February 202625 releases
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500K downloads day 1Codex App launch (macOS)Codex in GitHub AgentHQCodex in Xcode 26.3Live workshopAgent HQ betaCodex in VS CodeAll paid plansGPT-5.3-Codex launchNew SOTA on SWE-bench
300M ChatGPT usersCodex hackathon recap7
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9Ads test in ChatGPTCodex in Cursor + GitHubDeep Research → GPT-5.2Export + follow-up Q11
12Cerebras partnershipGPT-5.3-Codex-SparkNVIDIA ~30K engineers13
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15@steipete joins OpenAI
Personal AI future16
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24All developers accessGPT-5.3-Codex in Responses API25
26Code → Design → CodeFigma integration27
28
February 2026
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Feb 26
2 releasesMarch 202647 releases
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1
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3Codex APAC hackathonFewer refusalsGPT-5.3 Instant GACodex for WindowsNative agent sandboxCodex speed boostGPT-5.4 launchGPT-5.4 Thinking + ProCodex for OSS programCodex Security previewCodex Security → Pro8
9Acquiring PromptfooEvals + red-teaming10
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12Automations now GAGPT-5.4 #1 CursorBench13
14Codex goes globalMeetups in 20+ cities15
16Codex × Notion
Subagents in Codex3.3× Codex usageAPI + ChatGPT + CodexGPT-5.4 mini + nanoCommunity hub launchOSS applications openDesktop global shortcutIndia expansion$100 credits (US+CA)Codex for StudentsFaster agent workflows22
23ChatGPT File LibraryPlus / Pro / Business24
25$10K API credits prizeCodex Creator ChallengeSearch in Codex app
Codex dominates dev workflow
Michigan data center steel up
Plugins launch in CodexCodex Skills for humans
Markdown is the new PythonCodex Security: find & fix vulnsAsync tasks: 60% overnight usageRealtime API refresherVoice agents at scale lessons$40B round closedCodex full PR workflow
Codex MCP walkthroughCrypto apps via Coinbase pluginMarch 2026
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April 202635 releases
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1Image optimization in one shotLinear plugin in Codex2ChatGPT in CarPlayCodex team pricing (no seat cost)New pay-as-you-go pricing3Kath joins Codex teamVoice agent debugs slides live4Codex × Vercel deployment5Codex App Server for agentic appsGPT-5.4 auto-translates docsCodex Pro tiermacOS app cert updateAgents SDK sandboxes16Codex automationsCodex computer useCodex image generationGitHub review commentsGPT-Rosalind launchIn-app browser feedbackMore Codex pluginsRemote Connection alphaCodex Chronicle memory21Euphony chat log visualizer22OpenAI launched workspace agents in ChatGPT for shared long-running, cross-tool team workflows.OpenAIDevs highlighted gpt-image-2 use in OpenArt Smart Shot for story-to-shot visual planning.23GPT-5.5 launch in ChatGPT & CodexCodex browser use expandedAuto-review mode for longer tasks24GPT-5.5 available in APIgpt-realtime-1.5 for interactive voice appsHyperFrames official Codex plugin28Codex: update repo to GPT-5.529DevDay 2026 announcedWebSocket faster agent loopsFigma plugin: FigJam boards
Image optimization in one shotLinear plugin in CodexChatGPT in CarPlayCodex team pricing (no seat cost)New pay-as-you-go pricingKath joins Codex teamVoice agent debugs slides liveCodex × Vercel deploymentCodex App Server for agentic appsGPT-5.4 auto-translates docs6
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9Codex Pro tier10
11macOS app cert update12
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15Agents SDK sandboxesCodex automationsCodex computer useCodex image generationGitHub review commentsGPT-Rosalind launchIn-app browser feedbackMore Codex pluginsRemote Connection alpha17
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20Codex Chronicle memoryEuphony chat log visualizerOpenAI launched workspace agents in ChatGPT for shared long-running, cross-tool team workflows.OpenAIDevs highlighted gpt-image-2 use in OpenArt Smart Shot for story-to-shot visual planning.GPT-5.5 launch in ChatGPT & CodexCodex browser use expandedAuto-review mode for longer tasksGPT-5.5 available in API25
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27gpt-realtime-1.5 for interactive voice appsHyperFrames official Codex pluginCodex: update repo to GPT-5.5DevDay 2026 announcedWebSocket faster agent loopsFigma plugin: FigJam boards30
April 2026
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May 202621 releases
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6MRC open networking protocolCodex Chrome extensionGPT-Realtime-2 voice modelChain of thought monitorsGPT-Realtime-2 CRM integration10
11Daybreak cyber defense platformOpenAI Deployment CompanyCodex OpenAI Developers pluginSymphony: auto agent per task13
14Codex mobile app previewCodex hooks + access tokensRemote SSH GA15
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18Codex remote Mac controlGuaranteed Capacity offeringSynthID watermarkMath breakthrough proofCodex AppshotsCodex team plugins sharingAdvanced annotation mode23
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27Private MCP serversWorkload Identity Federation28
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May 2026
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May 27
2 releases@OpenAI · @OpenAIDevs · @sama · @gdb · @romainhuet · @npew · @DanielEdrisian · @embirico · @bolinfest · @steipete