DeepSeek-V3.1 vs GPT-5.1 Instant Comparison
Comparing DeepSeek-V3.1 and GPT-5.1 Instant across benchmarks, pricing, and capabilities.
Performance Benchmarks
Comparative analysis across standard metrics
DeepSeek-V3.1 outperforms in 0 benchmarks, while GPT-5.1 Instant is better at 3 benchmarks (AIME 2025, GPQA, SWE-Bench Verified).
GPT-5.1 Instant significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V3.1 ($0.27/1M tokens) is 4.6x cheaper than GPT-5.1 Instant ($1.25/1M tokens).
For output processing, DeepSeek-V3.1 ($1.00/1M tokens) is 10.0x cheaper than GPT-5.1 Instant ($10.00/1M tokens).
In conclusion, GPT-5.1 Instant is more expensive than DeepSeek-V3.1.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.1 Instant 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 Instant is limited to 128,000 tokens.
Input Capabilities
Supported data types and modalities
GPT-5.1 Instant supports multimodal inputs, whereas DeepSeek-V3.1 does not.
GPT-5.1 Instant can handle both text and other forms of data like images, making it suitable for multimodal applications.
DeepSeek-V3.1
GPT-5.1 Instant
License
Usage and distribution terms
DeepSeek-V3.1 is licensed under MIT, while GPT-5.1 Instant 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-V3.1 was released on 2025-01-10, while GPT-5.1 Instant was released on 2025-11-12.
GPT-5.1 Instant is 10 months newer than DeepSeek-V3.1.
Jan 10, 2025
1.2 years ago
Nov 12, 2025
4 months ago
10mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
DeepSeek-V3.1 is available from DeepInfra, Novita. GPT-5.1 Instant is available from OpenAI. The availability of providers can affect quality of the model and reliability.
DeepSeek-V3.1
GPT-5.1 Instant
Outputs Comparison
Key Takeaways
DeepSeek-V3.1
View detailsDeepSeek
Detailed Comparison
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