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GPT-4.5 vs o3-mini: Pricing, Benchmarks & Verdict (2026)

Pricing verified Apr 8, 2026

⚡ Quick Answer

Compare GPT-4.5 and o3-mini across pricing, benchmarks, and capabilities.

Updated: April 8, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGPT-4.5o3-mini
ProviderOpenAIOpenAI
Input Price / 1M tokens$75.00$1.10
Output Price / 1M tokens$150.00$4.40
Context Window
128K
128K
Max Output Tokens
8,192
65,536
Arena ELO
1,290
1,280
Coding ELO
1,295
1,285
TTFT (ms)
150
350
Tokens/sec
100
25
MultimodalYesNo
JSON ModeYesYes
Function CallingYesNo
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 o3-mini

o3-mini excels at reasoning, math, general-purpose tasks.

Strengths:

  • Strong reasoning
  • Good math skills
  • Affordable reasoning

Best for:

reasoningmathgeneral-purpose

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