Unexpected status 404 Not Found: Model not found gpt-5.6-sol
Open 💬 2 comments Opened Jul 29, 2026 by thorzambo
💡 Likely answer: A maintainer (github-actions[bot], contributor)
responded on this thread — see the highlighted reply below.
What version of Codex CLI is running?
v0.145.0
What subscription do you have?
Pro 5x
Which model were you using?
gpt-5.6-sol
What platform is your computer?
Darwin 25.5.0 arm64 arm
What terminal emulator and version are you using (if applicable)?
Warp
Codex doctor report
codex doctor --json
{
"schemaVersion": 1,
"generatedAt": "1785306010s since unix epoch",
"overallStatus": "warning",
"codexVersion": "0.145.0",
"checks": {
"app_server.status": {
"id": "app_server.status",
"category": "app-server",
"status": "ok",
"summary": "background server is not running",
"details": {
"control socket": "/Users/thorzambo/.codex/app-server-control/app-server-control.sock",
"daemon state dir": "/Users/thorzambo/.codex/app-server-daemon",
"mode": "ephemeral",
"pid file": "/Users/thorzambo/.codex/app-server-daemon/app-server.pid (missing)",
"settings": "/Users/thorzambo/.codex/app-server-daemon/settings.json (missing)",
"status": "not running",
"update-loop pid file": "/Users/thorzambo/.codex/app-server-daemon/app-server-updater.pid (missing)"
},
"remediation": null,
"durationMs": 0
},
"auth.credentials": {
"id": "auth.credentials",
"category": "auth",
"status": "ok",
"summary": "auth is configured",
"details": {
"auth file": "/Users/thorzambo/.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": "/Users/thorzambo/.codex",
"config.toml": "/Users/thorzambo/.codex/config.toml",
"config.toml parse": "ok",
"cwd": "/Users/thorzambo/Code/IRONMAN",
"enabled feature flags": "shell_tool, unified_exec, shell_snapshot, code_mode_host, terminal_resize_reflow, sqlite, memories, 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, external_migration, image_generation, resize_all_images, skill_mcp_dependency_install, skill_search, mentions_v2, steer, guardian_approval, goals, collaboration_modes, tool_call_mcp_elicitation, auth_elicitation, personality, fast_mode, tui_app_server, prevent_idle_sleep, remote_compaction_v2, workspace_dependencies",
"feature flag overrides": "memories=true, external_migration=true, prevent_idle_sleep=true",
"feature flags enabled": "39",
"log dir": "/Users/thorzambo/.codex/log",
"mcp servers": "23",
"model": "gpt-5.6-sol",
"model provider": "openai",
"sqlite home": "/Users/thorzambo/.codex"
},
"remediation": null,
"durationMs": 0
},
"git.environment": {
"id": "git.environment",
"category": "git",
"status": "ok",
"summary": "git version 2.51.0",
"details": {
".git entry": "directory",
"PATH git #1": "/opt/homebrew/bin/git",
"PATH git #2": "/usr/bin/git",
"PATH git entries": "2",
"git branch": "main",
"git build options": "git version 2.51.0; cpu: arm64; no commit associated with this build; sizeof-long: 8; sizeof-size_t: 8; shell-path: /bin/sh; feature: fsmonitor--daemon; libcurl: 8.7.1; zlib: 1.2.12; SHA-1: SHA1_DC; SHA-256: SHA256_BLK; default-ref-format: files; default-hash: sha1",
"git exec path": "/opt/homebrew/opt/git/libexec/git-core",
"git version": "git version 2.51.0",
"repo detected": "true",
"repo root": "/Users/thorzambo/Code/IRONMAN",
"selected git": "/opt/homebrew/bin/git"
},
"remediation": null,
"durationMs": 132
},
"installation": {
"id": "installation",
"category": "install",
"status": "ok",
"summary": "installation looks consistent",
"details": {
"PATH codex #1": "/opt/homebrew/bin/codex",
"current executable": "/opt/homebrew/bin/codex",
"install context": "brew",
"managed by bun": "false",
"managed by npm": "false",
"managed by pnpm": "false",
"managed package root": "not set"
},
"remediation": null,
"durationMs": 3
},
"mcp.config": {
"id": "mcp.config",
"category": "mcp",
"status": "warning",
"summary": "MCP configuration has optional issues",
"details": {
"configured servers": "23",
"disabled servers": "1",
"optional reachability failed": "twenty: http://localhost:3000/mcp (HEAD connect failed; GET connect failed)",
"stdio servers": "21",
"streamable_http servers": "2"
},
"remediation": "Set the missing MCP env vars or disable the affected server.",
"durationMs": 745
},
"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": 291
},
"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": 639
},
"runtime.provenance": {
"id": "runtime.provenance",
"category": "runtime",
"status": "ok",
"summary": "running brew on macos-aarch64",
"details": {
"commit": "unknown",
"current executable": "/opt/homebrew/bin/codex",
"install method": "brew",
"platform": "macos-aarch64",
"version": "0.145.0"
},
"remediation": null,
"durationMs": 0
},
"runtime.search": {
"id": "runtime.search",
"category": "search",
"status": "ok",
"summary": "search is OK (system)",
"details": {
"search command": "rg",
"search command readiness": "ripgrep 15.1.0",
"search provider": "system"
},
"remediation": null,
"durationMs": 4
},
"sandbox.helpers": {
"id": "sandbox.helpers",
"category": "sandbox",
"status": "ok",
"summary": "sandbox configuration is readable",
"details": {
"approval policy": "Never",
"codex-linux-sandbox helper": "none",
