Head to head

GLM-5.3 Flash vs GLM 4.5 AIR

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

Swap sides

GLM-5.3 Flash costs 1.6× less per message.

GLM-5.3 Flash holds 8× more context.

Fact

GLM-5.3 FlashZ.AI

OpenChat with GLM-5.3 Flash

GLM 4.5 AIRZ.AI

OpenChat with GLM 4.5 AIR

Made by

Z.AI

Content tier

Open

Intelligence

Quick

Estimated price per message

~0.41 credits≈ 243 messages for $1

~0.64 credits≈ 156 messages for $1

Context window

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

131K tokens≈ 202 pages of text in one go

Reads

Text, Images, Video

Text

Writes

Text

Tool use

Yes - search, memory, code and more

Served via

OpenRouter, Unbottled AI

Status

Current

Legacy

A typical message: 16K tokens in, 1.5K out. Short replies cost less. Models served via OpenRouter bill the real provider cost plus our markup, so actual charges vary. 1 credit = $0.01.

GLM-5.3 Flash details GLM 4.5 AIR details