DeepSeek-V3.2-Exp vs GPT-5.1 Instant
GPT-5.1 Instant significantly outperforms across most benchmarks. DeepSeek-V3.2-Exp is 11.3x cheaper per token.
DeepSeek · OpenAI · Updated for 2026
Which is better?
DeepSeek-V3.2-Exp 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.
On price, DeepSeek-V3.2-Exp is roughly 11.3x 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.
Based on current benchmark, pricing, and model metadata for 2026.
Choose DeepSeek-V3.2-Exp
- cost matters — it's about 11.3x cheaper per token
- you need open weights you can self-host or fine-tune
Choose GPT-5.1 Instant
- you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
- you process long inputs — it offers a 400,000 token context window
- you want the most recent training data — it shipped Nov 2025
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
DeepSeek-V3.2-Exp 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
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V3.2-Exp ($0.27/1M tokens) is 4.6x cheaper than GPT-5.1 Instant ($1.25/1M tokens).
For output processing, DeepSeek-V3.2-Exp ($0.41/1M tokens) is 24.4x cheaper than GPT-5.1 Instant ($10.00/1M tokens).
In conclusion, GPT-5.1 Instant is more expensive than DeepSeek-V3.2-Exp.*
* 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-Exp's 163,840 tokens. GPT-5.1 Instant can generate longer responses up to 128,000 tokens, while DeepSeek-V3.2-Exp is limited to 65,536 tokens.
Input Capabilities
Supported data types and modalities
GPT-5.1 Instant supports multimodal inputs, whereas DeepSeek-V3.2-Exp 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-Exp
GPT-5.1 Instant
License
Usage and distribution terms
DeepSeek-V3.2-Exp 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-Exp was released on 2025-09-29, while GPT-5.1 Instant was released on 2025-11-12.
GPT-5.1 Instant is 1 month newer than DeepSeek-V3.2-Exp.
Sep 29, 2025
11 months ago
Nov 12, 2025
9 months ago
1mo 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-V3.2-Exp is available from Novita. GPT-5.1 Instant is available from OpenAI.
DeepSeek-V3.2-Exp
GPT-5.1 Instant
Outputs Comparison
Judge for yourself.
Run your own prompts against DeepSeek-V3.2-Exp and GPT-5.1 Instant side-by-side, then vote on the output you prefer.
FAQ
Common questions about DeepSeek-V3.2-Exp vs GPT-5.1 Instant.