LLMversus

o3 vs Phi-4: Pricing, Benchmarks & Verdict (2026)

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

⚡ Quick Answer

Compare o3 and Phi-4 across pricing, benchmarks, and capabilities.

Updated: August 10, 2026 · ✓ Pricing verified

Side-by-Side Comparison

Featureo3Phi-4
ProviderOpenAIMicrosoft
Input Price / 1M tokens$2.00$0.070
Output Price / 1M tokens$8.00$0.140
Context Window
200K
16.384K
Max Output Tokens
100,000
4,096
Arena ELO
1,340
1,150
Coding ELO
1,320
1,130
TTFT (ms)
600
100
Tokens/sec
15
160
MultimodalNoNo
JSON ModeYesYes
Function CallingYesNo
VisionNoNo
When to Use o3

o3 excels at reasoning, coding, math tasks.

Strengths:

  • Highest reasoning capability
  • Best math performance
  • Code execution

Best for:

reasoningcodingmath
When to Use Phi-4

Phi-4 excels at cost-sensitive, edge-deployment, math, lightweight-tasks tasks.

Strengths:

  • Ultra-low cost for a capable model
  • Strong math for its size (14B params)
  • Very fast inference
  • Can run on consumer hardware

Best for:

cost-sensitiveedge-deploymentmathlightweight-tasks

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