DeepSeek-V3.2 (Thinking) vs GPT-5.1 Codex Comparison
Comparing DeepSeek-V3.2 (Thinking) and GPT-5.1 Codex across benchmarks, pricing, and capabilities.
Performance Benchmarks
Comparative analysis across standard metrics
DeepSeek-V3.2 (Thinking) outperforms in 0 benchmarks, while GPT-5.1 Codex is better at 2 benchmarks (SWE-Bench Verified, Terminal-Bench 2.0).
GPT-5.1 Codex significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V3.2 (Thinking) ($0.28/1M tokens) is 4.5x cheaper than GPT-5.1 Codex ($1.25/1M tokens).
For output processing, DeepSeek-V3.2 (Thinking) ($0.42/1M tokens) is 23.8x cheaper than GPT-5.1 Codex ($10.00/1M tokens).
In conclusion, GPT-5.1 Codex is more expensive than DeepSeek-V3.2 (Thinking).*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.1 Codex accepts 400,000 input tokens compared to DeepSeek-V3.2 (Thinking)'s 131,072 tokens. GPT-5.1 Codex can generate longer responses up to 128,000 tokens, while DeepSeek-V3.2 (Thinking) is limited to 65,536 tokens.
Input Capabilities
Supported data types and modalities
GPT-5.1 Codex supports multimodal inputs, whereas DeepSeek-V3.2 (Thinking) does not.
GPT-5.1 Codex can handle both text and other forms of data like images, making it suitable for multimodal applications.
DeepSeek-V3.2 (Thinking)
GPT-5.1 Codex
License
Usage and distribution terms
DeepSeek-V3.2 (Thinking) is licensed under MIT, while GPT-5.1 Codex 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 (Thinking) was released on 2025-12-01, while GPT-5.1 Codex was released on 2025-11-19.
DeepSeek-V3.2 (Thinking) is 0 month newer than GPT-5.1 Codex.
Dec 1, 2025
3 months ago
1w newerNov 19, 2025
3 months ago
Knowledge Cutoff
When training data ends
GPT-5.1 Codex has a documented knowledge cutoff of 2024-09-30, while DeepSeek-V3.2 (Thinking)'s cutoff date is not specified.
We can confirm GPT-5.1 Codex's training data extends to 2024-09-30, but cannot make a direct comparison without DeepSeek-V3.2 (Thinking)'s cutoff date.
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Sep 2024
Provider Availability
DeepSeek-V3.2 (Thinking) is available from DeepSeek. GPT-5.1 Codex is available from OpenAI. The availability of providers can affect quality of the model and reliability.
DeepSeek-V3.2 (Thinking)
GPT-5.1 Codex
Outputs Comparison
Key Takeaways
Detailed Comparison
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