Head to head

GLM-5.3 Flash vs Grok 4 Fast

Price, context, inputs and filters. No benchmarks theatre.

GLM-5.3 Flash costs 1.3× less per message.

Both hold the same amount of context.

Fact

Made by

Z.AI

X-AI

Content tier

Open

Intelligence

Quick

Price per message

~0.41 credits≈ 243 messages for $1

~0.52 credits≈ 192 messages for $1

Context window

1M tokens≈ 1,613 pages of text in one go

1M tokens≈ 1,538 pages of text in one go

Reads

Text, Images, Video

Text, Images

Writes

Text

Tool use

Yes - search, memory, code and more

Served via

OpenRouter, Unbottled AI

Status

Current

A typical message: 16K tokens in, 1.5K out. Short replies cost less. 1 credit = $0.01.