OpenAI: GPT-5.4 Pro API
About
Build advanced reasoning agents with OpenAI: GPT-5.4 Pro, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $30.00/1M input and $180.00/1M output tokens, native tool calling support. Access OpenAI: GPT-5.4 Pro via the Kilo Gateway API with up to 128K output tokens.
Capabilities
Input Modalities
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Output Modalities
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Limits
Context Window
1.1M
Tokens
Input Limit
1.1M
Tokens
Max Output
128K
Tokens
Pricing
Standard (per 1M tokens)
Input
$30.00
Output
$180.00
Frequently Asked Questions
OpenAI: GPT-5.4 Pro by Kilo Gateway costs $30.00 per 1M input tokens and $180.00 per 1M output tokens.
Model Details
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
KILO_API_KEY
API Base URL
https://api.kilo.ai/api/gateway