Head-to-head
command-r:35b vs GPT-5.5 (Codex)
Both models answered the same one-shot tasks under identical rules — no retries, answers published unedited. Two separate axes, never blended: does the code actually run, and how do blind-scored text answers hold up against a written gold answer. Frontier references sit outside the blind field and are deliberately unscored on text.
| Model | Runnable sims | Blind text avg | Failure modes |
|---|---|---|---|
| command-r:35b | 26% (22/85) | 7.25 (20 scored) | ERR 29 · STAT 10 · BLANK 8 · HANG 3 · DNF 13 |
| GPT-5.5 (Codex) frontier reference | 95% (81/85) | unscored by design | ERR 2 · STAT 1 · BLANK 1 |
Biggest contrasts
Rounds where the two models diverged most — open them and read both answers side by side.
| Round | command-r:35b | GPT-5.5 (Codex) |
|---|---|---|
| R155 · Linked list with animated pointer relinking | DNF | OK |
| R154 · Ring buffer with producer and consumer at different rates | DNF | OK |
| R151 · Binary search tree growing node by node | DNF | OK |
| R140 · Water sloshing in a tilting container | DNF | OK |
| R138 · Two-source wave interference pattern | DNF | OK |
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Generated 2026-07-31 from the published rounds. Harness failures are excluded from every base — a broken cluster node is our fault, not the model's.