LLMversus

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

Pricing verified Sep 14, 2026By LLMversusUpdated September 17, 2026View methodology

⚡ Quick Answer

Compare GPT-3.5 Turbo and InternLM 2.5 20B across pricing, benchmarks, and capabilities.

Updated: September 14, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGPT-3.5 TurboInternLM 2.5 20B
ProviderOpenAIShanghai AI Lab
Input Price / 1M tokens$0.500$0.180
Output Price / 1M tokens$1.50$0.180
Context Window
16K
32K
Max Output Tokens
4,096
4,096
Arena ELO
1,120
1,155
Coding ELO
1,100
1,150
TTFT (ms)
150
150
Tokens/sec
100
100
MultimodalNoNo
JSON ModeYesYes
Function CallingYesYes
VisionNoNo
When to Use GPT-3.5 Turbo

GPT-3.5 Turbo excels at cost-effective, general-purpose tasks.

Strengths:

  • Very cheap
  • Fast
  • Widely used

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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