OpenAI
GPT-5.5 Pro, GPT-5.4, GPT-5, GPT-4o and more via the OpenAI API
OpenAI is the leading AI research company behind the GPT series of large language models. Their API provides access to a range of models optimised for different cost, speed, and capability trade-offs — from the highly capable GPT-5.4 and GPT-5 flagships to fast, cost-efficient variants like GPT-5.4 mini and GPT-5 nano. OpenAI models excel at instruction following, code generation, complex reasoning, and multimodal tasks.
Official documentationAvailable Models
GPT-5.5 Pro
OpenAI's most capable model. Maximum reasoning and multimodal performance for the most demanding tasks.
Best for: Frontier reasoning, complex agentic workflows
GPT-5.5
GPT-5.5 flagship. Excellent reasoning, long-context retention, and multimodal capability.
Best for: Complex analysis, document Q&A, coding
GPT-5.4 Pro
GPT-5.4 Pro — enhanced variant with deeper reasoning and higher quality output than GPT-5.4.
Best for: Advanced reasoning, high-quality generation
GPT-5.4
Strong general-purpose model. Best balance of capability and speed in the GPT-5.4 family.
Best for: General-purpose production workflows
GPT-5.4 mini
A faster, cost-efficient variant of GPT-5.4. Great for high-volume production workflows.
Best for: High-volume, cost-sensitive tasks
GPT-5.4 nano
The smallest and fastest GPT-5.4 variant. Ideal for latency-sensitive applications.
Best for: Low-latency, lightweight tasks
GPT-5.2 Pro
GPT-5.2 Pro — enhanced mid-tier model with stronger reasoning than GPT-5.2.
Best for: Demanding production workflows, reasoning tasks
GPT-5.2
Highly capable mid-tier model balancing performance and cost.
Best for: General-purpose production workflows
GPT-5.1
Strong instruction-following and coding model.
Best for: Code generation, structured output
GPT-5
The GPT-5 flagship model. Excellent reasoning, long-context retention, and multimodal capability.
Best for: Complex analysis, document Q&A
GPT-5 nano
Ultra-lightweight GPT-5 variant optimised for speed and low cost.
Best for: Simple extraction, routing tasks
GPT-4o
Multimodal model supporting text, images, and audio natively.
Best for: Multimodal workflows, image analysis
GPT-4o mini
Smaller, faster, cheaper variant of GPT-4o.
Best for: Cost-efficient, high-throughput tasks
Setup
Create an OpenAI account
Create an OpenAI account
Sign up at platform.openai.com. You will need to add a payment method before making API requests.
OpenAI PlatformGenerate an API key
Generate an API key
Navigate to API Keys in the left sidebar. Click "Create new secret key", give it a name (e.g. CipherSense), and copy the key immediately — it is only shown once.
Set usage limits (recommended)
Set usage limits (recommended)
Under Settings > Limits, configure a monthly spend cap to avoid unexpected charges. You can also set notification thresholds.
Add the provider in CipherSense
Add the provider in CipherSense
Go to Organization Settings > LLM Providers > Add Provider. Select OpenAI, paste your API key, and click Save.
Connection Fields
Fields required when adding this provider in Organization Settings › LLM Providers.
| Field | Required | Description |
|---|---|---|
| API Key | Required | Your OpenAI secret key. Found at platform.openai.com/api-keys. |
Common Use Cases
Ready to add OpenAI?
Configure this provider in your Organisation Settings and use it in any workflow.