Codex 0.137.0 ignores service_tier="flex" in API-key authenticated gpt-5.5 requests
Open 💬 0 comments Opened Jun 5, 2026 by c-p0st-io
What version of Codex CLI is running?
codex-cli 0.137.0
What subscription do you have?
API
Which model were you using?
gpt-5.5
What platform is your computer?
Linux 6.12.58-gentoo-x86_64 x86_64 Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz
What terminal emulator and version are you using (if applicable)?
tmux
Codex doctor report
codex doctor --json { "schemaVersion": 1, "generatedAt": "1780663917s since unix epoch", "overallStatus": "warning", "codexVersion": "0.137.0", "checks": { "app_server.status": { "id": "app_server.status", "category": "app-server", "status": "ok", "summary": "background server is not running", "details": { "control socket": "/home/i/.codex/app-server-control/app-server-control.sock", "daemon state dir": "/home/i/.codex/app-server-daemon", "mode": "ephemeral", "pid file": "/home/i/.codex/app-server-daemon/app-server.pid (missing)", "settings": "/home/i/.codex/app-server-daemon/settings.json (missing)",
"status": "not running", "update-loop pid file": "/home/i/.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": "/home/i/.codex/auth.json", "auth storage mode": "File", "stored API key": "true", "stored ChatGPT tokens": "false", "stored agent identity": "false", "stored auth mode": "api_key" }, "remediation": null, "durationMs": 0 }, "config.load": { "id": "config.load", "category": "config", "status": "ok", "summary": "config loaded", "details": { "CODEX_HOME": "/home/i/.codex", "config.toml": "/home/i/.codex/config.toml", "config.toml parse": "ok", "cwd": "/home/i/codex/letachnen", "enabled feature flags": "shell_tool, unified_exec, shell_snapshot, terminal_resize_reflow, sqlite, hooks, enable_request_compression, multi_agent, apps, tool_suggest, plugins, in_app_browser, browser_use, browser_use_external, computer_use, plugin_sharing, image_generation, skill_mcp_dependency_install, steer, guardian_approval, goals, collaboration_modes, tool_call_mcp_elicitation, personality, fast_mode, tui_app_server, workspace_dependencies", "feature flag overrides": "none", "feature flags enabled": "27", "log dir": "/home/i/.codex/log", "mcp servers": "0", "model": "gpt-5.5", "model provider": "openai", "sqlite home": "/home/i/.codex" }, "remediation": null, "durationMs": 0 }, "git.environment": { "id": "git.environment", "category": "git", "status": "ok", "summary": "git version 2.52.0", "details": { ".git entry": "directory", "PATH git #1": "/usr/bin/git", "PATH git entries": "1", "git branch": "master", "git build options": "git version 2.52.0; cpu: x86_64; no commit associated with this build; sizeof-long: 8; sizeof-size_t: 8; shell-path: /bin/sh; rust: disabled; libcurl: 8.17.0; OpenSSL: OpenSSL 3.5.4 30 Sep 2025; zlib: 1.3.1; SHA-1: SHA1_DC; SHA-256: SHA256_BLK; default-ref-format: files; default-hash: sha1", "git exec path": "/usr/libexec/git-core", "git version": "git version 2.52.0", "repo detected": "true", "repo root": "/home/i/codex/letachnen", "selected git": "/usr/bin/git" }, "remediation": null, "durationMs": 21 }, "installation": { "id": "installation", "category": "install", "status": "ok", "summary": "installation looks consistent", "details": { "PATH codex #1": "/usr/local/bin/codex", "current executable": "/home/i/codex-cli/codex-rust-v0.137.0/codex-rs/target/release/codex", "install context": "other", "managed by bun": "false", "managed by npm": "false", "managed package root": "not set" }, "remediation": null, "durationMs": 0 }, "mcp.config": { "id": "mcp.config", "category": "mcp", "status": "ok", "summary": "no MCP servers configured", "details": {}, "remediation": null, "durationMs": 0 }, "network.env": { "id": "network.env", "category": "network", "status": "ok", "summary": "network-related environment looks readable", "details": { "proxy env vars present": "HTTPS_PROXY" }, "remediation": null, "durationMs": 0 }, "network.provider_reachability": { "id": "network.provider_reachability", "category": "reachability", "status": "ok",
"summary": "active provider endpoints are reachable over HTTP",
"details": {"summary": "active provider endpoints are reachable over HTTP", 15:51:57 [149/401] "details": { "openai API base URL": "https://api.openai.com/v1 reachable (HTTP 404)", "openai API route probe": "https://api.openai.com/v1/<redacted> route exists (HTTP 401)", "reachability mode": "API key auth" }, "remediation": null, "durationMs": 1204 }, "network.websocket_reachability": { "id": "network.websocket_reachability", "category": "websocket", "status": "ok", "summary": "Responses WebSocket handshake succeeded", "details": { "DNS": "2 IPv4, 0 IPv6, first IPv4", "auth mode": "api_key", "connect timeout": "15000 ms", "endpoint": "wss://api.openai.com/v1/<redacted>", "handshake result": "HTTP 101 Switching Protocols", "model provider": "openai", "models