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Kilo Gateway

OpenAI: GPT-5.1 Chat API

Kilo Gateway
About

Integrate multimodal vision capabilities using OpenAI: GPT-5.1 Chat, designed to process both text and images seamlessly. This model delivers cost-effective pricing at $1.25/1M input and $10.00/1M output tokens, native tool calling support. Access OpenAI: GPT-5.1 Chat via the Kilo Gateway API with up to 16K output tokens.

Capabilities

Input Modalities

imagepdftext

Output Modalities

text
Reasoning
No
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Fixed
Attachment
Supported
Limits
Context Window
128K

Tokens

Input Limit
128K

Tokens

Max Output
16K

Tokens

Pricing

Standard (per 1M tokens)

Input
$1.25
Output
$10.00

Caching (per 1M tokens)

Read
$0.13
Frequently Asked Questions

OpenAI: GPT-5.1 Chat by Kilo Gateway costs $1.25 per 1M input tokens and $10.00 per 1M output tokens. Cached reads cost $0.13 per 1M tokens.

Model Details
ID
openai/gpt-5.1-chat
Provider
Kilo Gateway
Family
Release Date
Nov 13, 2025
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
KILO_API_KEY
API Base URL
https://api.kilo.ai/api/gateway
Documentation