ChatGPT web app update reveals multiple new GPT-4 and GPT-5 model IDs, including gpt-5, gp

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Aug 19, 2026 14:18 UTC web app https://chatgpt.com

ChatGPT web app update reveals multiple new GPT-4 and GPT-5 model IDs, including gpt-5, gpt-5-pro, and gpt-5-thinking, alongside new feature flags.

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looks like openai is prepping some new models in the chatgpt web app! seeing references to gpt-5, gpt-5-pro, and gpt-5-thinking in the latest frontend bundle.

spotted a bunch of new gpt-4 and gpt-5 model ids in the chatgpt web app code today. could hint at some upcoming announcements beyond gpt-4o!

⚠️ FROM WEB-APP BUNDLE — may include vendored-dependency strings, verify before posting. ChatGPT web app (https://chatgpt.com) deployed new frontend code [055ab224f26c8aa4 -> 6bdf7a71f5c84e3b]: +51494 strings, -0 strings, 298 interesting [model_id] (18) + GPT-5 + gpt-4 + gpt-4l + gpt-4o + gpt-4o-gdrive + gpt-4o-gdrive-0212 + gpt-4o-gdrive-0314 + gpt-4o-gdrive-1007-mclick + gpt-4o-gdrive-1124 + gpt-4o-gdrive-1124-citation + gpt-4o-mini-filled + gpt-5 + gpt-5-pro + gpt-5-thinking + gpt-5.6-luna-wm + o3-mini-high-in-context-upsell-plus + o4-mini + ve reached the current usage cap for GPT-4. You can continue with the default model now, or try again {formattedTime}. <link>Learn more</link>`,values:{link:GJt,formattedTime:a}}):(0,zH.jsx)($,{id:`TextMessageDisplay.gptUsageCapExceededCustomFeature`,defaultMessage:`You [feature_flag] (121) + ,"data-internal-model-search": + ,action:E,actionMessageDescriptor:KR.focusPromptTextarea,group:Um.Internal,bindings:[{binding:[bf.Shift,bf.Escape]}]},{key: + ,e[e.INTERNAL=1]= + ,group:lpe.Internal,bindings:[{binding:[Ma.Shift,Ma.ArrowDown]}],actionMessageDescriptor:Sd({id: + ,group:lpe.Internal,bindings:[{binding:[Ma.Shift,Ma.ArrowUp]}],actionMessageDescriptor:Sd({id: + ,onChange:e=>{f(e.currentTarget.value)},placeholder:u.formatMessage(h4.internalModelsPlaceholder),selectAllOnFocus:!1,value:d}),(0,m4.jsx)( + ,void 0,{surface:e,account_scope:t,is_enabled:String(n)}),V.logStructuredEvent( + 3VyEPC5dTP_model_instructions_enabled + Beta + CHATGPT_ADS_CONSENT_MODAL_ACTION_TYPE_SAVE_PERSONALIZATION_ENABLED + Internal + Internal Medicine + Internal Medicine / Hospitalist Service + Internal Server Error + Missing react shared internals. Check version. + Turnstile-Internal-Error + Unsupported internal plugin-service URL: ${e}. Expected a /public base. + add-feature-flag-evaluation + allConnectors.internal.mcp + ask_chatgpt_enabled + banner_enabled + bazaar_histo