GPT 5.4 vs Grok 4

GPT 5.4 is 1.2× cheaper on input tokens than Grok 4. GPT 5.4 has a longer context window (1M vs 256K). Both models are accessible via the haimaker.ai OpenAI-compatible API at https://api.haimaker.ai/v1.

OpenAI logo

GPT 5.4

openai/gpt-5.4

Chat
Function CallingVisionReasoning
xAI logo

Grok 4

xai/grok-4

Chat
Function CallingWeb Search

Side-by-side specifications

SpecGPT 5.4Grok 4
ProviderOpenAIxAI
Full IDopenai/gpt-5.4xai/grok-4
Modechatchat
ParametersN/AN/A
Context window1M256K
Max output128K256K
Input price (per 1M)$2.50$3.00
Output price (per 1M)$15.00$15.00
LicenseN/AN/A
ArchitectureN/AN/A

Feature support

FeatureGPT 5.4Grok 4
Function Calling✓ Supported✓ Supported
Reasoning✓ Supported—
Vision✓ Supported—
Web Search—✓ Supported

Frequently asked questions

Which is cheaper, GPT 5.4 or Grok 4?

GPT 5.4 is cheaper at $2.50 per 1M input tokens vs $3.00 for Grok 4.

Which has the larger context window, GPT 5.4 or Grok 4?

GPT 5.4 accepts up to 1M input tokens vs 256K for Grok 4.

Can I use both GPT 5.4 and Grok 4 via the same API?

Yes. haimaker.ai exposes both openai/gpt-5.4 and xai/grok-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 GPT 5.4 or Grok 4 via the haimaker API

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

Get API Access