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Gemini 1.5 Flash vs GPT-4.5
Comprehensive side-by-side LLM comparison
GPT-4.5 leads with 5.5% higher average benchmark score. Gemini 1.5 Flash offers 924.7K more tokens in context window than GPT-4.5. Gemini 1.5 Flash is $224.25 cheaper per million tokens. Overall, GPT-4.5 is the stronger choice for coding tasks.
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Gemini 1.5 Flash is a multimodal language model developed by Google. It achieves strong performance with an average score of 66.8% across 22 benchmarks. It excels particularly in XSTest (97.0%), HellaSwag (86.5%), GSM8k (86.2%). With a 1.1M token context window, it can handle extensive documents and complex multi-turn conversations. The model is available through 1 API provider. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2024, it represents Google's latest advancement in AI technology.
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OpenAI
GPT-4.5 is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 63.1% across 27 benchmarks. It excels particularly in GSM8k (97.0%), MMLU (90.8%), CharXiv-D (90.0%). It supports a 132K token context window for handling large documents. The model is available through 1 API provider. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents OpenAI's latest advancement in AI technology.
10 months newer
Gemini 1.5 Flash
2024-05-01
GPT-4.5
OpenAI
2025-02-27
Pricing Comparison
Cost per million tokens (USD)
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Gemini 1.5 Flash
Input:$0.15
Output:$0.60($224.25 cheaper)
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GPT-4.5
Input:$75.00
Output:$150.00
Performance Metrics
Context window and performance specifications
Average performance across 43 common benchmarks
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Gemini 1.5 Flash
Average Score:34.2%
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GPT-4.5
Average Score:39.6%(+5.5%)
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Knowledge Cutoff
Training data recency comparison
Gemini 1.5 Flash
2023-11-01
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 1.5 Flash
1 providers
Throughput: 150 tok/s
Latency: 0.3ms
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GPT-4.5
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Gemini 1.5 Flash
Avg Score:34.2%
Providers:1
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GPT-4.5
Avg Score:39.6%(+5.5%)
Providers:1