Context Window

Compare

Glm 4 5 vs GPT-4o-mini Search Preview

This page is context-first: how much text each model can take in one request. Full specs adds capabilities and limits; the pricing matrix below is only about $/million tokens from hosts that list both models.

Z Ai

Model

Glm 4 5

Tool calling

Context window

131K

131,072 tokens · ~98K words

Model page
Openai

Model

GPT-4o-mini Search Preview

Image inputTool calling

Context window

128K

128,000 tokens · ~96K words

Model page

Context window · side by side

Bar length is relative to the larger of the two windows (100% = max of this pair). This is not pricing.

Glm 4 5131K
GPT-4o-mini Search Preview128K

Glm 4 5 has about 1× the context window of the other in this pair.

Token calculator →Memory savings →

Glm 4 5 has 2% more context capacity (131K vs 128K tokens). GPT-4o-mini Search Preview is 75% cheaper on input.

Quick verdicts

Short takeaways — validate with your own workloads.

  • Long document processing

    Use Glm 4 5. Its 131K context fits entire documents without chunking (vs 128K).

  • RAG / high-volume retrieval

    Use GPT-4o-mini Search Preview. Input tokens are 75% cheaper — critical when sending large retrieved contexts.

  • Long output (reports, code files)

    Use Glm 4 5. Its 131K max output lets you generate complete artifacts in one request.

Full specs

Context, output, capabilities, and dates. Green highlights the favorable value where we compute a winner.

SpecGlm 4 5GPT-4o-mini Search Preview
Context window131,072 tokens (131K)128,000 tokens (128K)
Max output tokens131,072 tokens (131K)16,384 tokens (16K)
Speed tierBalancedFast
VisionNoYes
Function callingYesYes
Extended thinkingYesNo
Prompt cachingYesYes
Batch APINoYes
Release dateN/AMar 2025

Pricing matrix

Dollar rates only: hosts that list both models, per 1M tokens. For how much text fits, use the context section above — not this table.

ProviderGlm 4 5 inGlm 4 5 outGPT-4o-mini Search Preview inGPT-4o-mini Search Preview out
Deepinfra$0.400/M$1.60/M——
Novita$0.600/M$2.20/M——
Openai——$0.150/M$0.600/M
Z Ai$0.600/M$2.20/M——

Frequently asked questions

Glm 4 5 has a larger context window: 131K tokens vs 128K. For long documents, large codebases, or extended agent sessions, the larger context window reduces the need to chunk inputs or summarize history.

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Mem0 gives your AI long-term memory so you stop re-sending context on every call. That means you can use a smaller, faster, cheaper model — and still get better answers.

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Example: a multi-turn chat session

Without Mem0~128K tokens sent
Full history
Repeated info
Old context
With Mem0~20K tokens sent
Key memories
Current turn

80% less to send — works with any model