characterization as a command injection [23] — has OpenAI released a patched CLI version or published an explicit remediation timeline, particularly given that its 'Running Codex safely' blog [26] was positioned as an enterprise reference model before the flaw was disclosed?
Ramp's May 2026 AI Index reports Anthropic overtook OpenAI in business AI adoption [27][28] — on what methodology (spend share, seat count, usage volume) does this finding rest, and does it include Codex-specific enterprise deployments or only ChatGPT/API usage?
Virgin Atlantic's case study cites 78-80% legacy codebase reduction and zero P1 defects at launch [10], and Singular Bank reports 60-90 minutes daily savings [11] — all claims originate from OpenAI-published materials; has any independent technical or productivity analysis verified outcomes of this specificity?
Cursor is confirmed positioned furthest to the right in the 2026 Gartner Magic Quadrant [18] and Tabnine is a confirmed Visionary [19] — on what specific capability dimensions does Gartner differentiate the three Leaders from each other and from the Visionaries tier?
Narrative
OpenAI launched Codex as a production enterprise coding platform across April–May 2026, reporting growth from 3 million to over 4 million weekly active developers [1] and announcing Codex Labs alongside partnerships with seven global systems integrators: Accenture, Capgemini, CGI, Cognizant, Infosys, PwC, and TCS [1]. Named enterprise deployments span NVIDIA [2], AutoScout24 [3], Sea Limited [4], and a second wave covering Virgin Atlantic, Ramp, Notion, Cisco, and Rakuten [1]. A 2-month free enterprise trial was opened for new sign-ups [5], and multiple sources report Q1 2026 revenue at approximately $5.7B with Codex cited as a growth driver [6][7] — though one critical analysis reported a -122% Non-GAAP operating margin alongside stalled ChatGPT growth [8]. OpenAI's B2B Signals research, published May 6, reported that frontier enterprises use 3.5x more AI per worker than the median, with the gap driven primarily by workflow depth rather than message volume [9].
The customer case study record expanded with specific metrics. Virgin Atlantic reports a 78-80% reduction in legacy codebase size, near-100% unit test coverage and zero P1 defects at a new mobile app launch, and refactoring timelines compressed from two weeks to 30 minutes to an hour [10]; engineering leadership noted that Codex is 'moving into a real tool for everyone,' beyond pure engineers [10]. Singular Bank built an internal assistant called Singularity using ChatGPT and Codex, saving bankers 60-90 minutes daily on meeting prep, portfolio analysis, and client follow-up [11]. Simplex deployed ChatGPT Enterprise and Codex to reduce design, build, and testing time [12]. All performance claims originate from OpenAI's own blog or co-published materials.
Cross-platform expansion ran in parallel. Codex launched in the ChatGPT mobile app on iOS and Android on May 14 [13], a Windows app launched in the Microsoft Store on May 16 [14], and a Dell Technologies partnership announced May 18 enabled on-premises and hybrid deployment [15] — with Dell simultaneously deploying Grok 2.5 for xAI on the same infrastructure, confirming it as a multi-model broker [16]. The 2026 Gartner Magic Quadrant for Enterprise AI Coding Agents named OpenAI, GitHub (third consecutive year [17]), and Cursor as Leaders, with Cursor confirmed furthest to the right [18] and Tabnine as a Visionary [19]. UiPath treats Codex, Claude Code, and GitHub Copilot as interchangeable selectable components [20][21], and Infosys — one of OpenAI's seven named GSI partners — publicly positioned itself as model-agnostic [22].
The security picture remains unresolved. CVE-2025-59532 was independently characterized as a command injection by Check Point Research [23], formally listed in NVD [24], and demonstrated via a public Docker-based proof-of-concept [25] — two weeks after OpenAI published 'Running Codex safely at OpenAI' [26] as an enterprise reference model. No official remediation timeline had been confirmed as of late May 2026. Against OpenAI's scale narrative, Ramp's May 2026 AI Index reports that Anthropic has overtaken OpenAI in business AI adoption [27][28] — an independent, transaction-data-based market signal that sits in direct tension with OpenAI's public claims of enterprise momentum.
