API cost decision in 10 seconds

GPT-4o vs Llama 3 8B Lunaris

Pick Llama 3 8B Lunaris for lower cost; pick GPT-4o only if the larger context window matters more.

Page updated:  Data confirmed:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Llama 3 8B Lunaris for lower cost; pick GPT-4o only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Llama 3 8B Lunaris is estimated at $0.07 vs $7.5 for GPT-4o, saving $7.43 (99.1% lower).

Cost-first pickLlama 3 8B Lunaris
Context-first pickGPT-4o
Sample savings$7.4399.1%
10x traffic gap$74.35

GPT-4o has more context, but Llama 3 8B Lunaris saves $7.43 on the standard workload. At 10x that traffic, the same price gap is about $74.35. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Llama 3 8B Lunaris stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickGPT-4oLlama 3 8B Lunaris
Input-heavy / RAG5M input + 500K outputLlama 3 8B Lunaris$17.5$0.23
Balanced workload1M input + 1M outputLlama 3 8B Lunaris$12.5$0.09
Output-heavy chatbot1M input + 5M outputLlama 3 8B Lunaris$52.5$0.29
Cheaper input Llama 3 8B Lunaris $2.5 vs $0.04 / 1M

Llama 3 8B Lunaris is $2.46 cheaper per 1M input tokens (98.4% lower; 62.5x difference).

Cheaper output Llama 3 8B Lunaris $10 vs $0.05 / 1M

Llama 3 8B Lunaris is $9.95 cheaper per 1M output tokens (99.5% lower; 200x difference).

Larger context GPT-4o 128K vs 8.19K

GPT-4o has 119.81K more context (15.6x larger).

Sample workload Llama 3 8B Lunaris $7.5 vs $0.07

Llama 3 8B Lunaris is $7.43 cheaper on the standard workload (99.1% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
GPT-4o Calculating… Estimated API cost
Llama 3 8B Lunaris Calculating… Estimated API cost
Cheaper for this workload Calculating… Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

Llama 3 8B Lunaris has the lower input price; Llama 3 8B Lunaris has the lower output price; GPT-4o offers the larger context window. For the 1M input plus 500K output sample, Llama 3 8B Lunaris is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $7.5 for GPT-4o and $0.07 for Llama 3 8B Lunaris.

Best Fit

Choose GPT-4o when you care most about larger context window.

Choose Llama 3 8B Lunaris when you care most about lower input-token price, and lower output-token price.

Decision Notes
  • On the standard 1M input plus 500K output workload, Llama 3 8B Lunaris is estimated at $0.07 vs $7.5 for GPT-4o, saving $7.43 (99.1% lower).
  • Llama 3 8B Lunaris is $7.43 cheaper on the standard workload (99.1% lower).
  • Llama 3 8B Lunaris is $2.46 cheaper per 1M input tokens (98.4% lower; 62.5x difference).
  • Llama 3 8B Lunaris is $9.95 cheaper per 1M output tokens (99.5% lower; 200x difference).
  • GPT-4o has 119.81K more context (15.6x larger).
Head-to-Head Specs
FeatureGPT-4o
(OpenAI)		Llama 3 8B Lunaris
(Sao10K)
Input Price
prompt tokens per 1M		$2.5$0.04
Completion Price
per 1M tokens		$10$0.05
Sample Workload Cost
1M input + 500K output		$7.5$0.07
Context Window128K8.19K
Release Date
Popularity#101#115

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionLlama 3 8B LunarisOn the standard 1M input plus 500K output workload, Llama 3 8B Lunaris is estimated at $0.07 vs $7.5 for GPT-4o, saving $7.43 (99.1% lower).
High-volume input processingLlama 3 8B LunarisLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsLlama 3 8B LunarisLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workGPT-4oA larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps
  • gpt-oss-120b (free) can replace GPT-4o when lower sample workload cost matters most: $0.
  • gpt-oss-20b (free) can replace GPT-4o when lower sample workload cost matters most: $0.
  • gpt-oss-20b can replace GPT-4o when lower sample workload cost matters most: $0.1.
  • gpt-oss-120b can replace GPT-4o when lower sample workload cost matters most: $0.13.
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GPT-4o

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