etag present": "false", "provider name": "OpenAI", "proxy env vars present": "HTTPS_PROXY", "reasoning header": "false", "server model present": "false", "supports websockets": "true", "wire API": "responses" }, "remediation": null, "durationMs": 1781 }, "runtime.provenance": { "id": "runtime.provenance", "category": "runtime", "status": "ok", "summary": "running local build on linux-x86_64", "details": { "commit": "unknown", "current executable": "/home/i/codex-cli/codex-rust-v0.137.0/codex-rs/target/release/codex", "install method": "other", "platform": "linux-x86_64", "version": "0.137.0" }, "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": 1 }, "sandbox.helpers": { "id": "sandbox.helpers", "category": "sandbox", "status": "ok", "summary": "sandbox configuration is readable", "details": { "approval policy": "OnRequest", "codex-linux-sandbox helper": "/home/i/.codex/tmp/arg0/codex-arg0Ga8J8O/codex-linux-sandbox", "execve wrapper helper": "/home/i/.codex/tmp/arg0/codex-arg0Ga8J8O/codex-execve-wrapper", "filesystem sandbox": "restricted", "network sandbox": "restricted" }, "remediation": null, "durationMs": 0 },
"state.paths": {
"id": "state.paths", "category": "state","id": "state.paths", 15:51:57 [73/401] "category": "state", "status": "ok", "summary": "state paths and databases are inspectable", "details": { "CODEX_HOME": "/home/i/.codex (dir)", "active rollout files": "98 files, 23425935 total bytes, 239040 average bytes", "archived rollout files": "0 files, 0 total bytes, 0 average bytes", "goals DB": "/home/i/.codex/goals_1.sqlite (file)", "goals DB integrity": "ok", "log DB": "/home/i/.codex/logs_2.sqlite (file)", "log DB integrity": "ok", "log dir": "/home/i/.codex/log (dir)", "memories DB": "/home/i/.codex/memories_1.sqlite (file)", "memories DB integrity": "ok", "sqlite home": "/home/i/.codex (dir)", "state DB": "/home/i/.codex/state_5.sqlite (file)", "state DB integrity": "ok" }, "remediation": null, "durationMs": 581 }, "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": "80", "rollout DB active rows": "80", "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=74, ollama-launch=4, ollama=2", "rollout DB rows": "80", "rollout DB scan cap reached": "false", "rollout DB scan error sample": [ "/home/i/.codex/sessions/2025/09/09/rollout-2025-09-09T15-29-26-e9734513-0170-43da-80c3-a2faf6367609.jsonl (no parseable rollout items)", "/home/i/.codex/sessions/2025/09/09/rollout-2025-09-09T15-27-50-b71783d9-8d9f-4db7-8dfb-edc2934d4ee5.jsonl (no parseable rollout items)", "/home/i/.codex/sessions/2025/09/09/rollout-2025-09-09T15-29-53-54970af1-21a6-45b3-b7fb-0b7eb117d4f6.jsonl (no parseable rollout items)", "/home/i/.codex/sessions/2025/09/01/rollout-2025-09-01T00-46-57-18204896-5933-437e-ab84-90b4b9df7f94.jsonl (no parseable rollout items)", "/home/i/.codex/sessions/2025/09/01/rollout-2025-09-01T02-49-06-2ad48276-7586-4755-86c1-dc4488419a69.jsonl (no parseable rollout items)" ], "rollout DB scan errors": "18", "rollout DB sources": "cli=80", "rollout DB stale rows": "0" }, "issues": [ { "severity": "warning", "cause": "rollout scan was incomplete or found bad files", "measured": "18 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": 263 }, "system.environment": { "id": "system.environment", "category": "system",
"status": "ok", "summary": "OS language en-US",
"details": { "LANG": "en_US.utf8","category": "system", 15:51:57 [0/401] "status": "ok", "summary": "OS language en-US", "details": { "LANG": "en_US.utf8", "os": "Gentoo Linux 2.18.0 [64-bit]", "os language": "en-US", "os type": "Gentoo Linux", "os version": "2.18.0" }, "remediation": null, "durationMs": 11 }, "terminal.env": { "id": "terminal.env", "category": "terminal", "status": "ok", "summary": "terminal metadata was detected", "details": { "COLORTERM": "truecolor", "DISPLAY": "present", "TERM": "screen-256color", "TERM_PROGRAM": "tmux", "color output": "enabled", "effective locale": "en_US.utf8", "multiplexer": "tmux 3.5a", "stderr is terminal": "true", "stdin is terminal": "true", "stdout is terminal": "true", "terminal": "unknown", "terminal size": "88x60", "terminal version": "3.6a", "tmux allow-passthrough": "off", "tmux client termname": "screen-256color", "tmux client termtype": "tmux 3.6a", "tmux extended-keys": "off", "tmux focus-events": "off", "tmux set-clipboard": "external", "tmux xterm-keys": "on" }, "remediation": null, "durationMs": 51 }, "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": "letachnen", "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": "0.137.0", "check for update on startup": "true", "last checked at": "2026-06-05T12:13:32.510331010Z", "latest version": "0.137.0", "latest version status": "current version is not older", "update action": "manual or unknown", "version cache": "/home/i/.codex/version.json" }, "remediation": null, "durationMs": 757
} }
}What issue are you seeing?
