Context Window

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Glm 4p7 vs Gpt 4o Search Preview 2025 03 11

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 4p7

Tool calling

Context window

203K

202,800 tokens · ~152K words

Model page
Openai

Model

Gpt 4o Search Preview 2025 03 11

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 4p7203K
Gpt 4o Search Preview 2025 03 11128K

Glm 4p7 has about 1.6× the context window of the other in this pair.

Token calculator →Memory savings →

Glm 4p7 has 58% more context capacity (202K vs 128K tokens). Glm 4p7 is 76% cheaper on input.

Quick verdicts

Short takeaways — validate with your own workloads.

  • Long document processing

    Use Glm 4p7. Its 202K context fits entire documents without chunking (vs 128K).

  • RAG / high-volume retrieval

    Use Glm 4p7. Input tokens are 76% cheaper — critical when sending large retrieved contexts.

  • Long output (reports, code files)

    Use Glm 4p7. Its 202K 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 4p7Gpt 4o Search Preview 2025 03 11
Context window202,800 tokens (202K)128,000 tokens (128K)
Max output tokens202,800 tokens (202K)16,384 tokens (16K)
Speed tierBalancedBalanced
VisionNoYes
Function callingYesYes
Extended thinkingYesNo
Prompt cachingYesYes
Batch APINoYes
Release dateN/AN/A

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 4p7 inGlm 4p7 outGpt 4o Search Preview 2025 03 11 inGpt 4o Search Preview 2025 03 11 out
Fireworks$0.600/M$2.20/M——
Openai——$2.50/M$10.00/M

Frequently asked questions

Glm 4p7 has a larger context window: 202K 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