Latest CLI does not support gpt-5.6-sol
Resolved 💬 3 comments Opened Jul 10, 2026 by sb10 Closed Jul 10, 2026
What version of Codex CLI is running?
codex-cli 0.144.1
What subscription do you have?
Enterprise
Which model were you using?
gpt-5.6-sol
What platform is your computer?
Linux 6.8.0-60-generic x86_64 x86_64
What terminal emulator and version are you using (if applicable)?
iTerm2, tmux
Codex doctor report
{
"schemaVersion": 1,
"generatedAt": "1783684874s since unix epoch",
"overallStatus": "ok",
"codexVersion": "0.144.1",
"checks": {
"app_server.status": {
"id": "app_server.status",
"category": "app-server",
"status": "ok",
"summary": "background server is running",
"details": {
"app-server version": "0.141.0",
"control socket": "/home/ubuntu/.codex/app-server-control/app-server-control.sock",
"daemon state dir": "/home/ubuntu/.codex/app-server-daemon",
"mode": "ephemeral",
"pid file": "/home/ubuntu/.codex/app-server-daemon/app-server.pid (missing)",
"settings": "/home/ubuntu/.codex/app-server-daemon/settings.json (missing)",
"status": "running",
"update-loop pid file": "/home/ubuntu/.codex/app-server-daemon/app-server-updater.pid (missing)"
},
"remediation": null,
"durationMs": 56
},
"auth.credentials": {
"id": "auth.credentials",
"category": "auth",
"status": "ok",
"summary": "auth is configured",
"details": {
"auth file": "/home/ubuntu/.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": "/home/ubuntu/.codex",
"config.toml": "/home/ubuntu/.codex/config.toml",
"config.toml parse": "ok",
"cwd": "/home/ubuntu/llm-knowledge-base",
"enabled feature flags": "shell_tool, unified_exec, shell_snapshot, code_mode_host, terminal_resize_reflow, sqlite, hooks, enable_request_compression, multi_agent, apps, tool_search_always_defer_mcp_tools, tool_suggest, plugins, in_app_browser, browser_use, browser_use_full_cdp_access, browser_use_external, computer_use, remote_plugin, plugin_sharing, image_generation, resize_all_images, skill_mcp_dependency_install, mentions_v2, steer, guardian_approval, goals, collaboration_modes, tool_call_mcp_elicitation, auth_elicitation, personality, fast_mode, tui_app_server, remote_compaction_v2, workspace_dependencies",
"feature flag overrides": "none",
"feature flags enabled": "35",
"log dir": "/home/ubuntu/.codex/log",
"mcp servers": "1",
"model": "gpt-5.6-sol",
"model provider": "openai",
"sqlite home": "/home/ubuntu/.codex"
},
"remediation": null,
"durationMs": 0
},
"git.environment": {
"id": "git.environment",
"category": "git",
"status": "ok",
"summary": "git version 2.43.0",
"details": {
".git entry": "directory",
"PATH git #1": "/usr/bin/git",
"PATH git #2": "/bin/git",
"PATH git entries": "2",
"git branch": "problemqueries",
"git build options": "git version 2.43.0; cpu: x86_64; no commit associated with this build; sizeof-long: 8; sizeof-size_t: 8; shell-path: /bin/sh",
"git exec path": "/usr/lib/git-core",
"git version": "git version 2.43.0",
"repo detected": "true",
"repo root": "/home/ubuntu/llm-knowledge-base",
"selected git": "/usr/bin/git"
},
"remediation": null,
"durationMs": 36
},
"installation": {
"id": "installation",
"category": "install",
"status": "ok",
"summary": "installation looks consistent",
"details": {
"PATH codex #1": "/home/ubuntu/.local/bin/codex",
"PATH codex #2": "/home/ubuntu/.local/bin/codex",
"PATH codex #3": "/home/ubuntu/.local/bin/codex",
"PATH codex entries": "3",
"current executable": "/home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl/bin/codex",
"install context": "standalone (unix, package /home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl, bin /home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl/bin, resources /home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl/codex-resources, path /home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl/codex-path)",
"managed by bun": "false",
"managed by npm": "false",
"managed by pnpm": "false",
"managed package root": "not set"
},
"remediation": null,
"durationMs": 0
},
"mcp.config": {
"id": "mcp.config",
"category": "mcp",
"status": "ok",
"summary": "MCP configuration is locally consistent",
"details": {
"configured servers": "1",
"disabled servers": "0",
"stdio servers": "1"
},
"remediation": null,
"durationMs": 0
},
"network.env": {
"id": "network.env",
"category": "network",
"status": "ok",
"summary": "network-related environment looks readable",
"details": {
"proxy env vars": "none"
},
"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 base URL": "https://chatgpt.com/backend-api/ reachable (HTTP 404)",
"reachability mode": "ChatGPT auth"
},
"remediation": null,
"durationMs": 102
},
"network.websocket_reachability": {
"id": "network.websocket_reachability",
"category": "websocket",
"status": "ok",
"summary": "Responses WebSocket handshake succeeded",
"details": {
"DNS": "2 IPv4, 2 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",
"models etag present": "true",
"provider name": "OpenAI",
"proxy env vars": "none",
"reasoning header": "false",
"server model present": "false",
"supports websockets": "true",
"wire API": "responses"
},
"remediation": null,
"durationMs": 683
},
"runtime.provenance": {
"id": "runtime.provenance",
"category": "runtime",
"status": "ok",
"summary": "running standalone on linux-x86_64",
"details": {
