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GPT-4 1.5-mini vs InternLM 2.5 20B: Pricing, Benchmarks & Verdict (2026)

Pricing verified Apr 8, 2026

⚡ Quick Answer

Compare GPT-4 1.5-mini and InternLM 2.5 20B across pricing, benchmarks, and capabilities.

Updated: April 8, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGPT-4 1.5-miniInternLM 2.5 20B
ProviderOpenAIShanghai AI Lab
Input Price / 1M tokens$0.150$0.180
Output Price / 1M tokens$0.600$0.180
Context Window
128K
32K
Max Output Tokens
4,096
4,096
Arena ELO
1,180
1,155
Coding ELO
1,200
1,150
TTFT (ms)
140
150
Tokens/sec
120
100
MultimodalNoNo
JSON ModeYesYes
Function CallingYesYes
VisionNoNo
When to Use GPT-4 1.5-mini

GPT-4 1.5-mini excels at cost-effective, general-purpose tasks.

Strengths:

  • Affordable
  • Fast
  • Large context

Best for:

cost-effectivegeneral-purpose
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

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