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GPT-3.5 Turbo vs GPT-5 Codex
Comprehensive side-by-side LLM comparison
GPT-3.5 Turbo leads with 29.3% higher average benchmark score. GPT-3.5 Turbo is available on 2 providers. Overall, GPT-3.5 Turbo is the stronger choice for coding tasks.
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OpenAI
GPT-3.5 Turbo is a language model developed by OpenAI. The model shows competitive results across 8 benchmarks. Notable strengths include DROP (70.2%), MMLU (69.8%), HumanEval (68.0%). The model is available through 2 API providers.
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OpenAI
GPT-5 Codex is a language model developed by OpenAI. It achieves strong performance with an average score of 74.5% across 1 benchmarks. Notable strengths include SWE-Bench Verified (74.5%). Released in 2025, it represents OpenAI's latest advancement in AI technology.
2 years newer
GPT-3.5 Turbo
OpenAI
2023-03-21
GPT-5 Codex
OpenAI
2025-09-15
Performance Metrics
Context window and performance specifications
Average performance across 9 common benchmarks
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GPT-3.5 Turbo
Average Score:37.6%(+29.3%)
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GPT-5 Codex
Average Score:8.3%
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Knowledge Cutoff
Training data recency comparison
GPT-3.5 Turbo
2021-09-30
GPT-5 Codex
2024-09-30
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-3.5 Turbo
2 providers
Azure
Throughput: 90 tok/s
Latency: 0.8ms
OpenAI
Throughput: 100 tok/s
Latency: 0.5ms
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GPT-3.5 Turbo
Avg Score:37.6%(+29.3%)
Providers:2
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GPT-5 Codex
Avg Score:8.3%
Providers:0