GPT-5.6 Luna

Last updated: August 11, 2026

Specs

Vendor	OpenAI
Released	July 9, 2026
Context window	1.05M tokens
Input	$0.1 / M tokens
Output	$0.6 / M tokens

Benchmarks

Strengths

Very cheap for a 1M-token context window
Built for latency-sensitive, high-volume traffic
Same document and image input as its siblings

Weaknesses

Not the tier for deep reasoning
Lower accuracy on hard coding problems

Best for

High-traffic chat
Intent classification and routing
Content generation at scale

Compare with other AI models