LLMversus

Gemini 1.5 Flash vs o3-mini: Pricing, Benchmarks & Verdict (2026)

Pricing verified Aug 10, 2026By LLMversusUpdated August 11, 2026View methodology

⚡ Quick Answer

Compare Gemini 1.5 Flash and o3-mini across pricing, benchmarks, and capabilities.

Updated: August 10, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGemini 1.5 Flasho3-mini
ProviderGoogleOpenAI
Input Price / 1M tokens$0.075$1.10
Output Price / 1M tokens$0.300$4.40
Context Window
1M
128K
Max Output Tokens
8,192
65,536
Arena ELO
1,190
1,348
Coding ELON/A1,348
TTFT (ms)
150
350
Tokens/sec
100
25
MultimodalYesNo
JSON ModeYesYes
Function CallingYesNo
VisionNoNo
When to Use Gemini 1.5 Flash

Gemini 1.5 Flash excels at multimodal, fast-inference, cost-effective tasks.

Strengths:

  • Super cheap
  • 1M context window
  • Fast multimodal processing

Best for:

multimodalfast-inferencecost-effective
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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