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InternLM 2.5 20B vs o3: Pricing, Benchmarks & Verdict (2026)

Pricing verified Apr 8, 2026

⚡ Quick Answer

Compare InternLM 2.5 20B and o3 across pricing, benchmarks, and capabilities.

Updated: April 8, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureInternLM 2.5 20Bo3
ProviderShanghai AI LabOpenAI
Input Price / 1M tokens$0.180$10.00
Output Price / 1M tokens$0.180$40.00
Context Window
32K
200K
Max Output Tokens
4,096
100,000
Arena ELO
1,155
1,340
Coding ELO
1,150
1,320
TTFT (ms)
150
600
Tokens/sec
100
15
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 o3

o3 excels at reasoning, coding, math tasks.

Strengths:

  • Highest reasoning capability
  • Best math performance
  • Code execution

Best for:

reasoningcodingmath

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