LLMversus

Grok 3 vs o3: Pricing, Benchmarks & Verdict (2026)

Pricing verified Aug 10, 2026By LLMversusUpdated August 11, 2026View methodology

⚡ Quick Answer

Compare Grok 3 and o3 across pricing, benchmarks, and capabilities.

Updated: August 10, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGrok 3o3
ProviderxAIOpenAI
Input Price / 1M tokens$3.00$2.00
Output Price / 1M tokens$15.00$8.00
Context Window
200K
200K
Max Output Tokens
8,192
100,000
Arena ELO
1,285
1,340
Coding ELO
1,280
1,320
TTFT (ms)
200
600
Tokens/sec
90
15
MultimodalNoNo
JSON ModeYesYes
Function CallingYesYes
VisionNoNo
When to Use Grok 3

Grok 3 excels at general-purpose, coding, reasoning tasks.

Strengths:

  • Latest xAI model
  • Strong reasoning
  • Large context

Best for:

general-purposecodingreasoning
When to Use o3

o3 excels at reasoning, coding, math tasks.

Strengths:

  • Highest reasoning capability
  • Best math performance
  • Code execution

Best for:

reasoningcodingmath

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