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Claude Opus 4 vs InternLM 2.5 20B: Pricing, Benchmarks & Verdict (2026)

Pricing verified Apr 8, 2026

⚡ Quick Answer

Compare Claude Opus 4 and InternLM 2.5 20B across pricing, benchmarks, and capabilities.

Updated: April 8, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureClaude Opus 4InternLM 2.5 20B
ProviderAnthropicShanghai AI Lab
Input Price / 1M tokens$5.00$0.180
Output Price / 1M tokens$25.00$0.180
Context Window
200K
32K
Max Output Tokens
32,000
4,096
Arena ELO
1,504
1,155
Coding ELO
1,504
1,150
TTFT (ms)
500
150
Tokens/sec
50
100
MultimodalYesNo
JSON ModeYesYes
Function CallingYesYes
VisionYesNo
When to Use Claude Opus 4

Claude Opus 4 excels at coding, analysis, agents, complex-reasoning tasks.

Strengths:

  • Top-tier coding and reasoning
  • Excellent agentic capabilities
  • Strong instruction following
  • 200K context window

Best for:

codinganalysisagentscomplex-reasoning
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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