Context Window

Compare

Ft:gpt 4o 2024 11 20 vs Gpt 5 2 Chat Latest

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.

Openai

Model

Ft:gpt 4o 2024 11 20

Tool calling

Context window

128K

128,000 tokens · ~96K words

Model page
Openai

Model

Gpt 5 2 Chat Latest

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.

Ft:gpt 4o 2024 11 20128K
Gpt 5 2 Chat Latest128K

Same context window size for both models.

Token calculator →Memory savings →

Ft:gpt 4o 2024 11 20 and Gpt 5 2 Chat Latest have identical context windows (128K tokens). Gpt 5 2 Chat Latest is 53% cheaper on input.

Quick verdicts

Short takeaways — validate with your own workloads.

  • RAG / high-volume retrieval

    Use Gpt 5 2 Chat Latest. Input tokens are 53% cheaper — critical when sending large retrieved contexts.

Full specs

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

SpecFt:gpt 4o 2024 11 20Gpt 5 2 Chat Latest
Context window128,000 tokens (128K)128,000 tokens (128K)
Max output tokens16,384 tokens (16K)16,384 tokens (16K)
Speed tierBalancedBalanced
VisionNoYes
Function callingYesYes
Extended thinkingNoYes
Prompt cachingYesYes
Batch APIYesNo
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.

ProviderFt:gpt 4o 2024 11 20 inFt:gpt 4o 2024 11 20 outGpt 5 2 Chat Latest inGpt 5 2 Chat Latest out
Openai$3.75/M$15.00/M$1.75/M$14.00/M

Frequently asked questions

Gpt 5 2 Chat Latest has a larger context window: 128K 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.

Powered by Mem0

Use a smaller model.
Get better results.

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.

Calculate your savingsLearn about Mem0

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