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Gemini 2.5 Flash vs o1
Comprehensive side-by-side LLM comparison
o1 leads with 1.9% higher average benchmark score. Gemini 2.5 Flash offers 708.2K more tokens in context window than o1. Gemini 2.5 Flash is $74.25 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
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Google DeepMind
Gemini 2.5 Flash, released by Google in June 2025, is a large language model from the Gemini 2.5 family optimized for high-throughput, cost-efficient deployments with multimodal reasoning. It features a 1M token context window, hybrid thinking control, and native support for text, image, video, and audio input. Gemini 2.5 Flash targets latency-sensitive applications, document analysis, and high-volume API workloads that benefit from combined reasoning and generation in a single model.
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OpenAI
OpenAI o1, released by OpenAI in December 2024, is a reasoning-focused large language model that applies extended chain-of-thought processing before generating responses. It features a 200K token context window and native image understanding, demonstrating strong performance on STEM benchmarks requiring multi-step reasoning. o1 targets mathematics, science, and coding tasks where careful deliberation over the problem produces more accurate outputs than direct generation.
6 months newer
o1
OpenAI
2024-12-05
Gemini 2.5 Flash
Google DeepMind
2025-06-17
Pricing Comparison
Cost per million tokens (USD)
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Gemini 2.5 Flash
Input:$0.15
Output:$0.60($74.25 cheaper)
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o1
Input:$15.00
Output:$60.00
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Gemini 2.5 Flash
Average Score:0.8%
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o1
Average Score:2.6%(+1.9%)
Performance comparison across key benchmark categories
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Gemini 2.5 Flash
Agents2.5%
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o1
Agents6.3%(+3.8%)
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Knowledge Cutoff
Training data recency comparison
o1
2023-10
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
Google Cloud Vertex AI
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o1
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Gemini 2.5 Flash
Avg Score:0.8%
Providers:2
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o1
Avg Score:2.6%(+1.9%)
Providers:1