GLM-5.3-Flash vs Solar Pro 4

API pricing, benchmark indices and specs — updated 30 October 2026.

zai-org · A · Open weights

Params

321.3 B

Context

—

30d

6.4 M

mit · commercial OK

upstage · B · API-only

Input / 1M

$0.15

Output / 1M

$0.60

AA index

28.2

proprietary · 524.3K context

Specification comparison

Differences are highlighted; identical values are muted.

Specification	GLM-5.3-Flash	Solar Pro 4
Deployment	Open weights · also via API	API-only (closed weights)
Parameters	321.3 B	n/a — API-only
Architecture	Glm5NextForConditionalGeneration	n/a — API-only
Context length	1,048,575	524,288
Licence	mit	Proprietary
Commercial use	Allowed	Per API terms
Languages	2	n/a — API-only
Downloads 30d	6,388,408	n/a — API-only
Downloads all time	14.2 M	n/a — API-only
Quantizations on the Hub	SAFETENSORS	n/a — API-only
Gated	No	n/a — API-only
First seen on the Hub	2026-08-25	n/a — API-only
API input price / 1M tokens	$0.15	$0.15
API output price / 1M tokens	$0.50	$0.60
Est. cost per 1M input + 1M output tokens	$0.65	$0.75
Cached input / 1M tokens	$0.03	$0.03
AA Intelligence Index	27.8	28.2
AA Coding Index	71.5	52.7
AA Agentic Index	50.9	—
Max output tokens	943,717	131,072
API providers	37	1
Tool calling	Yes	Yes
Reasoning mode	Yes	Yes

Estimated cost of 1M input + 1M output tokens via OpenRouter

GLM-5.3-Flash $0.65

Solar Pro 4 $0.75

GLM-5.3-Flash is 1.2× cheaper at list price.

On RTX 4090 · 24 GB · 8K context unless noted

GLM-5.3-Flash · fp16 409.9 GB / 24 GB

❌ Won’t fit