Model Comparison

DeepSeek-V2.5 vs GPT-5 miniWhich is better in 2026?

Comparing DeepSeek-V2.5 and GPT-5 mini across benchmarks, pricing, and capabilities.

Verdict: DeepSeek-V2.5 vs GPT-5 mini — which is better?

DeepSeek-V2.5 (by DeepSeek) and GPT-5 mini (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

On price, DeepSeek-V2.5 is roughly 3.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5 mini also accepts a larger context window (400,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose DeepSeek-V2.5 if…

  • cost matters — it's about 3.9x cheaper per token
  • you need open weights you can self-host or fine-tune

Choose GPT-5 mini if…

  • you process long inputs — it offers a 400,000 token context window
  • you want the most recent training data — it shipped Aug 2025
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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

DeepSeek-V2.5 and GPT-5 mini don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

DeepSeek-V2.5 costs less

For input processing, DeepSeek-V2.5 ($0.14/1M tokens) is 1.8x cheaper than GPT-5 mini ($0.25/1M tokens).

For output processing, DeepSeek-V2.5 ($0.28/1M tokens) is 7.1x cheaper than GPT-5 mini ($2.00/1M tokens).

In conclusion, GPT-5 mini is more expensive than DeepSeek-V2.5.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sun Jun 07 2026 • llm-stats.com
DeepSeek
DeepSeek-V2.5
Input tokens$0.14
Output tokens$0.28
Best providerDeepSeek
OpenAI
GPT-5 mini
Input tokens$0.25
Output tokens$2.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5 mini accepts 400,000 input tokens compared to DeepSeek-V2.5's 8,192 tokens. GPT-5 mini can generate longer responses up to 128,000 tokens, while DeepSeek-V2.5 is limited to 8,192 tokens.

DeepSeek
DeepSeek-V2.5
Input8,192 tokens
Output8,192 tokens
OpenAI
GPT-5 mini
Input400,000 tokens
Output128,000 tokens
Sun Jun 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5 mini supports multimodal inputs, whereas DeepSeek-V2.5 does not.

GPT-5 mini can handle both text and other forms of data like images, making it suitable for multimodal applications.

DeepSeek-V2.5

Text
Images
Audio
Video

GPT-5 mini

Text
Images
Audio
Video

License

Usage and distribution terms

DeepSeek-V2.5 is licensed under deepseek, while GPT-5 mini uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

DeepSeek-V2.5

deepseek

Open weights

GPT-5 mini

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-V2.5 was released on 2024-05-08, while GPT-5 mini was released on 2025-08-07.

GPT-5 mini is 15 months newer than DeepSeek-V2.5.

DeepSeek-V2.5

May 8, 2024

2.1 years ago

GPT-5 mini

Aug 7, 2025

10 months ago

1.2yr newer

Knowledge Cutoff

When training data ends

GPT-5 mini has a documented knowledge cutoff of 2024-05-30, while DeepSeek-V2.5's cutoff date is not specified.

We can confirm GPT-5 mini's training data extends to 2024-05-30, but cannot make a direct comparison without DeepSeek-V2.5's cutoff date.

DeepSeek-V2.5

—

GPT-5 mini

May 2024

Provider Availability

DeepSeek-V2.5 is available from DeepSeek, DeepInfra, Hyperbolic. GPT-5 mini is available from OpenAI.

DeepSeek-V2.5

deepseek logo
DeepSeek
Input Price:Input: $0.14/1MOutput Price:Output: $0.28/1M
deepinfra logo
Deepinfra
Input Price:Input: $0.70/1MOutput Price:Output: $1.40/1M
hyperbolic logo
Hyperbolic
Input Price:Input: $2.00/1MOutput Price:Output: $2.00/1M

GPT-5 mini

openai logo
OpenAI
Input Price:Input: $0.25/1MOutput Price:Output: $2.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

DeepSeek
Less expensive input tokens
Less expensive output tokens
Has open weights
OpenAI
Larger context window (400,000 tokens)
Supports multimodal inputs

Detailed Comparison

AI Model Comparison Table
Feature
DeepSeek
DeepSeek-V2.5
OpenAI
GPT-5 mini

FAQ

Common questions about DeepSeek-V2.5 vs GPT-5 mini.

Which is better, DeepSeek-V2.5 or GPT-5 mini?

DeepSeek-V2.5 (DeepSeek) and GPT-5 mini (OpenAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does DeepSeek-V2.5 compare to GPT-5 mini in benchmarks?

DeepSeek-V2.5 scores GSM8k: 95.1%, MT-Bench: 90.2%, HumanEval: 89.0%, BBH: 84.3%, AlignBench: 80.4%. GPT-5 mini scores AIME 2025: 91.1%, HMMT 2025: 87.8%, GPQA: 82.3%, FrontierMath: 22.1%, Humanity's Last Exam: 16.7%.

Is DeepSeek-V2.5 cheaper than GPT-5 mini?

DeepSeek-V2.5 is 1.8x cheaper for input tokens. DeepSeek-V2.5 costs $0.14/M input and $0.28/M output via deepseek. GPT-5 mini costs $0.25/M input and $2.00/M output via openai.

What are the context window sizes for DeepSeek-V2.5 and GPT-5 mini?

DeepSeek-V2.5 supports 8K tokens and GPT-5 mini supports 400K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between DeepSeek-V2.5 and GPT-5 mini?

Key differences include context window (8K vs 400K), input pricing ($0.14 vs $0.25/M), multimodal support (no vs yes), licensing (deepseek vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V2.5 and GPT-5 mini?

DeepSeek-V2.5 is developed by DeepSeek and GPT-5 mini is developed by OpenAI.

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