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GPT-6 family models always rejected as invalid_prompt, GPT-5.6 works #52846

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GPT-6 family models always rejected as invalid_prompt, GPT-5.6 works#52846
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CLIIssues related to the Codex CLIbugSomething isn't workingmodel-behaviorIssues related to behaviors exhibited by the model

Description

@oxox-xoxo
oxox-xoxo
opened on Oct 10, 2026

What version of Codex CLI is running?

0.161.0

What subscription do you have?

codex pro x2-

Which model were you using?

No response

What platform is your computer?

No response

What terminal emulator and version are you using (if applicable)?

No response

Codex doctor report

{
  "schemaVersion": 1,
  "generatedAt": "1791627634s since unix epoch",
  "overallStatus": "warning",
  "codexVersion": "0.162.1",
  "checks": {
    "app_server.status": {
      "id": "app_server.status",
      "category": "app-server",
      "status": "ok",
      "summary": "background server is running",
      "details": {
        "app-server version": "0.162.1",
        "control socket": "C:\\Users\\admin\\.codex\\app-server-control\\app-server-control.sock",
        "daemon state dir": "C:\\Users\\admin\\.codex\\app-server-daemon",
        "dedicated pid file": "C:\\Users\\admin\\.codex\\app-server-daemon\\daemon.pid (file)",
        "dedicated update-loop pid file": "C:\\Users\\admin\\.codex\\app-server-daemon\\daemon-updater.pid (file)",
        "mode": "ephemeral",
        "pid file": "C:\\Users\\admin\\.codex\\app-server-daemon\\app-server.pid (missing)",
        "settings": "C:\\Users\\admin\\.codex\\app-server-daemon\\settings.json (missing)",
        "status": "running",
        "update-loop pid file": "C:\\Users\\admin\\.codex\\app-server-daemon\\app-server-updater.pid (missing)"
      },
      "remediation": null,
      "durationMs": 30
    },
    "auth.credentials": {
      "id": "auth.credentials",
      "category": "auth",
      "status": "ok",
      "summary": "auth is configured",
      "details": {
        "auth file": "C:\\Users\\admin\\.codex\\auth.json",
        "auth storage mode": "File",
        "stored API key": "false",
        "stored ChatGPT tokens": "true",
        "stored agent identity": "false",
        "stored auth mode": "chatgpt"
      },
      "remediation": null,
      "durationMs": 0
    },
    "config.load": {
      "id": "config.load",
      "category": "config",
      "status": "ok",
      "summary": "config loaded",
      "details": {
        "CODEX_HOME": "C:\\Users\\admin\\.codex",
        "active thread overrides": "not inspected",
        "config.toml": "C:\\Users\\admin\\.codex\\config.toml",
        "config.toml parse": "ok",
        "configuration load ms": "11",
        "configuration scope": "invocation config, including cloud-managed policy",
        "configured TUI mode": "fullscreen",
        "cwd": "C:\\Users\\admin",
        "enabled feature flags": "<redacted>",
        "feature flag overrides": "none",
        "feature flags enabled": "58",
        "log dir": "C:\\Users\\admin\\.codex\\log",
        "mcp servers": "1",
        "model": "gpt-6.1-sol",
        "model provider": "openai",
        "sqlite home": "C:\\Users\\admin\\.codex"
      },
      "remediation": null,
      "durationMs": 0
    },
    "desktop.app.version": {
      "id": "desktop.app.version",
      "category": "desktop",
      "status": "ok",
      "summary": "the desktop application is installed",
      "details": {
        "log directory": "$HOME\\AppData\\Local\\Codex/Logs",
        "running": "false",
        "version": "26.1007.2314.0"
      },
      "remediation": null,
      "durationMs": 0
    },
    "desktop.app_server.handshake": {
      "id": "desktop.app_server.handshake",
      "category": "desktop",
      "status": "ok",
      "summary": "the desktop application is not running",
      "details": {},
      "remediation": null,
      "durationMs": 0
    },
    "desktop.security.enforcement": {
      "id": "desktop.security.enforcement",
      "category": "desktop",
      "status": "ok",
      "summary": "no locally visible recent Codex security enforcement was found",
      "details": {},
      "remediation": null,
      "durationMs": 0
    },
    "git.environment": {
      "id": "git.environment",
      "category": "git",
      "status": "ok",
      "summary": "git executable found; execution not verified",
      "details": {
        "PATH git #1": "C:\\Program Files\\Git\\cmd\\git.exe",
        "PATH git entries": "1",
        "git execution": "not inspected (PATH helpers are not executed)",
        "repo detected": "false",
        "selected git": "C:\\Program Files\\Git\\cmd\\git.exe"
      },
      "remediation": null,
      "durationMs": 6
    },
    "git.worktree.dev_drive": {
      "id": "git.worktree.dev_drive",
      "category": "git",
      "status": "ok",
      "summary": "no Git worktree is active",
      "details": {},
      "remediation": null,
      "durationMs": 0
    },
    "installation": {
      "id": "installation",
      "category": "install",
      "status": "ok",
      "summary": "installation looks consistent",
      "details": {
        "PATH codex #1": "D:\\nodejs\\codex.cmd",
        "current executable": "D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\bin\\codex.exe",
