Codex
GPT-5.5
Inside Codex we ask for gpt-5.5 every hour. Everything below comes from those runs on our lab machine.
Write speed, last 24 hours
24.7wall tok/s
Tokens per second across the whole command — you press enter, the app starts, thinks, writes, finishes. Higher is better. This is the middle value of 34 clean rounds out of 34 tried in the last 24 hours.
- Time to first word
- —
- This app does not stream text, so we cannot time the first word.
- Middle wall time
- 10.4s
- How long the whole command took, start to finish, including the app booting. Lower is faster.
- Last ping
- —
- The newest tiny “reply ok” check. It measures wake-up time, not writing speed.
What stands out
Four facts pulled straight from the saved runs.
- Board position
- #7 of 10
- Just ahead: Fable 5 at 30.3 wall tok/s. Just behind: GPT-5.6 Terra at 22.7 wall tok/s.
- Rounds that worked
- 34/34
- Clean rounds out of rounds tried, in the last 24 hours.
- Served as
- not echoed
- This app does not echo a model name back, so we cannot confirm it.
- Round-to-round swing
- 1.7×
- How much the fastest round beat the slowest one. A big swing means a noisy day.
Recent rounds
Newest first. Fails stay in the list with their reason.
| When | Result | Wall tok/s |
|---|---|---|
| just now | okno tool items | 26.7 |
| 1h ago | okno tool items | 24.3 |
| 2h ago | okno tool items | 20.6 |
| 3h ago | okno tool items | 29.9 |
| 4h ago | okno tool items | 24.7 |
| 5h ago | okno tool items | 21.8 |
| 6h ago | okno tool items | 27.9 |
| 7h ago | okno tool items | 19.9 |
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How to read this
Every number here comes from our lab machine running the paid app, one try per hourly round, on test kit v6. Our measurements, not the vendor’s.