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Gemini 2.5 Pro vs o3-mini: Pricing, Benchmarks & Verdict (2026)

Verdict

o3-mini is significantly cheaper at $1.10/$4.40 per million tokens vs $1.25/$10.00. Gemini 2.5 Pro ranks higher overall with an Arena ELO of 1340 vs 1310. Gemini 2.5 Pro offers a larger 1049K context window vs 200K.

Side-by-Side Comparison

FeatureGemini 2.5 Proo3-mini
ProviderGoogleOpenAI
Input Price / 1M tokens$1.25$1.10
Output Price / 1M tokens$10.00$4.40
Context Window1.048576M200K
Max Output Tokens65,536100,000
Arena ELO1,3401,310
Coding ELO1,3501,340
TTFT (ms)4001,500
Tokens/sec7055
MultimodalYesNo
JSON ModeYesYes
Function CallingYesYes
VisionYesNo
When to Use Gemini 2.5 Pro

Choose Gemini 2.5 Pro when you need: 1m token context window, excellent reasoning capabilities, strong coding performance, native multimodal support. It excels at coding, reasoning, long-context, multimodal tasks. Its 1049K context window is larger, making it better for long-document processing.

Strengths:

  • 1M token context window
  • Excellent reasoning capabilities
  • Strong coding performance
  • Native multimodal support

Best for:

codingreasoninglong-contextmultimodal
When to Use o3-mini

Choose o3-mini when you need: strong mathematical reasoning, good coding performance, affordable reasoning model, large output window. It excels at reasoning, math, coding, science tasks. It is also the more cost-effective option between the two.

Strengths:

  • Strong mathematical reasoning
  • Good coding performance
  • Affordable reasoning model
  • Large output window

Best for:

reasoningmathcodingscience

Frequently Asked Questions

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