Intelligence
wins
54.8
GPT-5.5
40.8
DeepSeek V4 Pro
GPT-5.5 vs DeepSeek V4 Pro
GPT-5.5 from OpenAI and DeepSeek V4 Pro from DeepSeek are shown side by side so you can compare pricing, model IDs, context and output limits, modalities, tool use, release details, and benchmark results where data is available.
GPT-5.5OpenAI
DeepSeek V4 ProDeepSeek
Basic Information
Name
GPT-5.5GPT-5.5
Model id
GPT-5.5gpt-5.5
Intro
GPT-5.5GPT-5.5 is described by OpenAI as a smarter frontier model for coding, research, data analysis, and professional knowledge work. The official launch messaging emphasizes higher capability, better speed than previous difficult-work models, and strong performance on tasks involving documents and structured analysis. Its description should focus on broad professional intelligence rather than a single niche.
Author
GPT-5.5OpenAI
Released date
GPT-5.52026-04-23
Name
DeepSeek V4 ProDeepSeek V4 Pro
Model id
DeepSeek V4 Prodeepseek-v4-pro
Intro
DeepSeek V4 ProDeepSeek V4 Pro is described as a large-scale Mixture-of-Experts model with 1.6T total parameters and 49B activated parameters, while keeping a 1M-token context window for very large inputs. Its model cards emphasize advanced reasoning, coding, and long-horizon agent workflows rather than simple chat. The Pro variant is the capability-oriented member of the V4 family, making it better suited to full-codebase analysis, large research synthesis, and multi-step automation where depth matters more than the lowest possible latency.
Author
DeepSeek V4 ProDeepSeek
Released date
DeepSeek V4 Pro2026-04-24
Pricing
Input
GPT-5.5$5/M
Output
GPT-5.5$30/M
Cached input
GPT-5.5$0.5/M
Input
DeepSeek V4 Pro$1.8/M
Output
DeepSeek V4 Pro$3.5/M
Cached input
DeepSeek V4 Pro$0.015/M
Context & Output
Context length
GPT-5.51.1M
Max output tokens
GPT-5.5128K
Context length
DeepSeek V4 Pro1M
Max output tokens
DeepSeek V4 Pro384K
Capabilities
Reasoning
GPT-5.5
Knowledge
GPT-5.52025-12-01
Attachment
GPT-5.5
Input modalities
GPT-5.5Image, PDF, Text
Output modalities
GPT-5.5Text
Temperature
GPT-5.5
Tool use
GPT-5.5
Reasoning
DeepSeek V4 Pro
Knowledge
DeepSeek V4 Pro2025-05-01
Attachment
DeepSeek V4 Pro
Input modalities
DeepSeek V4 ProText
Output modalities
DeepSeek V4 ProText
Temperature
DeepSeek V4 Pro
Tool use
DeepSeek V4 Pro
Benchmark
Coding
wins
59.1
GPT-5.5
43.2
DeepSeek V4 Pro
GPT-5.5OpenAI
DeepSeek V4 ProDeepSeek
Knowledge & Reasoning
GPQA
wins93.5%
HLE
wins44.3%
GPQA
90.5%
HLE
33.5%
Coding
SciCode
wins56.1%
Terminal-Bench Hard
wins60.6%
SciCode
46.4%
Terminal-Bench Hard
41.7%
Instruction Following & Agent Tasks
IFBench
wins75.9%
AA-LCR
wins74.3%
Tau2
93.9%
IFBench
71.3%
AA-LCR
65%
Tau2
wins94.2%
FAQ
Which model is better, GPT-5.5 or DeepSeek V4 Pro?+
GPT-5.5 and DeepSeek V4 Pro should be compared by workload. This page places price, context, output limits, capabilities, and benchmark data side by side. It is also relevant to: deepseek vs chatgpt, chatgpt vs deepseek, deepseek vs chatgpt comparison, deepseek ai vs chatgpt, deepseek vs openai, openai vs deepseek.
Is DeepSeek V4 Pro cheaper than GPT-5.5?+
Use the pricing rows above to compare input, output, and cached input prices for GPT-5.5 and DeepSeek V4 Pro.
Which model supports a longer context length?+
GPT-5.5 lists 1.1M context length, while DeepSeek V4 Pro lists 1M.
Can I access both models through TokenHub?+
If both models are available in the TokenHub catalog, you can route requests to GPT-5.5 and DeepSeek V4 Pro through the TokenHub API.