"execve wrapper helper": "/Users/thorzambo/.codex/tmp/arg0/codex-arg0rPGwHA/codex-execve-wrapper",
"filesystem sandbox": "unrestricted",
"network sandbox": "enabled"
},
"remediation": null,
"durationMs": 0
},
"state.paths": {
"id": "state.paths",
"category": "state",
"status": "ok",
"summary": "state paths and databases are inspectable",
"details": {
"CODEX_HOME": "/Users/thorzambo/.codex (dir)",
"active rollout files": "2817 files, 15462859125 total bytes, 5489122 average bytes",
"archived rollout files": "322 files, 1459682645 total bytes, 4533175 average bytes",
"goals DB": "/Users/thorzambo/.codex/goals_1.sqlite (file)",
"goals DB integrity": "ok",
"log DB": "/Users/thorzambo/.codex/logs_2.sqlite (file)",
"log DB integrity": "ok",
"log dir": "/Users/thorzambo/.codex/log (dir)",
"memories DB": "/Users/thorzambo/.codex/memories_1.sqlite (file)",
"memories DB integrity": "ok",
"sqlite home": "/Users/thorzambo/.codex (dir)",
"state DB": "/Users/thorzambo/.codex/state_5.sqlite (file)",
"state DB integrity": "ok",
"thread history DB": "/Users/thorzambo/.codex/thread_history_1.sqlite (missing)",
"thread history DB integrity": "skipped (missing)"
},
"remediation": null,
"durationMs": 17107
},
"state.rollout_db_parity": {
"id": "state.rollout_db_parity",
"category": "threads",
"status": "warning",
"summary": "rollout files and state DB thread inventory differ",
"details": {
"default model provider": "openai",
"rollout DB active files": "2810",
"rollout DB active rows": "2810",
"rollout DB archive mismatches": "0",
"rollout DB archived files": "322",
"rollout DB archived rows": "322",
"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=3086, =45, custom-gateway=1",
"rollout DB rows": "3132",
"rollout DB scan cap reached": "false",
"rollout DB scan error sample": [
"blablabalbalblaalalbbla"],
"rollout DB scan errors": "7",
"rollout DB sources": "subagent:thread_spawn=1358, vscode=1171, exec=420, cli=171, subagent:other=11, subagent:review=1",
"rollout DB stale rows": "0"
},
"issues": [
{
"severity": "warning",
"cause": "rollout scan was incomplete or found bad files",
"measured": "7 scan errors, 0 malformed names, scan cap reached: false",
"expected": "rollout directories are fully scannable",
"remedy": "Check file permissions and unexpected files under CODEX_HOME sessions.",
"fields": []
}
],
"remediation": null,
"durationMs": 1961
},
"system.environment": {
"id": "system.environment",
"category": "system",
"status": "ok",
"summary": "OS language en-US",
"details": {
"EDITOR": "not set",
"LANG": "C.UTF-8",
"LC_CTYPE": "UTF-8",
"VISUAL": "not set",
"os": "Mac OS 26.5.2 [64-bit]",
"os language": "en-US",
"os type": "Mac OS",
"os version": "26.5.2"
},
"remediation": null,
"durationMs": 4
},
"terminal.env": {
"id": "terminal.env",
"category": "terminal",
"status": "ok",
"summary": "terminal metadata was detected",
"details": {
"COLORTERM": "truecolor",
"DISPLAY": "present",
"TERM_PROGRAM": "WarpTerminal",
"color output": "enabled",
"effective locale": "UTF-8",
"stderr is terminal": "true",
"stdin is terminal": "true",
"stdout is terminal": "true",
"terminal": "Warp",
"terminal size": "272x95",
"terminal version": "v0.2026.07.22.09.01.stable_01"
},
"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": "IRONMAN",
"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": "0.145.0",
"check for update on startup": "true",
"last checked at": "2026-07-29T05:06:36.620477Z",
"latest version": "0.146.0",
"latest version status": "newer version is available",
"update action": "brew upgrade --cask codex",
"version cache": "/Users/thorzambo/.codex/version.json"
},
"remediation": null,
"durationMs": 367
}
}
}What issue are you seeing?
unexpected status 404 Not Found: Model not found gpt-5.6-sol, url: https://chatgpt.com/backend-api/codex/responses, cf-ray:
a22a0489cd2a4c3f-MXP, request id: 0cc08469-3325-4895-9d24-422b6a439839
What steps can reproduce the bug?
Not sure, probably setting /goal + gpt-5.6-sol Ultra
What is the expected behavior?
Falling back from WebSockets to HTTPS transport. unexpected status 404 Not Found: Model not found gpt-5.6-sol-1p-parallel-
codexswic-ev3
Unexpected status 404 Not Found: Model not found gpt-5.6-sol, url: https://chatgpt.com/backend-api/codex/responses, ....
<img width="1776" height="1240" alt="Image" src="https://github.com/user-attachments/assets/ac4fd9b5-3ded-4185-9a26-59166ff6db3d" />
Additional information
_No response_
2 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
Powered by Codex Action
Same here, my Codex MacOS app send me:
1) _"unexpected status 404 Not Found: Model not found gpt-5.6-sol, url: https://chatgpt.com/backend-api/codex/responses, cf-ray: a229ffe25a0cd938-LAX, request id: 34205faa-be2b-4219-85c7-4e0a8e816402"_ and
2) _"Error running remote compact task: stream disconnected before completion: An error occurred while processing your request. You can retry your request, or contact us through our help center at help.openai.com if the error persists. Please include the request ID 3e1ec763-469d-44ce-bb28-b903ff940813 in your message."_
But my Pro subscription will end soon, I didn't expect it stop here..........I am afraid I cannot finish all my Pro usage due to OpenAI's issue!!!!!!!!