GLM-5.3 vs Step-5-Preview
Specs, VRAM requirements and download trends — updated 24 October 2026.
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | GLM-5.3 | Step-5-Preview |
|---|---|---|
| Deployment | Open weights · also via API | Open weights · also via API |
| Parameters | 753.3 B | 604.3 B |
| Architecture | GlmMoeDsaForCausalLM | Step5ForConditionalGeneration |
| Context length | 1,048,576 | 1,000,000 |
| Licence | other | other |
| Commercial use | Unknown | Unknown |
| Languages | 2 | — |
| Downloads 30d | 1,942,665 | 2,467 |
| Downloads all time | 3.1 M | 2 K |
| Quantizations on the Hub | SAFETENSORS | SAFETENSORS |
| Gated | No | No |
| First seen on the Hub | 2026-08-25 | 2026-09-20 |
| API input price / 1M tokens | $0.079 | $1.00 |
| API output price / 1M tokens | $1.40 | $2.70 |
| Est. cost per 1M input + 1M output tokens | $1.48 | $3.70 |
| Cached input / 1M tokens | $0.078 | $0.10 |
| AA Intelligence Index | 44.8 | 43.7 |
| AA Coding Index | 74.8 | — |
| AA Agentic Index | 53.1 | — |
| Max output tokens | 943,718 | 64,000 |
| API providers | 37 | 4 |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | Yes |
API cost
Estimated cost of 1M input + 1M output tokens via OpenRouter
GLM-5.3
$1.48
Step-5-Preview
$3.70
GLM-5.3 is 2.5× cheaper at list price.
Download trend
Daily snapshots, last 50 days (5 Sep – 24 Oct)
1.9 M1 K
GLM-5.3
Step-5-Preview
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
Step-5-Preview · fp16
806.5 GB / 24 GB
GLM-5.3 · fp16 @ 1024K ctx
15,295.6 GB / 24 GB