Context Window

Compare

DeepSeek V4 Flash Latest vs Grok 4 20 0309

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 V4 Flash Latest

Tool calling

Context window

1.3M

1,310,720 tokens · ~983K words

Model page
Xai

Model

Grok 4 20 0309

Image inputTool calling

Context window

1M

1,000,000 tokens · ~750K 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 V4 Flash Latest1.3M
Grok 4 20 03091M

DeepSeek V4 Flash Latest has about 1.3× the context window of the other in this pair.

Token calculator →Memory savings →

DeepSeek V4 Flash Latest has 31% more context capacity (1310K vs 1000K tokens). DeepSeek V4 Flash Latest is 96% cheaper on input.

Quick verdicts

Short takeaways — validate with your own workloads.

  • Long document processing

    Use DeepSeek V4 Flash Latest. Its 1310K context fits entire documents without chunking (vs 1000K).

  • RAG / high-volume retrieval

    Use DeepSeek V4 Flash Latest. Input tokens are 96% cheaper — critical when sending large retrieved contexts.

  • Long output (reports, code files)

    Use Grok 4 20 0309. Its 1000K 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 V4 Flash LatestGrok 4 20 0309
Context window1,310,720 tokens (1310K)1,000,000 tokens (1000K)
Max output tokens393,216 tokens (393K)1,000,000 tokens (1000K)
Speed tierFastBalanced
VisionNoYes
Function callingYesYes
Extended thinkingYesYes
Prompt cachingYesYes
Batch APINoNo
Release dateAug 2026N/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.

ProviderDeepSeek V4 Flash Latest inDeepSeek V4 Flash Latest outGrok 4 20 0309 inGrok 4 20 0309 out
Openrouter$0.040/M$0.640/M——
Xai——$1.25/M$2.50/M

Frequently asked questions

DeepSeek V4 Flash Latest has a larger context window: 1310K tokens vs 1000K. 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