        "install context": "npm (package D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc, bin D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\bin, resources D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\codex-resources, path D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\codex-path)",
        "managed by Vite+": "false",
        "managed by bun": "false",
        "managed by npm": "true",
        "managed by pnpm": "false",
        "managed package root": "D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex",
        "npm update target": "not inspected (PATH helpers are not executed)"
      },
      "remediation": null,
      "durationMs": 4
    },
    "mcp.config": {
      "id": "mcp.config",
      "category": "mcp",
      "status": "warning",
      "summary": "MCP configuration has optional issues",
      "details": {
        "configured servers": "1",
        "disabled servers": "0",
        "node_repl": "env var CODEX_WINDOWS_REGISTERED_CORE is not set",
        "stdio servers": "1"
      },
      "remediation": "Set the missing MCP env vars or disable the affected server.",
      "durationMs": 0
    },
    "network.env": {
      "id": "network.env",
      "category": "network",
      "status": "ok",
      "summary": "network-related environment looks readable",
      "details": {
        "SSL_CERT_FILE": "readable file D:\\minconda\\Library\\ssl\\cacert.pem",
        "managed proxy": "not configured",
        "proxy env vars": "none",
        "respect system proxy": "disabled"
      },
      "remediation": null,
      "durationMs": 0
    },
    "network.provider_reachability": {
      "id": "network.provider_reachability",
      "category": "reachability",
      "status": "ok",
      "summary": "active provider endpoints are reachable over HTTP",
      "details": {
        "ChatGPT inference URL": "https://chatgpt.com/backend-api/<redacted> reachable (HTTP 405)",
        "desktop assets CDN": "https://persistent.oaistatic.com/codex-app-prod/<redacted> reachable (HTTP 200)",
        "reachability mode": "ChatGPT auth"
      },
      "remediation": null,
      "durationMs": 526
    },
    "network.websocket_reachability": {
      "id": "network.websocket_reachability",
      "category": "websocket",
      "status": "ok",
      "summary": "Responses WebSocket handshake succeeded",
      "details": {
        "DNS": "1 IPv4, 1 IPv6, first IPv4",
        "auth mode": "chatgpt",
        "connect timeout": "15000 ms",
        "endpoint": "wss://chatgpt.com/backend-api/<redacted>",
        "handshake result": "HTTP 101 Switching Protocols",
        "model provider": "openai",
        "provider name": "OpenAI",
        "proxy env vars": "none",
        "reasoning header": "false",
        "server model present": "false",
        "supports websockets": "true",
        "wire API": "responses"
      },
      "remediation": null,
      "durationMs": 1022
    },
    "runtime.provenance": {
      "id": "runtime.provenance",
      "category": "runtime",
      "status": "ok",
      "summary": "running npm on windows-x86_64",
      "details": {
        "commit": "unknown",
        "current executable": "D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\bin\\codex.exe",
        "install method": "npm (package D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc, bin D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\bin, resources D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\codex-resources, path D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\codex-path)",
        "platform": "windows-x86_64",
        "version": "0.162.1"
      },
      "remediation": null,
      "durationMs": 0
    },
    "runtime.search": {
      "id": "runtime.search",
      "category": "search",
      "status": "ok",
      "summary": "search command found (bundled); execution not verified",
      "details": {
        "search command": "D:\\nvm\\v24.18.0\\node_modules\\@openai\\codex\\node_modules\\@openai\\codex-win32-x64\\vendor\\x86_64-pc-windows-msvc\\codex-path\\rg.exe",
        "search command readiness": "file exists",
        "search provider": "bundled"
      },
      "remediation": null,
      "durationMs": 0
    },
    "sandbox.filesystem_paths": {
      "id": "sandbox.filesystem_paths",
      "category": "sandbox",
      "status": "ok",
      "summary": "no explicit filesystem paths to probe",
      "details": {},
      "remediation": null,
      "durationMs": 0
    },
    "sandbox.helpers": {
      "id": "sandbox.helpers",
      "category": "sandbox",
      "status": "ok",
      "summary": "sandbox configuration is readable",
      "details": {
        "approval policy": "OnRequest",
        "codex-linux-sandbox helper": "none",
        "denied-read glob rules": "0",
        "denied-read restrictions": "false",
        "denied-read rules": "0",
        "execve wrapper helper": "none",
        "filesystem sandbox": "restricted",
        "glob scan max depth": "unbounded",
        "managed filesystem source": "none",
        "network sandbox": "restricted",
        "sandbox backend": "elevated",
        "sandbox provisioning": "complete"
      },
      "remediation": null,
      "durationMs": 2
    },
    "security.endpoint": {
      "id": "security.endpoint",
      "category": "security",
      "status": "ok",
      "summary": "no supported endpoint protection detected",
      "details": {
