GPT-5.3 Now Available

AI API at
75% Less Cost

Drop-in replacement for OpenAI's API. Same endpoints, same SDKs, dramatically lower prices.

Just change the base URL

// Before (OpenAI)
baseURL: "https://api.openai.com/v1"

// After (Smart AIPI) - 75% cheaper!
baseURL: "https://api.smartaipi.com/v1"

Available Models

Access all frontier models through a single API

Frontier language models for general tasks

Optimized for code generation & understanding

Coming Soon

Advanced reasoning with chain-of-thought

Pay only for what you use. 75% cheaper than OpenAI.

Model	Input (per 1M tokens)	Output (per 1M tokens)	Context
gpt-5.3-codex Recommended	$1.25	$3.75	1M tokens
gpt-5.3	$1.25	$3.75	1M tokens
gpt-5.2-codex	$1.25	$3.75	1M tokens
gpt-5.1	$0.625	$2.50	256K tokens
gpt-5.1-codex	$0.625	$2.50	256K tokens
gpt-5.3-codex-max	$1.25	$3.75	1M tokens
gpt-5-codex-mini	$0.0375	$0.15	128K tokens
o3, o3-mini, o4-mini Coming Soon	Reasoning models coming soon

Model	Size	Quality	Price per Image
gpt-image-1	1024x1024	Standard	$0.040
gpt-image-1	1024x1024	HD	$0.080
gpt-image-1	1024x1792 / 1792x1024	Standard	$0.080
gpt-image-1	1024x1792 / 1792x1024	HD	$0.120

Works seamlessly with your favorite tools

Use Smart AIPI as your OpenCode backend. Full codebase understanding with our Codex models.

# Set in your config

OPENCODE_API_BASE=https://api.smartaipi.com/v1

OPENCODE_API_KEY=your-key

Pipe terminal output into our Codex models for instant debugging and code generation.

# Debug errors instantly

cat error.log | codex fix --model gpt-5.3-codex

Get your API key in seconds and start building with AI.