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Gemini 2.5 Flash vs GPT-3.5 Turbo
Comprehensive side-by-side LLM comparison
Gemini 2.5 Flash leads with 65.8% higher average benchmark score. Gemini 2.5 Flash offers 1.1M more tokens in context window than GPT-3.5 Turbo. GPT-3.5 Turbo is $0.80 cheaper per million tokens. Gemini 2.5 Flash supports multimodal inputs. Overall, Gemini 2.5 Flash is the stronger choice for coding tasks.
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Gemini 2.5 Flash represents a continued evolution of Google's efficient multimodal models, designed to deliver enhanced capabilities while maintaining the performance characteristics valued in the Flash series. Built to serve high-throughput applications with improved quality, it advances the balance between speed and intelligence.
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OpenAI
GPT-3.5 Turbo was developed as an optimized version of GPT-3.5, designed to provide a balance of capability and efficiency for conversational and completion tasks. Built to serve as a cost-effective option for applications requiring reliable language understanding and generation, it became widely adopted for chatbots, content generation, and general-purpose AI assistance.
2 years newer
GPT-3.5 Turbo
OpenAI
2023-03-21
Gemini 2.5 Flash
2025-05-20
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Pricing Comparison
Cost per million tokens (USD)
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Gemini 2.5 Flash
Input:$0.30
Output:$2.50
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GPT-3.5 Turbo
Input:$0.50
Output:$1.50($0.80 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Gemini 2.5 Flash
Average Score:81.3%(+65.8%)
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GPT-3.5 Turbo
Average Score:15.4%
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Knowledge Cutoff
Training data recency comparison
GPT-3.5 Turbo
2021-09-30
Gemini 2.5 Flash
2025-01-31
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Gemini 2.5 Flash
2 providers
Throughput: 85 tok/s
Latency: 0.7ms
ZeroEval
Throughput: 85 tok/s
Latency: 0.7ms
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Gemini 2.5 Flash
Avg Score:81.3%(+65.8%)
Providers:2
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GPT-3.5 Turbo
Avg Score:15.4%
Providers:2