Context Window

Compare

Llama 3 1 8b Instant vs Phi 3 Mini 128k

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.

Meta

Model

Llama 3 1 8b Instant

Tool calling

Context window

128K

128,000 tokens · ~96K words

Model page
Microsoft

Model

Phi 3 Mini 128k

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.

Llama 3 1 8b Instant128K
Phi 3 Mini 128k128K

Same context window size for both models.

Token calculator →Memory savings →

Llama 3 1 8b Instant and Phi 3 Mini 128k have identical context windows (128K tokens). Llama 3 1 8b Instant is 50% cheaper on input.

Quick verdicts

Short takeaways — validate with your own workloads.

  • RAG / high-volume retrieval

    Use Llama 3 1 8b Instant. Input tokens are 50% cheaper — critical when sending large retrieved contexts.

  • Long output (reports, code files)

    Use Llama 3 1 8b Instant. Its 8K 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.

SpecLlama 3 1 8b InstantPhi 3 Mini 128k
Context window128,000 tokens (128K)128,000 tokens (128K)
Max output tokens8,192 tokens (8K)4,096 tokens (4K)
Speed tierFastFast
VisionNoNo
Function callingYesNo
Extended thinkingNoNo
Prompt cachingNoNo
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.

ProviderLlama 3 1 8b Instant inLlama 3 1 8b Instant outPhi 3 Mini 128k inPhi 3 Mini 128k out
Azure——$0.130/M$0.520/M
Fireworks——$0.100/M$0.100/M
Groq$0.050/M$0.080/M——

Frequently asked questions

Phi 3 Mini 128k 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