API cost decision in 10 seconds

Llama 3.1 8B Instruct vs Qwen3 VL 8B Instruct

Pick Llama 3.1 8B Instruct for lower cost; pick Qwen3 VL 8B Instruct 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 3.1 8B Instruct for lower cost; pick Qwen3 VL 8B Instruct only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Llama 3.1 8B Instruct is estimated at $0.04 vs $0.33 for Qwen3 VL 8B Instruct, saving $0.29 (86.4% lower).

Cost-first pickLlama 3.1 8B Instruct
Context-first pickQwen3 VL 8B Instruct
Sample savings$0.2986.4%
10x traffic gap$2.85

Qwen3 VL 8B Instruct has more context, but Llama 3.1 8B Instruct saves $0.29 on the standard workload. At 10x that traffic, the same price gap is about $2.85. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Llama 3.1 8B Instruct stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickLlama 3.1 8B InstructQwen3 VL 8B Instruct
Input-heavy / RAG5M input + 500K outputLlama 3.1 8B Instruct$0.12$0.65
Balanced workload1M input + 1M outputLlama 3.1 8B Instruct$0.07$0.58
Output-heavy chatbot1M input + 5M outputLlama 3.1 8B Instruct$0.27$2.58
Cheaper input Llama 3.1 8B Instruct $0.02 vs $0.08 / 1M

Llama 3.1 8B Instruct is $0.06 cheaper per 1M input tokens (75% lower; 4x difference).

Cheaper output Llama 3.1 8B Instruct $0.05 vs $0.5 / 1M

Llama 3.1 8B Instruct is $0.45 cheaper per 1M output tokens (90% lower; 10x difference).

Larger context Qwen3 VL 8B Instruct 131.07K vs 256K

Qwen3 VL 8B Instruct has 124.93K more context (1.95x larger).

Sample workload Llama 3.1 8B Instruct $0.04 vs $0.33

Llama 3.1 8B Instruct is $0.29 cheaper on the standard workload (86.4% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Llama 3.1 8B Instruct Calculating… Estimated API cost
Qwen3 VL 8B Instruct 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 3.1 8B Instruct has the lower input price; Llama 3.1 8B Instruct has the lower output price; Qwen3 VL 8B Instruct offers the larger context window. For the 1M input plus 500K output sample, Llama 3.1 8B Instruct is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.04 for Llama 3.1 8B Instruct and $0.33 for Qwen3 VL 8B Instruct.

Best Fit

Choose Llama 3.1 8B Instruct when you care most about lower input-token price, and lower output-token price.

Choose Qwen3 VL 8B Instruct when you care most about larger context window.

Decision Notes
  • On the standard 1M input plus 500K output workload, Llama 3.1 8B Instruct is estimated at $0.04 vs $0.33 for Qwen3 VL 8B Instruct, saving $0.29 (86.4% lower).
  • Llama 3.1 8B Instruct is $0.29 cheaper on the standard workload (86.4% lower).
  • Llama 3.1 8B Instruct is $0.06 cheaper per 1M input tokens (75% lower; 4x difference).
  • Llama 3.1 8B Instruct is $0.45 cheaper per 1M output tokens (90% lower; 10x difference).
  • Qwen3 VL 8B Instruct has 124.93K more context (1.95x larger).
Head-to-Head Specs
FeatureLlama 3.1 8B Instruct
(Meta)
Qwen3 VL 8B Instruct
(Qwen)
Input Price
prompt tokens per 1M
$0.02$0.08
Completion Price
per 1M tokens
$0.05$0.5
Sample Workload Cost
1M input + 500K output
$0.04$0.33
Context Window131.07K256K
Release Date
Popularity#40#108

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionLlama 3.1 8B InstructOn the standard 1M input plus 500K output workload, Llama 3.1 8B Instruct is estimated at $0.04 vs $0.33 for Qwen3 VL 8B Instruct, saving $0.29 (86.4% lower).
High-volume input processingLlama 3.1 8B InstructLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsLlama 3.1 8B InstructLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workQwen3 VL 8B InstructA larger context window leaves more room for retrieved passages, conversation history, or source files.

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Provider catalogs

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Meta catalog

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Qwen catalog

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Llama 3.1 8B Instruct

Meta's latest class of model (Llama 3.1) launched with a variety of sizes & flavors. This 8B instruct-tuned version is fast and efficient. It has demonstrated strong performance compared to...

Qwen3 VL 8B Instruct

Qwen3-VL-8B-Instruct is a multimodal vision-language model from the Qwen3-VL series, built for high-fidelity understanding and reasoning across text, images, and video. It features improved multimodal fusion with Interleaved-MRoPE for long-horizon...