Is Codex down or slower today?
As of · an hourly probe of Codex CLI (GPT-6 Luna) on the ChatGPT Free plan, one account, from one EU server · not an official status page
Codex on the ChatGPT Free plan: answering
Last hourly probe — GPT-6 Luna: answered in 22.2 s at 13:37 UTC
Is Codex answering on the ChatGPT Free plan right now? With GPT-6 Luna: yes — our last probe, at 13:37 UTC, answered in 22.2 s; 0 of 3 calls failed in the last 24 hours. This is an hourly probe of one account from one EU server, not a status page: it can miss an outage between probes and does not see problems that hit other accounts or regions. Is Codex slower today? Codex CLI (GPT-6 Luna): measuring, 3 samples in the last 24 hours; no verdict until the 7-day baseline is in.
Also: Codex vs Claude Code, side by side · all coding agents · Is Claude Code down or slower today? · Is Antigravity CLI down or slower today?
Is Codex slower today?
Each model is compared only with its own last 7 days on one fixed task with a single exact answer.
Codex CLI · GPT-6 Luna: measuring — the 7-day baseline is still filling up
Last measured 2026-11-11 13:37 UTC · codex 0.156.1 · effort high · ChatGPT Free plan · errors in 24 h: 0% · requested gpt-6-luna; the CLI does not report which model answered, so a silent substitution would not be visible · measured on the ChatGPT Free plan with its default model since 2026-11-11; GPT-6 Astra on the Pro plan was measured until 2026-10-22 and its history is kept apart from this series
| Metric | Last 24 h | 7 days before | Change | Verdict |
|---|---|---|---|---|
| Speed | — tokens/s | — | — | measuring, no verdict yet |
| Thinking | — tokens | — | — | measuring, no verdict yet |
| First token | — | — | — | measuring, no verdict yet |
Speed is output tokens (thinking included) per second of response time. A change counts as significant only when the median moves by at least 15% and a Mann-Whitney test gives p < 0.01, with at least 12 recent and 48 baseline samples. These numbers are not comparable with other agents: Claude Code reports API time while Codex and Antigravity CLI report turn time, Antigravity CLI does not stream thinking, and the tokenizers differ, so the same number means different things.
Hourly speed, last 7 days
Codex CLI · GPT-6 Luna
Daily medians
| UTC day | GPT-6 Luna tokens/s | thinking |
|---|---|---|
| 2026-11-11 | 50.7 | 902 |
How long does Codex take to answer?
| Model | Median, 24 h | Median, 7 days | Failed, 24 h | Failed, 7 days |
|---|---|---|---|---|
| GPT-6 Luna | 22.2 s 3 runs, too few | 22.2 s 3 runs, too few | 0 of 3 | 0 of 3 |
End to end on our fixed task: from launching the CLI to the complete answer, by our own clock. The same task in the other agents: Codex vs Claude Code, side by side.
"Too few": not enough successful runs yet to compare with other agents. "Failed": calls that errored, timed out, were rate-limited or could not count as a clean measurement.
Has it got worse at hard questions?
- Codex CLI (GPT-6 Luna): 9/20 correct (45%) so far; the baseline is still being collected (day 1 of 10), so no verdict until 2026-11-21.
A fixed panel of hard questions, judged against each model's own baseline; details on all coding agents.
Is this the official status?
No. This is an hourly probe of one account from one EU server, not a status page: it can miss an outage between probes and does not see problems that hit other accounts or regions. The vendor's own incident reports: status.openai.com. The vendor's developer API, measured separately every 5 minutes from 4 regions: Is the OpenAI API down? — access through the ChatGPT Free plan is a different service with its own limits, so the two can differ.
Questions
Is Codex down right now?
With GPT-6 Luna: not on our account — our last probe, at 13:37 UTC, answered in 22.2 s; 0 of 3 calls failed in the last 24 hours. This is an hourly probe of one account from one EU server, not a status page: it can miss an outage between probes and does not see problems that hit other accounts or regions. For the vendor's own incident reports, see status.openai.com.
Is Codex slower today?
Codex CLI (GPT-6 Luna): measuring, 3 samples in the last 24 hours; no verdict until the 7-day baseline is in.
How long does Codex take to answer?
On our fixed task, end to end, Codex took a median of 22.2 s (3 runs, too few to compare) over the last 24 hours and 22.2 s (3 runs, too few to compare) over 7 days with GPT-6 Luna. The same task in the other agents: Codex vs Claude Code, side by side.
Has GPT-6 Luna in Codex CLI got worse at hard questions?
Codex CLI (GPT-6 Luna): 9/20 correct (45%) so far; the baseline is still being collected (day 1 of 10), so no verdict until 2026-11-21.
Which model and plan does this page measure?
Codex CLI with GPT-6 Luna (effort high), on the ChatGPT Free plan, CLI codex 0.156.1; one account, one EU server.
How it is measured
- What
- Codex CLI with GPT-6 Luna (effort high); tools disabled or denied by permission policy, a fresh isolated session per call, on the ChatGPT Free plan.
- When
- every hour at :37 UTC, one fixed task per agent.
- Where
- one server in the EU (Hetzner, Germany); a single account per vendor.
- Errors
- a failed call is 'not measured', never a wrong answer.
- Data
- /api/coding-agents.json (JSON, CC BY 4.0) · markdown