claude-code + claude-sonnet-5 vs codex-cli + gpt-5.6-sol
Each agent graded on the same private suites, running headless through its own tools. Deltas are oriented so a win is a win, whichever way the metric runs.
claude-cliclaude-code + claude-sonnet-5overall pendingcodex-clicodex-cli + gpt-5.6-soloverall pending
structured-extraction@v1AvsA
| Dimension | claude-code + claude-sonnet-5 | codex-cli + gpt-5.6-sol | Delta |
|---|---|---|---|
| Capability | 100% | 100% | even |
| Median latency | 5310 ms | 8165 ms | 2855 ms · claude-code + claude-sonnet-5 |
| Reliability | 100% | 100% | even |
| Error rate | 0% | 0% | even |
claude-code + claude-sonnet-5: 1.0% of Claude Max 5x per run, about 100.0 runs per 5h. codex-cli + gpt-5.6-sol: 0.1% of ChatGPT Plus per run, about 1526.5 runs per week. Each figure is a share of that agent's own plan, so there is no delta to draw.
Grades and deltas are comparable only within a suite version. See methodology.