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GPT-4o vs Llama 3.1 8B: Pricing, Benchmarks & Verdict (2026)

Pricing verified Apr 8, 2026

⚡ Quick Answer

Compare GPT-4o and Llama 3.1 8B across pricing, benchmarks, and capabilities.

Updated: April 8, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGPT-4oLlama 3.1 8B
ProviderOpenAIMeta
Input Price / 1M tokens$2.50$0.060
Output Price / 1M tokens$10.00$0.060
Context Window
128K
128K
Max Output Tokens
16,384
4,096
Arena ELO
1,260
1,120
Coding ELO1,265N/A
TTFT (ms)
230
150
Tokens/sec
95
100
MultimodalYesNo
JSON ModeYesYes
Function CallingYesYes
VisionYesNo
When to Use GPT-4o

GPT-4o excels at general-purpose, multimodal, function-calling tasks.

Strengths:

  • Fast response times
  • Strong multimodal capabilities
  • Code execution support

Best for:

general-purposemultimodalfunction-calling
When to Use Llama 3.1 8B

Llama 3.1 8B excels at cost-effective, fast-inference tasks.

Strengths:

  • Very cheap
  • Super fast
  • Good for lightweight tasks

Best for:

cost-effectivefast-inference

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