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GPT-5.6 Luna

GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...

Thinking Mode
Parameters
N/A
Context
1,050,000 tokens
Released
Sep 7, 2026

Leaderboards

Average Score combining domain-specific Autobench scores; Higher is better

Performance vs. Industry Average

Intelligence

GPT-5.6 Luna is of higher intelligence compared to average (4.5), with an intelligence score of 4.7.

Price

GPT-5.6 Luna is cheaper compared to average ($1.13 per 1M Tokens) with a price of $0.43 per 1M Tokens.

Latency

GPT-5.6 Luna has a higher average latency compared to average (47.46s), with an average latency of 56.52s.

P99 Latency

GPT-5.6 Luna has a higher P99 latency compared to average (288.94s), taking 298.19s to receive the first token at P99 (TTFT).

Context Window

GPT-5.6 Luna has a larger context window than average (453k tokens), with a context window of 1050k tokens.

GPT-5.6 Luna - AutoBench