What version of Codex CLI is running?
OpenAI Codex v0.137.0
Which model were you using?
gpt-5.5
What issue are you seeing?
Codex appears to ignore service_tier = "flex" for API-key authenticated requests.
Direct /v1/responses with the same OPENAI_API_KEY returns service_tier: "flex", but Codex requests made with the same key and explicit -c 'service_tier="flex"' show up in Usage/Billing as default.
Direct API proof
Request:
curl -sS https://api.openai.com/v1/responses \
-H "Authorization: Bearer $OPENAI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.5",
"input": "Say ok.",
"service_tier": "flex",
"reasoning": {"effort": "high"}
}'
Response includes:
{
"model": "gpt-5.5-2026-04-23",
"reasoning": {"effort": "high"},
"service_tier": "flex",
"usage": {
"input_tokens": 9,
"total_tokens": 25
}
}
Codex repro
mkdir -p ~/.cache/codex-flex-test/home ~/.cache/codex-flex-test/work
CODEX_HOME="$HOME/.cache/codex-flex-test/home" \
CODEX_API_KEY="$OPENAI_API_KEY" \
codex exec --skip-git-repo-check --cd "$HOME/.cache/codex-flex-test/work" \
-c 'model="gpt-5.5"' \
-c 'model_reasoning_effort="high"' \
-c 'service_tier="flex"' \
"Reply exactly: FLEX_PROBE_1780661124"
Codex output shows:
- model: gpt-5.5
- provider: openai
- reasoning effort: high
- tokens used: 138
Actual behavior
The direct API request appears in Usage/Billing as Flex tier, but Codex requests appear as Default tier.
Expected behavior
Codex should either:
- send
service_tier: "flex"to the Responses API when configured, or - reject/warn if
service_tieris unsupported for this execution path.
Additional context
There is no project config. The repro uses a clean CODEX_HOME and CODEX_API_KEY.
What steps can reproduce the bug?
What version of Codex CLI is running?
OpenAI Codex v0.137.0
Which model were you using?
gpt-5.5
What issue are you seeing?
Codex appears to ignore service_tier = "flex" for API-key authenticated requests.
Direct /v1/responses with the same OPENAI_API_KEY returns service_tier: "flex", but Codex requests made with the same key and explicit -c 'service_tier="flex"' show up in Usage/Billing as default.
Direct API proof
Request:
curl -sS https://api.openai.com/v1/responses \
-H "Authorization: Bearer $OPENAI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.5",
"input": "Say ok.",
"service_tier": "flex",
"reasoning": {"effort": "high"}
}'
Response includes:
{
"model": "gpt-5.5-2026-04-23",
"reasoning": {"effort": "high"},
"service_tier": "flex",
"usage": {
"input_tokens": 9,
"total_tokens": 25
}
}
Codex repro
mkdir -p ~/.cache/codex-flex-test/home ~/.cache/codex-flex-test/work
CODEX_HOME="$HOME/.cache/codex-flex-test/home" \
CODEX_API_KEY="$OPENAI_API_KEY" \
codex exec --skip-git-repo-check --cd "$HOME/.cache/codex-flex-test/work" \
-c 'model="gpt-5.5"' \
-c 'model_reasoning_effort="high"' \
-c 'service_tier="flex"' \
"Reply exactly: FLEX_PROBE_1780661124"
Codex output shows:
- model: gpt-5.5
- provider: openai
- reasoning effort: high
- tokens used: 138
Actual behavior
The direct API request appears in Usage/Billing as Flex tier, but Codex requests appear as Default tier.
Expected behavior
Codex should either:
- send
service_tier: "flex"to the Responses API when configured, or - reject/warn if
service_tieris unsupported for this execution path.
Additional context
There is no project config. The repro uses a clean CODEX_HOME and CODEX_API_KEY.
What is the expected behavior?
_No response_
Additional information
_No response_