LLMversus

ChatGPT-4o Latest vs Llama 3.1 405B (Together): Pricing, Benchmarks & Verdict (2026)

Pricing verified Sep 14, 2026By LLMversusUpdated September 17, 2026View methodology

⚡ Quick Answer

Compare ChatGPT-4o Latest and Llama 3.1 405B (Together) across pricing, benchmarks, and capabilities.

Updated: September 14, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureChatGPT-4o LatestLlama 3.1 405B (Together)
ProviderOpenAITogether AI
Input Price / 1M tokens$5.00$3.50
Output Price / 1M tokens$15.00$3.50
Context Window
128K
4K
Max Output Tokens
16,384
4,096
Arena ELO
1,265
1,240
Coding ELO
1,270
1,200
TTFT (ms)
150
150
Tokens/sec
100
100
MultimodalYesNo
JSON ModeYesYes
Function CallingYesYes
VisionNoNo
When to Use ChatGPT-4o Latest

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

Strengths:

  • Latest GPT-4o
  • Improved performance
  • Always updated

Best for:

general-purposemultimodalfunction-calling
When to Use Llama 3.1 405B (Together)

Llama 3.1 405B (Together) excels at general-purpose, reasoning tasks.

Strengths:

  • Largest model
  • High quality
  • Good pricing

Best for:

general-purposereasoning

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