GLM 5.3 Prime

Zhipu, closed weights, released Sep 2026, run at provider defaults through OpenRouter, served by Alibaba. It built the same five pages as every model on season 0.6.1 of the Rams Index, and Rams graded each one at desktop and phone size.

Rams Index, 0 to 100

55.1

95% interval 48.8–59.5

Rank: 16of 26 models by Index; the paired intervals allow 15 to 16
Cost per page: $0.50Generation only, list price on run day
Earlier judges: 84.6Under the grade sum this board used until 10/28, GPT-5.6 Terra placed it fifth of 26 and the Claude judge second.
Grade sum: 28.93Seven 1–5 grades, out of 35
Pages judged: 1010 judge passes, 2 builds per brief
Defects per page: 6.4Text under 12px (10 of 10)

Rank 16 of 26; the data allows anywhere from 15 to 16. Within noise of Kimi K3.1 Pro: the gap to it sits inside the noise, so the board can't order them yet. Clearly behind GPT-6.1 Sol, GPT-6 Astra, Grok 4.7, Claude Fable 5.1, GPT-6.1 Terra, GLM 5.3, Claude Opus 5.5, Claude Sonnet 5.5, Mistral Large 4, GPT-6 Luna, Claude Haiku 5.5, GPT-5.6 Sol, Claude Fable 5 and Kimi K3. Clearly ahead of DeepSeek V4 Pro, Claude Opus 4.8, MiMo V2.6 Pro, Gemini 4 Argon, Gemini 3.8 Flash, MiniMax M3, Qwen 3.8 Max, Qwen 3.8 Max Prime, Muse Spark Open and Muse Wonder.

Checked against one designer · 63% agreementSeason 0.6.1New this seasonProvisional: 1.0 judge passes per page, protocol 2

Grades by dimension

The seven grades behind the Index, 1 to 5, mean of desktop and phone. The tick is the mean across all 26 models.

Hierarchy3.905 of 26
Typography4.101 of 26
Spacing3.207 of 26
Color4.151 of 26
Components3.901 of 26
Composure3.657 of 26
Craft3.951 of 26

Bars start at 2.8 and end at 4.6, the range the board uses, so small differences show.

Index by brief

The same Index on each of the five briefs, and where the model places on that brief among all 26.

Landing70.79 of 26
Dashboard61.412 of 26
Settings14.021 of 26
Pricing81.87 of 26
Article49.813 of 26

Bars run from 0 to 100.

How it ran

Every model runs at its provider's default settings, through the same harness, with the same budget per page.

Effort: DefaultThe provider’s default. We send no effort or thinking setting
Time per page: 630sMedian over every build, broken ones included
Output tokens: 56.7kMedian per page, reasoning included
Reasoning tokens: 40.9kMedian per page, as the API reports them
Broken pages: 0 of 10Every build came back as a whole page
Criticals: 20%2 of 10 scored pages had a critical issue in their first Rams code review
Built through: OpenRouterServed by Alibaba

Best and worst page

Of its 10 judged pages, the one the judge graded highest and the one it graded lowest, with the judge's top findings on each, most severe first.

Best: Pricing94.9
Index on this page, one judge pass. Brief mean 81.8.
- Price note overlaps with feature list on Pro cardModerate
- Redundant '−20%' label appears in both toggle badge and hint copyModerate
- Excess vertical gap between toggle hint and first plan cardModerate
Worst: Settings12.3
Index on this page, one judge pass. Brief mean 14.0.
- Uneven vertical rhythm between section blocksModerate
- 'Save changes' button floats without a clear anchorModerate
- Inconsistent toggle states: 'Security alerts' toggle appears mid-state (gray, not clearly on or off)Moderate