Context Window

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Deepseek R1 Distill Qwen 1p5b vs Gpt 4o Realtime Preview 2025 06 03

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.

Alibaba

Model

Deepseek R1 Distill Qwen 1p5b

Context window

131K

131,072 tokens · ~98K words

Model page
Openai

Model

Gpt 4o Realtime Preview 2025 06 03

Tool 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 Distill Qwen 1p5b131K
Gpt 4o Realtime Preview 2025 06 03128K

Deepseek R1 Distill Qwen 1p5b has about 1× the context window of the other in this pair.

Token calculator →Memory savings →

Deepseek R1 Distill Qwen 1p5b has 2% more context capacity (131K vs 128K tokens). Deepseek R1 Distill Qwen 1p5b is 98% cheaper on input.

Quick verdicts

Short takeaways — validate with your own workloads.

  • Long document processing

    Use Deepseek R1 Distill Qwen 1p5b. Its 131K context fits entire documents without chunking (vs 128K).

  • RAG / high-volume retrieval

    Use Deepseek R1 Distill Qwen 1p5b. Input tokens are 98% cheaper — critical when sending large retrieved contexts.

  • Long output (reports, code files)

    Use Deepseek R1 Distill Qwen 1p5b. Its 131K 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 Distill Qwen 1p5bGpt 4o Realtime Preview 2025 06 03
Context window131,072 tokens (131K)128,000 tokens (128K)
Max output tokens131,072 tokens (131K)4,096 tokens (4K)
Speed tierDeepBalanced
VisionNoNo
Function callingNoYes
Extended thinkingNoNo
Prompt cachingNoYes
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.

ProviderDeepseek R1 Distill Qwen 1p5b inDeepseek R1 Distill Qwen 1p5b outGpt 4o Realtime Preview 2025 06 03 inGpt 4o Realtime Preview 2025 06 03 out
Fireworks$0.100/M$0.100/M——
Openai——$5.00/M$20.00/M

Frequently asked questions

Deepseek R1 Distill Qwen 1p5b has a larger context window: 131K 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