LLMversus

GPT-4 1.5-nano vs o3: Pricing, Benchmarks & Verdict (2026)

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

⚡ Quick Answer

Compare GPT-4 1.5-nano and o3 across pricing, benchmarks, and capabilities.

Updated: September 14, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGPT-4 1.5-nanoo3
ProviderOpenAIOpenAI
Input Price / 1M tokens$0.100$2.00
Output Price / 1M tokens$0.400$8.00
Context Window
128K
200K
Max Output Tokens
4,096
100,000
Arena ELO
1,150
1,340
Coding ELO
1,160
1,320
TTFT (ms)
120
600
Tokens/sec
150
15
MultimodalNoNo
JSON ModeYesYes
Function CallingYesYes
VisionNoNo
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
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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