LLMversus

Gemini 2.0 Flash Thinking vs GPT-4 1.5-nano: Pricing, Benchmarks & Verdict (2026)

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

⚡ Quick Answer

Compare Gemini 2.0 Flash Thinking and GPT-4 1.5-nano across pricing, benchmarks, and capabilities.

Updated: September 14, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGemini 2.0 Flash ThinkingGPT-4 1.5-nano
ProviderGoogleOpenAI
Input Price / 1M tokens$0.00$0.100
Output Price / 1M tokens$0.00$0.400
Context Window
32K
128K
Max Output Tokens
16,384
4,096
Arena ELO
1,280
1,150
Coding ELO
1,270
1,160
TTFT (ms)
150
120
Tokens/sec
100
150
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 GPT-4 1.5-nano

GPT-4 1.5-nano excels at cost-effective, fast-inference tasks.

Strengths:

  • Super cheap
  • Very fast
  • Large context

Best for:

cost-effectivefast-inference

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