        "endpoint products": "none detected"
      },
      "remediation": null,
      "durationMs": 19
    },
    "state.paths": {
      "id": "state.paths",
      "category": "state",
      "status": "ok",
      "summary": "state paths and databases are inspectable",
      "details": {
        "CODEX_HOME": "C:\\Users\\admin\\.codex (dir)",
        "active rollout files": "569 files, 1980057676 total bytes, 3479890 average bytes",
        "archived rollout files": "3 files, 305053 total bytes, 101684 average bytes",
        "goals DB": "C:\\Users\\admin\\.codex\\goals_1.sqlite (file)",
        "goals DB integrity": "ok",
        "log DB": "C:\\Users\\admin\\.codex\\logs_2.sqlite (file)",
        "log DB integrity": "ok",
        "log dir": "C:\\Users\\admin\\.codex\\log (missing)",
        "memories DB": "C:\\Users\\admin\\.codex\\memories_1.sqlite (file)",
        "memories DB integrity": "ok",
        "memories v2 DB": "C:\\Users\\admin\\.codex\\memories_v2_1.sqlite (missing)",
        "memories v2 DB integrity": "skipped (missing)",
        "queue DB": "C:\\Users\\admin\\.codex\\queue_1.sqlite (file)",
        "queue DB integrity": "ok",
        "sqlite home": "C:\\Users\\admin\\.codex (dir)",
        "state DB": "C:\\Users\\admin\\.codex\\state_5.sqlite (file)",
        "state DB integrity": "ok",
        "thread history DB": "C:\\Users\\admin\\.codex\\thread_history_1.sqlite (file)",
        "thread history DB integrity": "ok"
      },
      "remediation": null,
      "durationMs": 57
    },
    "state.rollout_db_parity": {
      "id": "state.rollout_db_parity",
      "category": "threads",
      "status": "ok",
      "summary": "rollout files and state DB thread inventory agree",
      "details": {
        "default model provider": "openai",
        "rollout DB active files": "569",
        "rollout DB active rows": "569",
        "rollout DB archive mismatches": "0",
        "rollout DB archived files": "3",
        "rollout DB archived rows": "3",
        "rollout DB duplicate DB paths": "0",
        "rollout DB duplicate rollout thread ids": "0",
        "rollout DB malformed file names": "0",
        "rollout DB missing active rows": "0",
        "rollout DB missing archived rows": "0",
        "rollout DB model providers": "openai=511, custom=54, cc-switch-official=7",
        "rollout DB rows": "572",
        "rollout DB scan cap reached": "false",
        "rollout DB scan errors": "0",
        "rollout DB sources": "vscode=189, subagent:other=169, subagent:thread_spawn=135, cli=77, exec=2",
        "rollout DB stale rows": "0"
      },
      "remediation": null,
      "durationMs": 387
    },
    "system.disk": {
      "id": "system.disk",
      "category": "disk",
      "status": "ok",
      "summary": "sufficient free disk space (73.6 GiB)",
      "details": {
        "CODEX_HOME available": "73.6 GiB",
        "failure threshold": "1.0 GiB",
        "warning threshold": "5.0 GiB",
        "worktree available": "73.6 GiB"
      },
      "remediation": null,
      "durationMs": 0
    },
    "system.environment": {
      "id": "system.environment",
      "category": "system",
      "status": "ok",
      "summary": "OS language zh-CN",
      "details": {
        "EDITOR": "not set",
        "VISUAL": "not set",
        "os": "Windows 10.0.26300 (Windows 11 Professional) [64-bit]",
        "os language": "zh-CN",
        "os type": "Windows",
        "os version": "10.0.26300"
      },
      "remediation": null,
      "durationMs": 0
    },
    "terminal.env": {
      "id": "terminal.env",
      "category": "terminal",
      "status": "ok",
      "summary": "terminal metadata was detected",
      "details": {
        "WT_SESSION": "present",
        "color output": "enabled",
        "console input code page": "65001",
        "console output code page": "65001",
        "stderr console mode": "0x00000007 (VT processing: true)",
        "stderr is terminal": "true",
        "stdin is terminal": "true",
        "stdout console mode": "0x00000007 (VT processing: true)",
        "stdout is terminal": "true",
        "terminal": "Windows Terminal",
        "terminal size": "116x30"
      },
      "remediation": null,
      "durationMs": 0
    },
    "terminal.title": {
      "id": "terminal.title",
      "category": "title",
      "status": "ok",
      "summary": "terminal title default",
      "details": {
        "terminal title activity": "true",
        "terminal title items": "activity, project-name",
        "terminal title project source": "cwd",
        "terminal title project value": "admin",
        "terminal title source": "default"
      },
      "remediation": null,
      "durationMs": 0
    },
    "updates.status": {
      "id": "updates.status",
      "category": "updates",
      "status": "ok",
      "summary": "update configuration is locally consistent",
      "details": {
        "cached latest version": "0.162.1",
        "check for update on startup": "true",
        "last checked at": "2026-10-10T10:16:12.168874500Z",
        "latest version": "0.162.1",
        "latest version status": "current version is not older",
        "npm update target": "not inspected (PATH helpers are not executed)",
        "update action": "npm install -g @openai/codex",
        "version cache": "C:\\Users\\admin\\.codex\\version.json"
      },
      "remediation": null,
      "durationMs": 865
    }
  }
}

