Deepseek V4 Pro vs GPT 5.4

Deepseek V4 Pro is 5.7× cheaper on input tokens than GPT 5.4. GPT 5.4 has a longer context window (1M vs 1M). Both models are accessible via the haimaker.ai OpenAI-compatible API at https://api.haimaker.ai/v1.

DeepSeek logo

Deepseek V4 Pro

deepseek/deepseek-v4-pro

Chat
Function CallingReasoning
OpenAI logo

GPT 5.4

openai/gpt-5.4

Chat
Function CallingVisionReasoning

Side-by-side specifications

SpecDeepseek V4 ProGPT 5.4
ProviderDeepSeekOpenAI
Full IDdeepseek/deepseek-v4-proopenai/gpt-5.4
Modechatchat
ParametersN/AN/A
Context window1M1M
Max output384K128K
Input price (per 1M)$0.43$2.50
Output price (per 1M)$0.87$15.00
LicenseN/AN/A
ArchitectureN/AN/A

Feature support

FeatureDeepseek V4 ProGPT 5.4
Function Calling✓ Supported✓ Supported
Reasoning✓ Supported✓ Supported
Vision—✓ Supported

Frequently asked questions

Which is cheaper, Deepseek V4 Pro or GPT 5.4?

Deepseek V4 Pro is cheaper at $0.43 per 1M input tokens vs $2.50 for GPT 5.4.

Which has the larger context window, Deepseek V4 Pro or GPT 5.4?

GPT 5.4 accepts up to 1M input tokens vs 1M for Deepseek V4 Pro.

Can I use both Deepseek V4 Pro and GPT 5.4 via the same API?

Yes. haimaker.ai exposes both deepseek/deepseek-v4-pro and openai/gpt-5.4 on the same OpenAI-compatible endpoint at https://api.haimaker.ai/v1, so you can switch between them by changing the model parameter in your request.

Try Deepseek V4 Pro or GPT 5.4 via the haimaker API

One OpenAI-compatible endpoint. Switch between them by changing the model parameter.

Get API Access