Context Window

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Deepseek R1 Basic vs GPT-4o 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.

Deepseek

Model

Deepseek R1 Basic

Context window

128K

128,000 tokens · ~96K words

Model page
Openai

Model

GPT-4o 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.

Deepseek R1 Basic128K
GPT-4o Search Preview128K

Same context window size for both models.

Token calculator →Memory savings →

Deepseek R1 Basic and GPT-4o Search Preview have identical context windows (128K tokens). Deepseek R1 Basic is 78% cheaper on input.

Quick verdicts

Short takeaways — validate with your own workloads.

  • RAG / high-volume retrieval

    Use Deepseek R1 Basic. Input tokens are 78% cheaper — critical when sending large retrieved contexts.

  • Long output (reports, code files)

    Use Deepseek R1 Basic. Its 20K 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.

SpecDeepseek R1 BasicGPT-4o Search Preview
Context window128,000 tokens (128K)128,000 tokens (128K)
Max output tokens20,480 tokens (20K)16,384 tokens (16K)
Speed tierDeepBalanced
VisionNoYes
Function callingNoYes
Extended thinkingNoNo
Prompt cachingNoYes
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.

ProviderDeepseek R1 Basic inDeepseek R1 Basic outGPT-4o Search Preview inGPT-4o Search Preview out
Fireworks$0.550/M$2.19/M——
Openai——$2.50/M$10.00/M

Frequently asked questions

GPT-4o Search Preview 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