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GPT-3.5 Turbo vs Claude Sonnet 5

Claude Sonnet 5 leads on 2 of 2 shared benchmarks. GPT-3.5 Turbo is 5.3× cheaper per token on a blended 3:1 basis. Claude Sonnet 5 accepts the larger context window (1M).

Head to head
Blended price uses a 3:1 input:output mix
GPT-3.5 TurboClaude Sonnet 5
ProviderOpenAIAnthropic
Input $/1M$0.500$2.00
Output $/1M$1.50$10.00
Blended $/1M$0.750$4.00
Context window16K1M
Max output4K128K
ReleasedMay 2023Jun 2026
LicenceProprietaryProprietary
GPQA Diamond 27.2% 90.5%
OTIS Mock AIME 2.2% 94.7%
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose GPT-3.5 Turbo if…
  • Costs less per token — $0.750 vs $4.00 blended
Choose Claude Sonnet 5 if…
  • Higher GPQA Diamond (90.5% vs 27.2%)
  • Higher OTIS Mock AIME (94.7% vs 2.2%)
  • Larger context window (1M)
  • Newer model (released Jun 2026)
FAQ
Which is better, GPT-3.5 Turbo or Claude Sonnet 5?
Across the 2 benchmarks both models have independently-run scores for, GPT-3.5 Turbo leads on 0 and Claude Sonnet 5 leads on 2. Benchmarks are one input — price and context window are on this page too.
Is GPT-3.5 Turbo cheaper than Claude Sonnet 5?
GPT-3.5 Turbo is cheaper: $0.750 versus $4.00 per million tokens blended at 3:1 input:output. Input alone: $0.500 vs $2.00. Output alone: $1.50 vs $10.00.
What context windows do GPT-3.5 Turbo and Claude Sonnet 5 have?
GPT-3.5 Turbo: 16,385 tokens. Claude Sonnet 5: 1,000,000 tokens.
Who makes GPT-3.5 Turbo and Claude Sonnet 5?
GPT-3.5 Turbo is made by OpenAI. Claude Sonnet 5 is made by Anthropic.
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