Timeline
- 2026-04-21: OpenAI publishes 'Scaling Codex to enterprises worldwide,' reporting 4M+ weekly active developers, announcing Codex Labs, and naming seven GSI partners [1][65]
- 2026-05-06: OpenAI publishes B2B Signals research showing frontier firms use 3.5x more AI per worker driven by workflow depth; Singular Bank case study published reporting 60-90 min daily banker savings [9][11][66][67]
- 2026-05-08: OpenAI publishes 'Running Codex safely at OpenAI,' documenting internal sandboxing, approval workflows, and agent-native telemetry as an enterprise reference model [26]
- 2026-05-12: OpenAI publishes NVIDIA and AutoScout24 enterprise case studies alongside a finance-team Codex tutorial [2][3][68]
- 2026-05-13: OpenAI opens a 2-month free Codex Enterprise trial for new business sign-ups [5]
- 2026-05-14: Codex launches in ChatGPT mobile app on iOS and Android in preview; Sea Limited case study published [13][4][69][70]
- 2026-05-15: OpenAI publishes engineering retrospective on the Windows sandbox, detailing rejected security primitives and the final composed architecture [33]
- 2026-05-16: Codex Windows app launches in Microsoft Store; community user later reports building their own sandbox after Codex wiped files on their machine [14][71][58][72][73]
- 2026-05-18: OpenAI and Dell Technologies announce partnership to deploy Codex in hybrid and on-premises enterprise environments [15][50][51][52][53][54]
- 2026-05-20: UiPath launches enterprise platform treating Codex, Claude Code, and GitHub Copilot as interchangeable selectable components; Infosys issues press release on OpenAI collaboration while publicly positioning as model-agnostic [20][61][21][74][75][22]
- 2026-05-21: GitHub officially launches Claude and Codex as selectable agents in Agent HQ platform; GPT-5.3-Codex reported as new base model for Copilot Business and Enterprise [37][38][41][42][44][76][77][78]
- 2026-05-22: Gartner 2026 Magic Quadrant names OpenAI, GitHub, and Cursor as Leaders (Cursor furthest right; Tabnine Visionary); CVE-2025-59532 disclosed with NVD listing; Virgin Atlantic case study published with 78-80% codebase reduction and zero P1 defects metrics [29][79][62][80][17][46][18][19][24][56][39][10]
- 2026-05-23: OpenAI Codex Security research preview announced; Check Point Research characterizes CVE-2025-59532 as command injection; public Docker-based proof-of-concept published [30][23][25][81][82]
- 2026-05-24: Dell confirms Grok 2.5 deployment via Dell AI Factory for xAI on the same infrastructure used for Codex; GPT-5.5 rolls out; Codex Security reports 1.2 million commits scanned and 10,561 high-severity issues [16][32][31][83]
- 2026-05-25: Multiple sources report OpenAI Q1 2026 revenue at approximately $5.7B with Codex as a driver; critical analysis reports -122% Non-GAAP operating margin; Ramp AI Index reports Anthropic has overtaken OpenAI in business AI adoption [6][8][7][84][27][28]
Perspectives
OpenAI (product and marketing)
Positions Codex as a production-ready, cross-platform enterprise platform with broad industry adoption, rapid user growth, expanding GSI and hardware partnerships, Gartner Leader recognition, and explicit ambition to serve knowledge work; B2B Signals research frames systematic agentic workflow depth as competitive differentiation [1][9][15][29].
Evolution: Customer case study depth expanded with Virgin Atlantic's specific metrics (78-80% codebase reduction, zero P1 defects [10]) and Singular Bank's daily time savings [11], strengthening the scale narrative; the ~$5.7B revenue claim [6] is complicated by critical reporting of -122% operating margin [8] and Ramp data showing Anthropic ahead in business adoption [27].
OpenAI (engineering and security)
Published 'Running Codex safely at OpenAI' as a reference model for enterprise adoption [26] and a candid retrospective on the Windows sandbox architecture [33]; Codex Security preview extends the security-tooling narrative [30][31].
