Context Window

Compare

Gpt 5 3 Chat Latest vs Gpt 5 Search Api 2025 10 14

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

Gpt 5 3 Chat Latest

Image inputTool calling

Context window

128K

128,000 tokens · ~96K words

Model page
Openai

Model

Gpt 5 Search Api 2025 10 14

Image inputTool calling

Context window

272K

272,000 tokens · ~204K 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.

Gpt 5 3 Chat Latest128K
Gpt 5 Search Api 2025 10 14272K

Gpt 5 Search Api 2025 10 14 has about 2.1× the context window of the other in this pair.

Token calculator →Memory savings →

Gpt 5 Search Api 2025 10 14 has 112% more context capacity (272K vs 128K tokens). Gpt 5 Search Api 2025 10 14 is 28% cheaper on input.

Quick verdicts

Short takeaways — validate with your own workloads.

  • Long document processing

    Use Gpt 5 Search Api 2025 10 14. Its 272K context fits entire documents without chunking (vs 128K).

  • RAG / high-volume retrieval

    Use Gpt 5 Search Api 2025 10 14. Input tokens are 28% cheaper — critical when sending large retrieved contexts.

  • Long output (reports, code files)

    Use Gpt 5 Search Api 2025 10 14. Its 128K 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.

SpecGpt 5 3 Chat LatestGpt 5 Search Api 2025 10 14
Context window128,000 tokens (128K)272,000 tokens (272K)
Max output tokens16,384 tokens (16K)128,000 tokens (128K)
Speed tierBalancedBalanced
VisionYesYes
Function callingYesYes
Extended thinkingYesNo
Prompt cachingYesYes
Batch APINoNo
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.

ProviderGpt 5 3 Chat Latest inGpt 5 3 Chat Latest outGpt 5 Search Api 2025 10 14 inGpt 5 Search Api 2025 10 14 out
Openai$1.75/M$14.00/M$1.25/M$10.00/M

Frequently asked questions

Gpt 5 Search Api 2025 10 14 has a larger context window: 272K 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