DeepSeek-V2.5 vs Gemini 1.5 Flash
DeepSeek-V2.5 and Gemini 1.5 Flash are closely matched at 8.4 and 6.1 on the LLM Stats Score. DeepSeek-V2.5 is 1.5x cheaper per token.
DeepSeek · Google · Updated for 2026
Which is better?
DeepSeek-V2.5 and Gemini 1.5 Flash are closely matched on the overall LLM Stats Score at 8.4 and 6.1.
In the 4 individual benchmarks reported for both models, DeepSeek-V2.5 wins 3; this is a narrower head-to-head signal than the composite indexes.
On price, DeepSeek-V2.5 is roughly 1.5x 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-V2.5
- you value its reported benchmark strengths — it wins 3 of 4 exact shared results
- cost matters — it's about 1.5x cheaper per token
- you want the most recent training data — it shipped May 2024
- you need open weights you can self-host or fine-tune
Choose Gemini 1.5 Flash
- you process long inputs — it offers a 1,048,576 token context window
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
15 reported for DeepSeek-V2.5 · 22 for Gemini 1.5 Flash
DeepSeek-V2.5 outperforms in 3 benchmarks (GSM8k, HumanEval, MMLU), while Gemini 1.5 Flash is better at 1 benchmark (MATH).
DeepSeek-V2.5 shows notably better performance in the majority of benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V2.5 ($0.14/1M tokens) is 1.1x cheaper than Gemini 1.5 Flash ($0.15/1M tokens).
For output processing, DeepSeek-V2.5 ($0.28/1M tokens) is 2.1x cheaper than Gemini 1.5 Flash ($0.60/1M tokens).
In conclusion, Gemini 1.5 Flash is more expensive than DeepSeek-V2.5.*
* 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-V2.5's 8,192 tokens. Both models can generate responses up to 8,192 tokens.
Input capabilities
Documented input modalities across available providers
Gemini 1.5 Flash supports multimodal inputs, whereas DeepSeek-V2.5 does not.
Gemini 1.5 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.
DeepSeek-V2.5
Gemini 1.5 Flash
License
Usage and distribution terms
DeepSeek-V2.5 is licensed under deepseek, 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.
deepseek
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
DeepSeek-V2.5 was released on 2024-05-08, while Gemini 1.5 Flash was released on 2024-05-01.
DeepSeek-V2.5 is 0 month newer than Gemini 1.5 Flash.
May 8, 2024
2.3 years ago
1w 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-V2.5'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-V2.5's cutoff date.
—
Nov 2023
Provider Availability
DeepSeek-V2.5 is available from DeepSeek, DeepInfra, Hyperbolic. Gemini 1.5 Flash is available from Google.
DeepSeek-V2.5
Gemini 1.5 Flash
Outputs Comparison
Judge for yourself.
Run your own prompts against DeepSeek-V2.5 and Gemini 1.5 Flash side-by-side, then vote on the output you prefer.
FAQ
Common questions about DeepSeek-V2.5 vs Gemini 1.5 Flash.