GPT-5.5 Pro vs DeepSeek V4 Pro

GPT-5.5 Pro 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.

Overall Recommendation

GPT-5.5 Pro is the quality-first choice for the hardest professional work and adds image and PDF input. DeepSeek V4 Pro is the value choice when $1.80/$3.50 pricing and a 384K maximum output matter more.

Comparison Highlights

Based On Current Page Data

GPT-5.5 ProOpenAI

DeepSeek V4 ProDeepSeek

How To Read It

Best For

Highest-difficulty professional reasoningdeliverables

Long-context reasoningcodebase analysiscost control

How To Read ItUse-case synthesis from model capabilities and positioning.

Workload Fit

Pro reasoningCodingResearch

ReasoningCodingLong context

How To Read ItThe workloads each model is most directly shaped for.

Input

$30/M

$1.2857/MEdge

How To Read ItLower is better when prompts or retrieval payloads are large.

Output

$180/M

$3.8571/MEdge

How To Read ItLower is better for reasoning-heavy or long-generation traffic.

Context length

1.1M

How To Read ItHigher is better for repositories, retrieval packs, and transcripts.

Input modalities

Image, PDF, TextEdge

Text

How To Read ItBroader input support reduces the need for separate vision or video models.

Model Selection Guide

GPT-5.5 ProOpenAI

Choose GPT-5.5 Pro When

TokenHub positions it as the high-compute GPT-5.5 tier for the hardest professional tasks
$30 input and $180 output per million tokens, prioritizing answer quality over cost
A 1.05M context window, 128K maximum output, and text, image, and PDF input

DeepSeek V4 ProDeepSeek

Choose DeepSeek V4 Pro When

A 44.3 Intelligence Index and 47.5 Coding Index in TokenHub’s max-effort profile
$1.80 input and $3.50 output per million tokens
A 1M context window and 384K maximum output for text-only workloads

Basic Information

GPT-5.5 ProOpenAI

DeepSeek V4 ProDeepSeek

Name

GPT-5.5 Pro

Model id

gpt-5.5-pro

Intro

GPT-5.5 Pro is the higher-compute variant of OpenAI’s GPT-5.5 generation, intended for the hardest professional tasks where answer quality matters more than speed. OpenAI materials describe the Pro tier as thinking harder for greater precision across coding, research, data analysis, and document-heavy work. It should be positioned for difficult reasoning and professional-grade deliverables rather than routine chat.

Author

OpenAI

Released date

2026-04-23

Context length

1.1M

Max output tokens

128K

Name

DeepSeek V4 Pro

Model id

deepseek-v4-pro

Intro

DeepSeek 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

Released date

2026-04-24

Context length

Max output tokens

384K

Name

GPT-5.5 Pro

Name

DeepSeek V4 Pro

Model id

gpt-5.5-pro

Model id

deepseek-v4-pro

Intro

Author

OpenAI

Author

DeepSeek

Released date

2026-04-23

Released date

2026-04-24

Context length

1.1M

Context length

Max output tokens

128K

Max output tokens

384K

Pricing

GPT-5.5 ProOpenAI

DeepSeek V4 ProDeepSeek

Input

$30/M

Output

$180/M

Cached input

n/a

Input

$1.2857/M

Output

$3.8571/M

Cached input

$0.0429/M

Input

$30/M

Input

$1.2857/M

Output

$180/M

Output

$3.8571/M

Cached input

n/a

Cached input

$0.0429/M

Capabilities

GPT-5.5 ProOpenAI

DeepSeek V4 ProDeepSeek

Reasoning

Knowledge

2025-12-01

Attachment

Input modalities

Image, PDF, Text

Output modalities

Text

Temperature

Tool use

Reasoning

Knowledge

2025-05-01

Attachment

Input modalities

Text

Output modalities

Text

Temperature

Tool use

Reasoning

Knowledge

2025-12-01

Knowledge

2025-05-01

Attachment

Input modalities

Image, PDF, Text

Input modalities

Text

Output modalities

Text

Output modalities

Text

Temperature

Tool use

Benchmark

GPT-5.5 ProOpenAINo benchmark data

DeepSeek V4 ProDeepSeek

Intelligence

n/a

Coding

n/a

Intelligence

wins44.3

Coding

wins47.5

Knowledge & Reasoning

GPQA

n/a

HLE

n/a

GPQA

wins88.8%

HLE

wins35.9%

Coding

SciCode

n/a

Terminal-Bench Hard

n/a

SciCode

wins50%

Terminal-Bench Hard

wins46.2%

Instruction Following & Agent Tasks

IFBench

n/a

AA-LCR

n/a

Tau2

n/a

IFBench

wins76.5%

AA-LCR

wins66.3%

Tau2

wins96.2%

FAQ

Which model is better, GPT-5.5 Pro or DeepSeek V4 Pro?

GPT-5.5 Pro 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 Pro?

Use the pricing rows above to compare input, output, and cached input prices for GPT-5.5 Pro and DeepSeek V4 Pro.

Which model supports a longer context length?

GPT-5.5 Pro 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 Pro and DeepSeek V4 Pro through the TokenHub API.