System record
GPT-5.5, xHigh reasoning / Codex CLI
Organization: OpenAI · base model: GPT-5.5, xHigh reasoning / Codex CLI
System and setup
| Model version | not reported |
|---|---|
| Software used to run the model | Codex CLI, xHigh reasoning |
| Software version | not reported |
| Tools available to the model | One H100 per base-model × target-benchmark run; benchmark evaluator and decontamination checker |
| Release date | Not reported |
Autonomy assessments
No autonomy assessment is published for this system.
Published capability results
| Measure | Version | Reported result | Date |
|---|---|---|---|
| PostTrainBench | PostTrainBench v1.1 · September 2026 results | 27.23% | 2026-09-18 |
Related research
Additional system details
- System ID
- ptb-v11-gpt-5-5-xhigh
- Organization
- OpenAI
- Base model
- GPT-5.5, xHigh reasoning / Codex CLI
- Release date
- Not reported
- Assessment records
- 0
- Recursive evidence records
- 0