Model Comparison

DeepSeek-V3 vs GPT-5 Medium

GPT-5 Medium significantly outperforms across most benchmarks. DeepSeek-V3 is 7.2x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

DeepSeek-V3 outperforms in 0 benchmarks, while GPT-5 Medium is better at 1 benchmark (GPQA).

GPT-5 Medium significantly outperforms across most benchmarks.

Wed Apr 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

DeepSeek-V3 costs less

For input processing, DeepSeek-V3 ($0.27/1M tokens) is 4.6x cheaper than GPT-5 Medium ($1.25/1M tokens).

For output processing, DeepSeek-V3 ($1.10/1M tokens) is 9.1x cheaper than GPT-5 Medium ($10.00/1M tokens).

In conclusion, GPT-5 Medium is more expensive than DeepSeek-V3.*

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

Lowest available price from all providers
Wed Apr 15 2026 • llm-stats.com
DeepSeek
DeepSeek-V3
Input tokens$0.27
Output tokens$1.10
Best providerDeepSeek
OpenAI
GPT-5 Medium
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5 Medium accepts 400,000 input tokens compared to DeepSeek-V3's 131,072 tokens. DeepSeek-V3 can generate longer responses up to 131,072 tokens, while GPT-5 Medium is limited to 128,000 tokens.

DeepSeek
DeepSeek-V3
Input131,072 tokens
Output131,072 tokens
OpenAI
GPT-5 Medium
Input400,000 tokens
Output128,000 tokens
Wed Apr 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5 Medium supports multimodal inputs, whereas DeepSeek-V3 does not.

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

DeepSeek-V3

Text
Images
Audio
Video

GPT-5 Medium

Text
Images
Audio
Video

License

Usage and distribution terms

DeepSeek-V3 is licensed under MIT + Model License (Commercial use allowed), while GPT-5 Medium uses a proprietary license.

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

DeepSeek-V3

MIT + Model License (Commercial use allowed)

Open weights

GPT-5 Medium

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-V3 was released on 2024-12-25, while GPT-5 Medium was released on 2025-08-07.

GPT-5 Medium is 8 months newer than DeepSeek-V3.

DeepSeek-V3

Dec 25, 2024

1.3 years ago

GPT-5 Medium

Aug 7, 2025

8 months ago

7mo newer

Knowledge Cutoff

When training data ends

GPT-5 Medium has a documented knowledge cutoff of 2024-09-30, while DeepSeek-V3's cutoff date is not specified.

We can confirm GPT-5 Medium's training data extends to 2024-09-30, but cannot make a direct comparison without DeepSeek-V3's cutoff date.

DeepSeek-V3

—

GPT-5 Medium

Sep 2024

Provider Availability

DeepSeek-V3 is available from DeepSeek. GPT-5 Medium is available from OpenAI.

DeepSeek-V3

deepseek logo
DeepSeek
Input Price:Input: $0.27/1MOutput Price:Output: $1.10/1M

GPT-5 Medium

openai logo
OpenAI
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

DeepSeek
Less expensive input tokens
Less expensive output tokens
Has open weights
OpenAI
Larger context window (400,000 tokens)
Supports multimodal inputs
Higher GPQA score (88.1% vs 59.1%)

Detailed Comparison

AI Model Comparison Table
Feature
DeepSeek
DeepSeek-V3
OpenAI
GPT-5 Medium

FAQ

Common questions about DeepSeek-V3 vs GPT-5 Medium

GPT-5 Medium significantly outperforms across most benchmarks. DeepSeek-V3 is made by DeepSeek and GPT-5 Medium is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
DeepSeek-V3 scores DROP: 91.6%, CLUEWSC: 90.9%, MATH-500: 90.2%, MMLU-Redux: 89.1%, MMLU: 88.5%. GPT-5 Medium scores AIME 2025: 88.9%, GPQA: 88.1%.
DeepSeek-V3 is 4.6x cheaper for input tokens. DeepSeek-V3 costs $0.27/M input and $1.10/M output via deepseek. GPT-5 Medium costs $1.25/M input and $10.00/M output via openai.
DeepSeek-V3 supports 131K tokens and GPT-5 Medium supports 400K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (131K vs 400K), input pricing ($0.27 vs $1.25/M), multimodal support (no vs yes), licensing (MIT + Model License (Commercial use allowed) vs Proprietary). See the full comparison above for benchmark-by-benchmark results.
DeepSeek-V3 is developed by DeepSeek and GPT-5 Medium is developed by OpenAI.