LLMversus

Gemini 2.5 Pro vs GPT-4 1.5-mini: Pricing, Benchmarks & Verdict (2026)

Pricing verified Apr 20, 2026By LLMversusUpdated June 14, 2026View methodology

⚡ Quick Answer

GPT-4.1 Mini is significantly cheaper at $0.40/$1.60 per million tokens vs $1.25/$10.00. Gemini 2.5 Pro is stronger for coding with a coding ELO of 1350 vs 1230. GPT-4.1 Mini is faster at 115 tokens/sec vs 70 tokens/sec. Gemini 2.5 Pro ranks higher overall with an Arena ELO of 1340 vs 1240.

Updated: April 20, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGemini 2.5 ProGPT-4 1.5-mini
ProviderGoogleOpenAI
Input Price / 1M tokens$1.25$0.400
Output Price / 1M tokens$10.00$1.60
Context Window
1.048576M
128K
Max Output Tokens
65,536
4,096
Arena ELO
1,430
1,180
Coding ELO
1,430
1,200
TTFT (ms)
400
140
Tokens/sec
70
120
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 GPT-4 1.5-mini

Choose GPT-4.1 Mini when you need: 1m token context window at low cost, great balance of speed and quality, strong coding for a mini model, affordable for high-volume use. It excels at chatbots, long-context, cost-sensitive tasks. It is also the more cost-effective option between the two.

Strengths:

  • Affordable
  • Fast
  • Large context

Best for:

cost-effectivegeneral-purpose

Frequently Asked Questions

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