Evolution: The 'Running Codex safely' post [26], published May 8, predated CVE-2025-59532's public disclosure by two weeks — placing OpenAI's reference-model pitch in direct tension with a subsequently confirmed, exploitable command injection [23] and public proof-of-concept [25].
GitHub / Microsoft
GitHub earned the Gartner Magic Quadrant Leader designation for the third consecutive year [17] and formally launched Claude and Codex as selectable agents in Agent HQ [37][38]; Microsoft published Azure OpenAI/Foundry documentation for Codex as a cloud-sovereign deployment path [39].
Evolution: Three-year incumbency [17] continues to frame OpenAI's first-year entry as joining an established market rather than defining one; GitHub CPO publicly celebrated the recognition [40].
Cursor
Named a Leader in the 2026 Gartner Magic Quadrant and confirmed as positioned furthest to the right — the highest placement on the completeness of vision axis among the three Leaders [18].
Evolution: Consistent; furthest-right placement confirmed by Tommy Collison's tweet [18].
Dell Technologies
Multi-model infrastructure broker enabling on-premises and hybrid AI deployment across vendors — confirmed deploying both Codex for OpenAI [15] and Grok 2.5 for xAI [16] on the same Dell AI Factory infrastructure with no disclosed exclusivity.
Evolution: Consistent; Dell's own blog [16] explicitly confirms the xAI/Grok 2.5 arrangement uses identical infrastructure as the Codex deal.
Security researchers (Check Point Research, Cymulate, community)
Check Point Research independently characterized CVE-2025-59532 as a command injection [23]; GHSA attributed it to a path configuration logic bug [56]; Cymulate published mitigations for RCE and prompt injection vectors [57]; a public Docker-based proof-of-concept appeared [25]; a community user documented Codex deleting their files [58].
Evolution: Consistent; no new technical disclosures or remediation confirmation in this pass.
Independent market data (Ramp AI Index)
Ramp's May 2026 AI Index reports that Anthropic has overtaken OpenAI in business AI adoption [27][28], providing transaction-data-based evidence that sits in direct tension with OpenAI's enterprise growth narrative.
Evolution: New voice in this pass; prior synthesis contained no independent market-share data challenging OpenAI's scale claims.
Enterprise automation platforms (UiPath, GitHub)
UiPath treats Codex, Claude Code, and GitHub Copilot as interchangeable selectable components [20][21]; GitHub's Agent HQ formally treats Claude and Codex as equivalent selectable agents [37] — absorbing Codex into existing orchestration layers rather than adopting it as a standalone platform.
Evolution: Consistent; commoditization pattern unchanged.
Tensions
- OpenAI published 'Running Codex safely at OpenAI' on May 8 as an enterprise security reference model [26], but CVE-2025-59532 was independently confirmed as a command injection [23] and demonstrated via public proof-of-concept [25] two weeks later, with no confirmed remediation timeline from OpenAI. [26][33][25][24][56][23][57][36]
- OpenAI's scale narrative claims 4M+ weekly active developers and approximately $5.7B Q1 2026 revenue with Codex as a driver [1][6][7], while Ramp's May 2026 AI Index reports Anthropic has overtaken OpenAI in business AI adoption [27][28] and a critical analysis reports a -122% Non-GAAP operating margin [8]. [1][6][8][7][27][28]
- The 2026 Gartner Magic Quadrant was initially framed as providing OpenAI with its first independent analyst validation [29], but GitHub earned the same Leader designation for the third consecutive year [17], Cursor is confirmed furthest to the right [18], and Tabnine is a Visionary [19] — reflecting category maturity across incumbents rather than a breakthrough for any new entrant. [29][62][17][46][18][19][40]
