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GPT-4.5 vs Grok 3: Pricing, Benchmarks & Verdict (2026)

Pricing verified Apr 8, 2026

⚡ Quick Answer

Compare GPT-4.5 and Grok 3 across pricing, benchmarks, and capabilities.

Updated: April 8, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGPT-4.5Grok 3
ProviderOpenAIxAI
Input Price / 1M tokens$75.00$2.50
Output Price / 1M tokens$150.00$12.50
Context Window
128K
200K
Max Output Tokens
8,192
8,192
Arena ELO
1,290
1,285
Coding ELO
1,295
1,280
TTFT (ms)
150
200
Tokens/sec
100
90
MultimodalYesNo
JSON ModeYesYes
Function CallingYesYes
VisionYesNo
When to Use GPT-4.5

GPT-4.5 excels at multimodal, vision, general-purpose tasks.

Strengths:

  • Latest OpenAI model
  • Strong multimodal
  • Fast inference

Best for:

multimodalvisiongeneral-purpose
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

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