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

Pricing verified Apr 8, 2026

⚡ Quick Answer

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

Updated: April 8, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGPT-4.5Grok 3-mini
ProviderOpenAIxAI
Input Price / 1M tokens$75.00$0.200
Output Price / 1M tokens$150.00$0.800
Context Window
128K
128K
Max Output Tokens
8,192
4,096
Arena ELO
1,290
1,175
Coding ELO
1,295
1,190
TTFT (ms)
150
130
Tokens/sec
100
140
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-mini

Grok 3-mini excels at cost-effective, general-purpose tasks.

Strengths:

  • Very cheap
  • Fast
  • Large context

Best for:

cost-effectivegeneral-purpose

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