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InternLM 2.5 20B vs Phi-3.5 Mini: Pricing, Benchmarks & Verdict (2026)

Pricing verified Apr 8, 2026

⚡ Quick Answer

Compare InternLM 2.5 20B and Phi-3.5 Mini across pricing, benchmarks, and capabilities.

Updated: April 8, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureInternLM 2.5 20BPhi-3.5 Mini
ProviderShanghai AI LabMicrosoft
Input Price / 1M tokens$0.180$0.130
Output Price / 1M tokens$0.180$0.520
Context Window
32K
128K
Max Output Tokens
4,096
4,096
Arena ELO
1,155
1,160
Coding ELO
1,150
1,165
TTFT (ms)
150
150
Tokens/sec
100
100
MultimodalNoNo
JSON ModeYesYes
Function CallingYesYes
VisionNoNo
When to Use InternLM 2.5 20B

InternLM 2.5 20B excels at cost-effective, general-purpose tasks.

Strengths:

  • Very affordable
  • Good instruction following
  • Fast

Best for:

cost-effectivegeneral-purpose
When to Use Phi-3.5 Mini

Phi-3.5 Mini excels at cost-effective, fast-inference tasks.

Strengths:

  • Very cheap
  • Fast
  • Large context

Best for:

cost-effectivefast-inference

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