What issue are you seeing?

All GPT-6 family models (GPT-6 Astra, Sol, Luna, and GPT-6.1) in Codex consistently fail with invalid_prompt, even for harmless prompts such as "Hello" or "Reply only with OK."

The exact error is:
Invalid prompt: your prompt was flagged as potentially violating our usage policy. (code=invalid_prompt)

GPT-5.6 works normally with the same account, while all GPT-6 models fail across multiple devices. ChatGPT web also works normally.

codex doctor --json reports healthy authentication, network connectivity, WebSocket connectivity, and installation. No local security enforcement was detected.

This appears to be a possible account-specific, server-side GPT-6 safety classification or model routing issue.

Uploaded diagnostic thread ID: 01a12550-14ee-7982-9abb-a6961752b3e9

Please investigate why all GPT-6 family models are rejecting harmless prompts for this account.

Image

What steps can reproduce the bug?

Uploaded thread: 01a12550-14ee-7982-9abb-a6961752b3e9

What is the expected behavior?

No response

Additional information

No response

Activity

  1. oxox-xoxo
    added
    bugSomething isn't working
    on Oct 10, 2026
  2. github-actions
    added
    CLIIssues related to the Codex CLI
    model-behaviorIssues related to behaviors exhibited by the model
    on Oct 10, 2026

  3. github-actions commented on Oct 10, 2026

    @github-actions
    github-actionsbot
    on Oct 10, 2026 – with GitHub Actions
    Contributor

    Potential duplicates detected. Please review them and close your issue if it is a duplicate.

    Powered by Codex Action

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