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Gemini 2.5 Pro vs GPT-4o Mini: Pricing, Benchmarks & Verdict (2026)

Verdict

GPT-4o Mini is significantly cheaper at $0.15/$0.60 per million tokens vs $1.25/$10.00. Gemini 2.5 Pro is stronger for coding with a coding ELO of 1350 vs 1200. GPT-4o Mini is faster at 120 tokens/sec vs 70 tokens/sec. Gemini 2.5 Pro ranks higher overall with an Arena ELO of 1340 vs 1220. Gemini 2.5 Pro offers a larger 1049K context window vs 128K.

Side-by-Side Comparison

FeatureGemini 2.5 ProGPT-4o Mini
ProviderGoogleOpenAI
Input Price / 1M tokens$1.25$0.150
Output Price / 1M tokens$10.00$0.600
Context Window1.048576M128K
Max Output Tokens65,53616,384
Arena ELO1,3401,220
Coding ELO1,3501,200
TTFT (ms)400180
Tokens/sec70120
MultimodalYesYes
JSON ModeYesYes
Function CallingYesYes
VisionYesYes
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 GPT-4o Mini

Choose GPT-4o Mini when you need: extremely affordable pricing, fast response times, strong for its price tier, good multimodal support. It excels at chatbots, lightweight-tasks, cost-sensitive tasks. It is also the more cost-effective option between the two.

Strengths:

  • Extremely affordable pricing
  • Fast response times
  • Strong for its price tier
  • Good multimodal support

Best for:

chatbotslightweight-taskscost-sensitive

Frequently Asked Questions

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