- OpenAI markets Codex as a uniquely positioned enterprise platform, but Infosys — one of its seven named GSI partners — publicly positions itself as model-agnostic [22], UiPath bundles Codex alongside Claude Code and GitHub Copilot as interchangeable components [20][21], and Dell simultaneously deploys Grok 2.5 for xAI on identical infrastructure [16]. [20][21][22][37][16][1]
- All named enterprise customer performance claims — Virgin Atlantic's 78-80% codebase reduction [10], Singular Bank's 60-90 min daily savings [11], NVIDIA and AutoScout24 outcomes [2][3] — originate exclusively from OpenAI's own blog or co-published materials, making the platform's actual scale and impact unverifiable from independent sources. [1][11][2][3][4][10][6][7]
- OpenAI frames Codex as expanding from coding into knowledge work including report preparation and lead qualification [15], but UiPath absorbs Codex as one component within its own enterprise automation orchestration layer [63][64] and GitHub integrates it as one agent among peers in Agent HQ [37] — raising whether Codex is expanding into adjacent territory or being subsumed by existing platforms. [15][63][64][37]
Sources
- [1] Scaling Codex to enterprises worldwide — OpenAI Blog (2026-04-21)
- [2] How NVIDIA engineers and researchers build with Codex — OpenAI Blog (2026-05-12)
- [3] AutoScout24 scales engineering with AI-powered workflows — OpenAI Blog (2026-05-12)
- [4] Sea's View on the Future of Agentic Software Development with Codex — OpenAI Blog (2026-05-14)
- [5] Get 2 months of Codex for your enterprise, free — reactive:openai-codex-enterprise-rollout (2026-05-13)
- [6] PYMNTS | OpenAI’s Codex Helps Drive Nearly $6 Billion Quarter — reactive:openai-codex-enterprise-rollout
- [7] OpenAI Posts $5.7B Q1 Revenue, Leads Anthropic | Let's Data Science — reactive:openai-codex-enterprise-rollout
- [8] News: OpenAI Had A Negative 122% Non-GAAP Operating Margin ... — reactive:openai-codex-enterprise-rollout
- [9] How frontier enterprises are building an AI advantage — OpenAI Blog (2026-05-06)
- [10] How Virgin Atlantic ships faster with Codex — OpenAI Blog (2026-05-22)
- [11] Singular Bank helps bankers move fast with ChatGPT and Codex — OpenAI Blog (2026-05-06)
- [12] Simplex rethinks software development with Codex — OpenAI Blog (2026-05-07)
- [13] Work with Codex from anywhere — OpenAI Blog (2026-05-14)
- [14] OpenAI Codex Arrives on Windows with Native Sandbox and Agentic Workflows | Windows Forum — reactive:openai-codex-enterprise-rollout
- [15] OpenAI and Dell partner to bring Codex to hybrid and on-premise enterprise environments — OpenAI Blog (2026-05-18)
- [16] Grok 2.5 and Dell AI Factory Power AI Revolution | Dell — reactive:openai-codex-enterprise-rollout
- [17] GitHub recognized as a Leader in the Gartner® Magic Quadrant ... — reactive:openai-codex-enterprise-rollout
- [18] Cursor is a leader in the 2026 Gartner Magic Quadrant for Enterprise AI Coding Agents, positioned furthest to the right ... — reactive:coding-agent-industry-pivot (2026-05-22)
- [19] Tabnine Named a Visionary in the 2026 Gartner® Magic Quadrant™ for Enterprise AI Coding Agents - Tabnine — reactive:openai-codex-enterprise-rollout
- [20] UiPath Launches Enterprise Platform for Claude Code, OpenAI Codex, Copilot, and More - https://t.co/BKLcG2k1oK @UiPath @... — reactive:openai-codex-enterprise-rollout (2026-05-20)
- [21] UiPath opens its platform to every coding agent - here's why Claude Code and Codex go first — reactive:openai-codex-enterprise-rollout
