Model Comparison
DeepSeek-V3.2-Speciale vs GPT-5.1 InstantWhich is better in 2026?
Both models are evenly matched across the benchmarks. DeepSeek-V3.2-Speciale is 10.9x cheaper per token.
Verdict: DeepSeek-V3.2-Speciale vs GPT-5.1 Instant — which is better?
DeepSeek-V3.2-Speciale (by DeepSeek) and GPT-5.1 Instant (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.
DeepSeek-V3.2-Speciale outperforms in 1 benchmarks (AIME 2025), while GPT-5.1 Instant is better at 1 benchmark (SWE-Bench Verified). Both models are evenly matched across the benchmarks.
On price, DeepSeek-V3.2-Speciale is roughly 10.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.1 Instant also accepts a larger context window (400,000 input tokens), making it the stronger choice for long documents and large codebases.
Choose DeepSeek-V3.2-Speciale if…
- cost matters — it's about 10.9x cheaper per token
- you want the most recent training data — it shipped Dec 2025
- you need open weights you can self-host or fine-tune
Choose GPT-5.1 Instant if…
- you process long inputs — it offers a 400,000 token context window
Performance Benchmarks
Comparative analysis across standard metrics
DeepSeek-V3.2-Speciale outperforms in 1 benchmarks (AIME 2025), while GPT-5.1 Instant is better at 1 benchmark (SWE-Bench Verified).
Both models are evenly matched across the benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V3.2-Speciale ($0.28/1M tokens) is 4.5x cheaper than GPT-5.1 Instant ($1.25/1M tokens).
For output processing, DeepSeek-V3.2-Speciale ($0.42/1M tokens) is 23.8x cheaper than GPT-5.1 Instant ($10.00/1M tokens).
In conclusion, GPT-5.1 Instant is more expensive than DeepSeek-V3.2-Speciale.*
* 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-V3.2-Speciale's 131,072 tokens. DeepSeek-V3.2-Speciale can generate longer responses up to 131,072 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-V3.2-Speciale does not.
GPT-5.1 Instant can handle both text and other forms of data like images, making it suitable for multimodal applications.
DeepSeek-V3.2-Speciale
GPT-5.1 Instant
License
Usage and distribution terms
DeepSeek-V3.2-Speciale 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-V3.2-Speciale was released on 2025-12-01, while GPT-5.1 Instant was released on 2025-11-12.
DeepSeek-V3.2-Speciale is 1 month newer than GPT-5.1 Instant.
Dec 1, 2025
7 months ago
2w newerNov 12, 2025
8 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
DeepSeek-V3.2-Speciale is available from DeepSeek. GPT-5.1 Instant is available from OpenAI.
DeepSeek-V3.2-Speciale
GPT-5.1 Instant
Outputs Comparison
Key Takeaways
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against DeepSeek-V3.2-Speciale and GPT-5.1 Instant side-by-side, then vote on the output you prefer.
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FAQ
Common questions about DeepSeek-V3.2-Speciale vs GPT-5.1 Instant.