DeepSeek-V3.1 vs GPT-5.1 High Comparison

Comparing DeepSeek-V3.1 and GPT-5.1 High across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

DeepSeek-V3.1 outperforms in 0 benchmarks, while GPT-5.1 High is better at 2 benchmarks (AIME 2025, GPQA).

GPT-5.1 High significantly outperforms across most benchmarks.

Sat Mar 14 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

DeepSeek-V3.1 costs less

For input processing, DeepSeek-V3.1 ($0.27/1M tokens) is 4.6x cheaper than GPT-5.1 High ($1.25/1M tokens).

For output processing, DeepSeek-V3.1 ($1.00/1M tokens) is 10.0x cheaper than GPT-5.1 High ($10.00/1M tokens).

In conclusion, GPT-5.1 High is more expensive than DeepSeek-V3.1.*

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

Lowest available price from all providers

Sat Mar 14 2026 • llm-stats.com

DeepSeek-V3.1

Input tokens$0.27

Output tokens$1.00

Best providerDeepinfra

GPT-5.1 High

Input tokens$1.25

Output tokens$10.00

Best providerOpenAI

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Context Window

Maximum input and output token capacity

GPT-5.1 High accepts 400,000 input tokens compared to DeepSeek-V3.1's 163,840 tokens. DeepSeek-V3.1 can generate longer responses up to 163,840 tokens, while GPT-5.1 High is limited to 128,000 tokens.

DeepSeek-V3.1

Input163,840 tokens

Output163,840 tokens

GPT-5.1 High

Input400,000 tokens

Output128,000 tokens

Sat Mar 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.1 High supports multimodal inputs, whereas DeepSeek-V3.1 does not.

GPT-5.1 High can handle both text and other forms of data like images, making it suitable for multimodal applications.

DeepSeek-V3.1

Text

Images

Audio

Video

GPT-5.1 High

Text

Images

Audio

Video

License

Usage and distribution terms

DeepSeek-V3.1 is licensed under MIT, while GPT-5.1 High uses a proprietary license.

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

DeepSeek-V3.1

MIT

Open weights

GPT-5.1 High

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-V3.1 was released on 2025-01-10, while GPT-5.1 High was released on 2025-11-12.

GPT-5.1 High is 10 months newer than DeepSeek-V3.1.

DeepSeek-V3.1

Jan 10, 2025

1.2 years ago

GPT-5.1 High

Nov 12, 2025

4 months ago

10mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

DeepSeek-V3.1 is available from DeepInfra, Novita. GPT-5.1 High is available from OpenAI. The availability of providers can affect quality of the model and reliability.