Context Window

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GPT-4 Turbo Preview vs Meta Llama3 1 8b Instruct

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-4 Turbo Preview

Tool calling

Context window

128K

128,000 tokens · ~96K words

Model page
Meta

Model

Meta Llama3 1 8b Instruct

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.

GPT-4 Turbo Preview128K
Meta Llama3 1 8b Instruct128K

Same context window size for both models.

Token calculator →Memory savings →

GPT-4 Turbo Preview and Meta Llama3 1 8b Instruct have identical context windows (128K tokens). Meta Llama3 1 8b Instruct is 97% cheaper on input.

Quick verdicts

Short takeaways — validate with your own workloads.

  • RAG / high-volume retrieval

    Use Meta Llama3 1 8b Instruct. Input tokens are 97% cheaper — critical when sending large retrieved contexts.

  • Long output (reports, code files)

    Use GPT-4 Turbo Preview. Its 4K 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-4 Turbo PreviewMeta Llama3 1 8b Instruct
Context window128,000 tokens (128K)128,000 tokens (128K)
Max output tokens4,096 tokens (4K)2,048 tokens (2K)
Speed tierBalancedFast
VisionNoNo
Function callingYesYes
Extended thinkingNoNo
Prompt cachingNoNo
Batch APIYesNo
Release dateJan 2024N/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-4 Turbo Preview inGPT-4 Turbo Preview outMeta Llama3 1 8b Instruct inMeta Llama3 1 8b Instruct out
Aws Bedrock——$0.220/M$0.220/M
Openai$10.00/M$30.00/M——

Frequently asked questions

Meta Llama3 1 8b Instruct 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