- [22] Infosys Partners with OpenAI on Codex | CRN India posted on the ... — reactive:openai-codex-enterprise-rollout
- [23] OpenAI Codex CLI Vulnerability: Command Injection — reactive:openai-codex-enterprise-rollout
- [24] CVE-2025-59532 Detail - NVD — reactive:openai-codex-enterprise-rollout
- [25] GitHub - baktistr/cve-2025-59532-poc: A Docker-based research ... — reactive:openai-codex-enterprise-rollout
- [26] Running Codex safely at OpenAI — OpenAI Blog (2026-05-08)
- [27] Anthropic finally beat OpenAI in business AI adoption - VentureBeat — reactive:enterprise-ai-coding-battle
- [28] Anthropic beats OpenAI on business adoption - Ramp — reactive:enterprise-ai-coding-battle
- [29] OpenAI named a Leader in enterprise coding agents by Gartner — OpenAI Blog (2026-05-22)
- [30] Codex Security: now in research preview - OpenAI — reactive:openai-codex-enterprise-rollout
- [31] OpenAI Codex Security Scanned 1.2 Million Commits and Found 10,561 High-Severity Issues — reactive:openai-codex-enterprise-rollout
- [32] RT @OpenAI: GPT-5.5 is rolling out today for Plus, Pro, Business and Enterprise users across ChatGPT and Codex. — reactive:openai-codex-enterprise-rollout (2026-05-24)
- [33] Building a safe, effective sandbox to enable Codex on Windows — OpenAI Blog (2026-05-15)
- [34] Sandbox – Codex | OpenAI Developers — reactive:openai-codex-enterprise-rollout
- [35] How we built the Codex sandbox for Windows: — reactive:openai-codex-enterprise-rollout
- [36] Most AI coding tools don't sandbox on Windows (except one) Why ... — reactive:openai-codex-enterprise-rollout
- [37] Pick your agent: Use Claude and Codex on Agent HQ — reactive:openai-codex-enterprise-rollout
- [38] Claude and Codex are now available in public preview on GitHub — reactive:openai-codex-enterprise-rollout
- [39] Codex with Azure OpenAI in Microsoft Foundry Models — reactive:openai-codex-enterprise-rollout
- [40] Ashley Kramer's Post — reactive:openai-codex-enterprise-rollout
- [41] GitHub brings Claude and Codex agents directly into Copilot - Tessl — reactive:openai-codex-enterprise-rollout
- [42] Third-party agents in Visual Studio Code — reactive:openai-codex-enterprise-rollout
- [43] How GitHub Copilot Agent HQ is Transforming Development ... — reactive:openai-codex-enterprise-rollout
- [44] GitHub Copilot · Agents on GitHub — reactive:openai-codex-enterprise-rollout
- [45] GitHub Agent HQ: Multi-Agent Platform Guide 2025 - Digital Applied — reactive:openai-codex-enterprise-rollout
- [46] Cursor named a Leader in the 2026 Gartner® Magic Quadrant™ for ... — reactive:openai-codex-enterprise-rollout
- [47] Cursor Leads Gartner AI Coding Agents Quadrant | StartupHub.ai — reactive:openai-codex-enterprise-rollout
- [48] Ethan Ng's Post - LinkedIn — reactive:openai-codex-enterprise-rollout
- [49] Cursor Reviews & Ratings 2026 | Gartner Peer Insights — reactive:openai-codex-enterprise-rollout
- [50] OpenAI and Dell Technologies partner to bring Codex to hybrid and on-premises enterprise environments | OpenAI https://t... — reactive:openai-codex-enterprise-rollout (2026-05-20)
- [51] OpenAI and Dell Collaborate to Deploy Codex in Hybrid and On-Premise Enterprise Settings — reactive:openai-codex-enterprise-rollout (2026-05-20)
- [52] OpenAI + Dell just brought Codex into enterprise infrastructure. On-premises. No cloud required. — reactive:openai-codex-enterprise-rollout (2026-05-19)
- [53] OpenAI and Dell just announced a partnership to bring Codex into hybrid and on-premises enterprise environments. — reactive:openai-codex-enterprise-rollout (2026-05-19)
- [54] OpenAI and Dell are moving Codex toward governed enterprise infrastructure: hybrid/on-prem data, systems of record, and ... — reactive:openai-codex-enterprise-rollout (2026-05-18)
