PHP code review: which models catch the bugs
Of the 17 models ranked on PHP code, 5 models tied for the most known bugs: 100%. 9 of the other 12 models have 95% intervals that overlap theirs. Gemini 3.5 Flash-Lite caught the fewest, 0%. Together they caught 64% of known bugs in PHP code, against 60% for the same 17 across the whole benchmark.
| Model | Caught here | Every bug | Difference |
|---|---|---|---|
| Claude Opus 5.5 | 100% | 90% | +10 pts |
| GPT-6.1 Sol | 100% | 89% | +11 pts |
| Gemini 4 Argon | 100% | 82% | +18 pts |
| GPT-5.6 Sol | 100% | 72% | +28 pts |
| Claude Haiku 5.5 | 100% | 64% | +36 pts |
| DeepSeek V4 Flash (Workers AI) | 78%[33%–100%] | 49% | +29 pts |
| DeepSeek V4 Pro (Workers AI) | 69%[33%–100%] | 54% | +15 pts |
| Claude Sonnet 5.5 | 67%[0%–100%] | 77% | −10 pts |
| GPT-6 Luna | 67%[0%–100%] | 67% | 0 pts |
| Gemini 3.1 Pro | 67%[0%–100%] | 67% | 0 pts |
| Gemini 3.8 Flash | 50%[0%–100%] | 68% | −18 pts |
| GLM-5.3 (Workers AI) | 44%[0%–100%] | 61% | −17 pts |
| Kimi K2.7 Code (Workers AI) | 42%[25%–75%] | 38% | +4 pts |
| GLM-5.3 Flash (Workers AI) | 33%[0%–100%] | 61% | −28 pts |
| GPT-OSS 120B (Workers AI) | 33%[0%–67%] | 40% | −7 pts |
| Gemma 4 26B A4B (Workers AI) | 33%[0%–100%] | 26% | +7 pts |
| Gemini 3.5 Flash-Lite | 0% | 11% | −11 pts |
PHP was the sixth-easiest of the 12 languages for these models.
Claude Haiku 5.5 gains the most here: 100%, against 64% over every bug.
GLM-5.3 Flash drops the most: 33%, against 61% over every bug.
The change “Fix collection filtering API for IN/NOT IN comparisons that require type conversions” in doctrine/orm, a change of 100 to 300 lines that landed in October 2025, introduced a logic bug that a later upstream commit fixed.
Claude Opus 5.5, GPT-6.1 Sol, Gemini 4 Argon, GPT-5.6 Sol, Gemini 3.8 Flash, GPT-6 Luna, Claude Haiku 5.5, Gemini 3.1 Pro and DeepSeek V4 Flash (Workers AI) caught it; GLM-5.3, DeepSeek V4 Pro (Workers AI), GPT-OSS 120B (Workers AI) and Kimi K2.7 Code (Workers AI) caught it in part; Claude Sonnet 5.5, GLM-5.3 Flash, Gemma 4 26B A4B and Gemini 3.5 Flash-Lite missed it.