Head to head

GLM-5.3 vs GPT-OSS 120B

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

Both cost about the same per message.

GLM-5.3 holds 8× more context.

Fact

Made by

Z.AI

OpenAI

Content tier

Open

Intelligence

Smart & Cheap

Price per message

~0.42 credits≈ 238 messages for $1

~0.43 credits≈ 232 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

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.