OpenAI: GPT-5.1 Codex Mini API
About
Integrate multimodal vision capabilities using OpenAI: GPT-5.1 Codex Mini, designed to process both text and images seamlessly. This model delivers cost-effective pricing at $0.25/1M input and $2.00/1M output tokens, native tool calling support. Access OpenAI: GPT-5.1 Codex Mini via the Helicone API with up to 128K output tokens.
Capabilities
Input Modalities
textimage
Output Modalities
textimage
Limits
Context Window
400K
Tokens
Input Limit
400K
Tokens
Max Output
128K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.25
Output
$2.00
Caching (per 1M tokens)
Read
$0.02
Frequently Asked Questions
OpenAI: GPT-5.1 Codex Mini by Helicone costs $0.25 per 1M input tokens and $2.00 per 1M output tokens. Cached reads cost $0.02 per 1M tokens.
Model Details
ID
gpt-5.1-codex-mini
Provider
HeliconeFamily
gpt-codex
Release Date
Jan 1, 2025
Knowledge Cutoff
Jan 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
HELICONE_API_KEY
API Base URL
https://ai-gateway.helicone.ai/v1