DeepSeek-R1 vs Gemini 1.5 Flash
Comparing DeepSeek-R1 and Gemini 1.5 Flash across benchmarks, pricing, and capabilities.
DeepSeek · Google · Updated for 2026
Which is better?
DeepSeek-R1 and Gemini 1.5 Flash trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Gemini 1.5 Flash is roughly 3.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 1.5 Flash also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose DeepSeek-R1
- you want the most recent training data — it shipped Jan 2025
- you need open weights you can self-host or fine-tune
Choose Gemini 1.5 Flash
- cost matters — it's about 3.7x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
At a glance
The differences that matter most.
Individual benchmarks
0 reported for DeepSeek-R1 · 22 for Gemini 1.5 Flash
DeepSeek-R1 and Gemini 1.5 Flashdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-R1 ($0.55/1M tokens) is 3.7x more expensive than Gemini 1.5 Flash ($0.15/1M tokens).
For output processing, DeepSeek-R1 ($2.19/1M tokens) is 3.6x more expensive than Gemini 1.5 Flash ($0.60/1M tokens).
In conclusion, DeepSeek-R1 is more expensive than Gemini 1.5 Flash.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 1.5 Flash accepts 1,048,576 input tokens compared to DeepSeek-R1's 131,072 tokens. DeepSeek-R1 can generate longer responses up to 131,072 tokens, while Gemini 1.5 Flash is limited to 8,192 tokens.
Input capabilities
Documented input modalities across available providers
Gemini 1.5 Flash supports multimodal inputs, whereas DeepSeek-R1 does not.
Gemini 1.5 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.
DeepSeek-R1
Gemini 1.5 Flash
License
Usage and distribution terms
DeepSeek-R1 is licensed under MIT, while Gemini 1.5 Flash uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
MIT
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
DeepSeek-R1 was released on 2025-01-20, while Gemini 1.5 Flash was released on 2024-05-01.
DeepSeek-R1 is 9 months newer than Gemini 1.5 Flash.
Jan 20, 2025
1.6 years ago
8mo newerMay 1, 2024
2.3 years ago
Knowledge Cutoff
When training data ends
Gemini 1.5 Flash has a documented knowledge cutoff of 2023-11-01, while DeepSeek-R1's cutoff date is not specified.
We can confirm Gemini 1.5 Flash's training data extends to 2023-11-01, but cannot make a direct comparison without DeepSeek-R1's cutoff date.
—
Nov 2023
Provider Availability
DeepSeek-R1 is available from DeepSeek, DeepInfra, Together, Fireworks. Gemini 1.5 Flash is available from Google.
DeepSeek-R1
Gemini 1.5 Flash
Outputs Comparison
Judge for yourself.
Run your own prompts against DeepSeek-R1 and Gemini 1.5 Flash side-by-side, then vote on the output you prefer.
FAQ
Common questions about DeepSeek-R1 vs Gemini 1.5 Flash.