LLMversus

Gemini 2.0 Flash Thinking vs o3: Pricing, Benchmarks & Verdict (2026)

Pricing verified Sep 14, 2026By LLMversusUpdated September 17, 2026View methodology

⚡ Quick Answer

Compare Gemini 2.0 Flash Thinking and o3 across pricing, benchmarks, and capabilities.

Updated: September 14, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGemini 2.0 Flash Thinkingo3
ProviderGoogleOpenAI
Input Price / 1M tokens$0.00$2.00
Output Price / 1M tokens$0.00$8.00
Context Window
32K
200K
Max Output Tokens
16,384
100,000
Arena ELO
1,280
1,340
Coding ELO
1,270
1,320
TTFT (ms)
150
600
Tokens/sec
100
15
MultimodalNoNo
JSON ModeYesYes
Function CallingYesYes
VisionNoNo
When to Use Gemini 2.0 Flash Thinking

Gemini 2.0 Flash Thinking excels at reasoning, general-purpose tasks.

Strengths:

  • Free reasoning model
  • Strong math & logic
  • Extended thinking

Best for:

reasoninggeneral-purpose
When to Use o3

o3 excels at reasoning, coding, math tasks.

Strengths:

  • Highest reasoning capability
  • Best math performance
  • Code execution

Best for:

reasoningcodingmath

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