- [55] Dell Technologies to Bring Grok SpaceXAI Models On-Premises to ... — reactive:openai-codex-enterprise-rollout
- [56] Codex has sandbox bypass due to bug in path configuration logic — reactive:openai-codex-enterprise-rollout
- [57] Codex CLI RCE & Prompt Injection Mitigations — reactive:openai-codex-enterprise-rollout
- [58] Built a Windows sandbox after Codex wiped files on my machine — reactive:openai-codex-enterprise-rollout
- [59] A recently disclosed vulnerability in OpenAI Codex shows how AI ... — reactive:openai-codex-enterprise-rollout
- [60] Anthropic vs OpenAI Business Adoption in 2026: What the RAMP ... — reactive:openai-codex-enterprise-push
- [61] Infosys goes model-agnostic as OpenAI builds GSI network to scale ... — reactive:openai-codex-enterprise-rollout
- [62] 🎯 CONFIRMED: OpenAI named a Leader in Gartner’s 2026 Magic Quadrant for enterprise coding agents — Codex is now enterpri... — reactive:openai-codex-enterprise-rollout (2026-05-22)
- [63] From AI speed to enterprise reliability: introducing UiPath for Coding Agents | UiPath — reactive:openai-codex-enterprise-rollout
- [64] Unlocking Enterprise Transformation at Scale With UiPath for Coding Agents | UiPath — reactive:openai-codex-enterprise-rollout
- [65] OpenAI leans on global consultancies to expand Codex use in large ... — reactive:openai-codex-enterprise-rollout
- [66] Enterprise AI Adoption Shifts from Access to Depth: B2B Signals — reactive:openai-codex-enterprise-push
- [67] OpenAI B2B Signals: Frontier firms use 3.5x more AI per worker. Only 36% of the gap is message volume. The rest is depth... — reactive:openai-codex-enterprise-push (2026-05-16)
- [68] How finance teams use Codex — OpenAI Blog (2026-05-12)
- [69] OpenAI says Codex is coming to your phone - TechCrunch — reactive:codex-practical-dev-tool
- [70] Codex on mobile - ChatGPT — reactive:codex-practical-dev-tool
- [71] The Codex app is now on Windows - Codex - OpenAI Developer Community — reactive:openai-codex-enterprise-rollout
- [72] The Codex app is now on Windows - YouTube — reactive:openai-codex-enterprise-rollout
- [73] Codex - Free download and install on Windows | Microsoft Store — reactive:openai-codex-enterprise-rollout
- [74] Infosys Announces Strategic Collaboration with OpenAI to Accelerate Enterprise AI Transformation and Unlock AI Value at Scale — reactive:openai-codex-enterprise-rollout
- [75] Infosys Announces Strategic Collaboration with OpenAI to Accelerate Enterprise AI Transformation and Unlock AI Value at Scale — reactive:openai-codex-enterprise-rollout
- [76] 🚨Codex CLI 0.133.0 is out! — reactive:openai-codex-enterprise-rollout (2026-05-21)
- [77] Codex CLI 0.133.0 is out. — reactive:openai-codex-enterprise-rollout (2026-05-21)
- [78] Enterprise AI coding just crossed the procurement line: GPT-5.3-Codex is now the Copilot Business/Enterprise base model,... — reactive:openai-codex-enterprise-rollout (2026-05-21)
- [79] Codex、Gartnerの企業向けAIコーディングLeaderに選出 💻🤖 — reactive:openai-codex-enterprise-rollout (2026-05-23)
- [80] BREAKING: OpenAI named a leader in enterprise coding agents by Gartner. Codex is officially setting the standard for lar... — reactive:openai-codex-enterprise-rollout (2026-05-22)
- [81] OpenAI Rolls Out Codex Security Vulnerability Scanner - SecurityWeek — reactive:openai-codex-enterprise-rollout
- [82] We're introducing Codex Security - Reddit — reactive:openai-codex-enterprise-rollout
- [83] OpenAI GPT-5.5 Benchmark (CodeRabbit) — reactive:codex-practical-dev-tool
- [84] OpenAI revenue, valuation & funding | Sacra — reactive:openai-codex-enterprise-rollout