"commit": "unknown",
"current executable": "/home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl/bin/codex",
"install method": "standalone (unix, package /home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl, bin /home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl/bin, resources /home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl/codex-resources, path /home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl/codex-path)",
"platform": "linux-x86_64",
"version": "0.144.1"
},
"remediation": null,
"durationMs": 0
},
"runtime.search": {
"id": "runtime.search",
"category": "search",
"status": "ok",
"summary": "search is OK (bundled)",
"details": {
"search command": "/home/ubuntu/.codex/packages/standalone/releases/0.144.1-x86_64-unknown-linux-musl/codex-path/rg",
"search command readiness": "file exists",
"search provider": "bundled"
},
"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": "/home/ubuntu/.codex/tmp/arg0/codex-arg0wkgVAs/codex-linux-sandbox",
"execve wrapper helper": "/home/ubuntu/.codex/tmp/arg0/codex-arg0wkgVAs/codex-execve-wrapper",
"filesystem sandbox": "restricted",
"network sandbox": "restricted"
},
"remediation": null,
"durationMs": 0
},
"state.paths": {
"id": "state.paths",
"category": "state",
"status": "ok",
"summary": "state paths and databases are inspectable",
"details": {
"CODEX_HOME": "/home/ubuntu/.codex (dir)",
"active rollout files": "3550 files, 2231397483 total bytes, 628562 average bytes",
"archived rollout files": "0 files, 0 total bytes, 0 average bytes",
"goals DB": "/home/ubuntu/.codex/goals_1.sqlite (file)",
"goals DB integrity": "ok",
"log DB": "/home/ubuntu/.codex/logs_2.sqlite (file)",
"log DB integrity": "ok",
"log dir": "/home/ubuntu/.codex/log (dir)",
"memories DB": "/home/ubuntu/.codex/memories_1.sqlite (file)",
"memories DB integrity": "ok",
"sqlite home": "/home/ubuntu/.codex (dir)",
"standalone release cache": "4 entries in /home/ubuntu/.codex/packages/standalone/releases",
"state DB": "/home/ubuntu/.codex/state_5.sqlite (file)",
"state DB integrity": "ok"
},
"remediation": null,
"durationMs": 7589
},
"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": "3550",
"rollout DB active rows": "3550",
"rollout DB archive mismatches": "0",
"rollout DB archived files": "0",
"rollout DB archived rows": "0",
"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=3550",
"rollout DB rows": "3550",
"rollout DB scan cap reached": "false",
"rollout DB scan errors": "0",
"rollout DB sources": "subagent:thread_spawn=3359, vscode=189, cli=2",
"rollout DB stale rows": "0"
},
"remediation": null,
"durationMs": 29927
},
"system.environment": {
"id": "system.environment",
"category": "system",
"status": "ok",
"summary": "OS language C",
"details": {
"EDITOR": "not set",
"LANG": "C.UTF-8",
"VISUAL": "not set",
"os": "Ubuntu 24.4.0 (noble) [64-bit]",
"os language": "C",
"os type": "Ubuntu",
"os version": "24.4.0"
},
"remediation": null,
"durationMs": 7
},
"terminal.env": {
"id": "terminal.env",
"category": "terminal",
"status": "ok",
"summary": "terminal metadata was detected",
"details": {
"DISPLAY": "present",
"SSH_CLIENT": "present",
"SSH_CONNECTION": "present",
"SSH_TTY": "present",
"TERM": "screen",
"color output": "enabled",
"effective locale": "C.UTF-8",
"stderr is terminal": "true",
"stdin is terminal": "true",
"stdout is terminal": "true",
"terminal": "unknown",
"terminal size": "172x48"
},
"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": "git repo root",
"terminal title project value": "llm-knowledge-base",
"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": "0.144.1",
"check for update on startup": "true",
"last checked at": "2026-07-10T10:06:27.118166380Z",
"latest version": "0.144.1",
"latest version status": "current version is not older",
"update action": "standalone installer",
"version cache": "/home/ubuntu/.codex/version.json"
},
"remediation": null,
"durationMs": 67
}
}
}What issue are you seeing?
{"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.6-sol' model requires a newer version of Codex. Please upgrade to the latest
app or CLI and try again."}}
What steps can reproduce the bug?
Run the codex cli and try any prompt:
$ codex
⚠ Codex's Linux sandbox uses bubblewrap and needs access to create user namespaces.
⚠ Codex's Linux sandbox uses bubblewrap and needs access to create user namespaces.
╭───────────────────────────────────────────────╮
│ >_ OpenAI Codex (v0.144.1) │
│ │
│ model: gpt-5.6-sol max /model to change │
│ directory: ~/llm-knowledge-base │
╰───────────────────────────────────────────────╯
Tip: New Use /fast to enable our fastest inference with increased plan usage.
› what model are you?
⚠ Model metadata for `gpt-5.6-sol` not found. Defaulting to fallback metadata; this can degrade performance and cause issues.
■ {"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.6-sol' model requires a newer version of Codex. Please upgrade to the latest
app or CLI and try again."}}
›What is the expected behavior?
Model should work and be able to respond to prompts.
Additional information
As noted, this is the latest version as of today. Local usage of the model on a Mac using the Mac desktop app works fine with the same account.
This issue has 3 comments on GitHub. Read the full discussion on GitHub ↗