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Proprietary release

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Released July 2026

GPT-5.6 Luna: Release Intelligence, Performance & Price

Available providers

Amazon BedrockAmazon BedrockOpenAIOpenAI

Intelligence

GPT-5.6 Luna (max)GPT-5.6 Luna (max)
52
GPT-5.6 Luna (xhigh)GPT-5.6 Luna (xhigh)
50
GPT-5.6 Luna (high)GPT-5.6 Luna (high)
47
GPT-5.6 Luna (medium)GPT-5.6 Luna (medium)
39
GPT-5.6 Luna (low)GPT-5.6 Luna (low)
34
GPT-5.6 Luna (Non-reasoning)GPT-5.6 Luna (Non-reasoning)
27

Artificial Analysis Intelligence Index

Speed

GPT-5.6 Luna (high)GPT-5.6 Luna (high)
132 t/s
GPT-5.6 Luna (max)GPT-5.6 Luna (max)
130 t/s
GPT-5.6 Luna (medium)GPT-5.6 Luna (medium)
130 t/s
GPT-5.6 Luna (Non-reasoning)GPT-5.6 Luna (Non-reasoning)
123 t/s
GPT-5.6 Luna (xhigh)GPT-5.6 Luna (xhigh)
123 t/s
GPT-5.6 Luna (low)GPT-5.6 Luna (low)
121 t/s

Output speed

Cost

GPT-5.6 Luna (low)GPT-5.6 Luna (low)
$0.01
GPT-5.6 Luna (medium)GPT-5.6 Luna (medium)
$0.01
GPT-5.6 Luna (Non-reasoning)GPT-5.6 Luna (Non-reasoning)
$0.01
GPT-5.6 Luna (high)GPT-5.6 Luna (high)
$0.02
GPT-5.6 Luna (xhigh)GPT-5.6 Luna (xhigh)
$0.03
GPT-5.6 Luna (max)GPT-5.6 Luna (max)
$0.05

Per Intelligence Index Task

The GPT-5.6 Luna release offers 6 models, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across the 6 models.

  • For intelligence, the top model of GPT-5.6 Luna is GPT-5.6 Luna (max) at 52.
  • For output speed, the fastest model is GPT-5.6 Luna (high) at 132 t/s.
  • For latency, GPT-5.6 Luna (Non-reasoning) at 0.69s offers the lowest time to first answer token.
  • For pricing, GPT-5.6 Luna (low) at $0.01 offers the lowest cost per task. Prices vary up to 5.4x across models.

Input modality

Supports: text and image

Output modality

Supports: text

Context window1M
~1500 A4 pages of size 12 Arial font

Intelligence

Artificial Analysis Intelligence Index

Artificial Analysis Intelligence Index v4.1.1 incorporates 9 evaluations: GDPval-AA v2, 𝜏³-Banking, Terminal-Bench v2.1, SciCode, Humanity's Last Exam, GPQA Diamond, CritPt, AA-Omniscience, AA-LCR
Reasoning models are indicated by a lightbulb icon

Artificial Analysis Intelligence Index v4.1.1 includes: GDPval-AA v2, 𝜏³-Banking, Terminal-Bench v2.1, SciCode, Humanity's Last Exam, GPQA Diamond, CritPt, AA-Omniscience, AA-LCR. See Intelligence Index methodology for further details, including a breakdown of each evaluation and how we run them.

Intelligence Index vs. Cost per Intelligence Index Task

Artificial Analysis Intelligence Index · Weighted average cost (USD) per Artificial Analysis Intelligence Index task
Most attractive quadrant
GPT-5.6 Luna
Pareto line
Reasoning models are indicated by a lightbulb icon

Weighted average cost per Intelligence Index task. Each evaluation’s cost is calculated from input, cache hit, cache write, reasoning, and answer token prices, divided by task count, and weighted by its Intelligence Index weight.

Artificial Analysis Intelligence Index v4.1.1 includes: GDPval-AA v2, 𝜏³-Banking, Terminal-Bench v2.1, SciCode, Humanity's Last Exam, GPQA Diamond, CritPt, AA-Omniscience, AA-LCR. See Intelligence Index methodology for further details, including a breakdown of each evaluation and how we run them.

Cost

Cost per Intelligence Index Task

Weighted average cost (USD) per Artificial Analysis Intelligence Index task, segmented by token type. Lower is better
Reasoning models are indicated by a lightbulb icon

Weighted average cost per Intelligence Index task. Each evaluation’s cost is calculated from input, cache hit, cache write, reasoning, and answer token prices, divided by task count, and weighted by its Intelligence Index weight.

Speed & Latency

Output Speed

Output tokens per second · Higher is better
Reasoning models are indicated by a lightbulb icon

Tokens per second received while the model is generating tokens (ie. after first chunk has been received from the API for models which support streaming).

Figures represent performance of the model's first-party API (e.g. OpenAI for o1) or the median across providers where a first-party API is not available (e.g. Meta's Llama models).

Capability Scores

Capability Indices

Measures the performance of models on specific capabilities and industries
Agentic Index

Measures performance in agentic workflows, focusing on behaviors like tool use, planning, autonomy, and complex problem solving.

Finance & Accounting Index

Incorporates 5 evaluations: AA-Omniscience, GDPval-AA v2, Humanity's Last Exam, 𝜏³-Banking, AA-LCR · Higher is better

Strategy & Ops Index

Incorporates 4 evaluations: AA-Omniscience, GDPval-AA v2, 𝜏³-Banking, AA-LCR · Higher is better

Legal Index

Incorporates 5 evaluations: AA-Omniscience, GDPval-AA v2, AA-LCR, 𝜏³-Banking, Humanity's Last Exam · Higher is better

Healthcare & Medical Index

Incorporates 4 evaluations: AA-Omniscience, GDPval-AA v2, Humanity's Last Exam, 𝜏³-Banking · Higher is better

Engineering Index

Incorporates 6 evaluations: AA-Omniscience, Humanity's Last Exam, GPQA Diamond, CritPt, GDPval-AA v2, Terminal-Bench v2.1 · Higher is better

Economics Index

Incorporates 4 evaluations: AA-Omniscience, Humanity's Last Exam, GDPval-AA v2, AA-LCR · Higher is better

Reasoning models are indicated by a lightbulb icon

More from OpenAI

Further details

Weights
Provider Benchmarks
GPT-5.6 Luna (max)
OpenAI logoOpenAI
52
-
1M
$0.2
130
Not available
OpenAIAmazon Bedrock
View
GPT-5.6 Luna (xhigh)
OpenAI logoOpenAI
50
-
1M
$0.2
123
Not available
OpenAI
View
GPT-5.6 Luna (high)
OpenAI logoOpenAI
47
-
1M
$0.2
132
Not available
OpenAI
View
GPT-5.6 Luna (medium)
OpenAI logoOpenAI
39
-
1M
$0.2
130
Not available
OpenAI
View
GPT-5.6 Luna (low)
OpenAI logoOpenAI
34
-
1M
$0.2
121
Not available
OpenAI
View
GPT-5.6 Luna (Non-reasoning)
OpenAI logoOpenAI
27
-
1M
$0.2
123
Not available
OpenAIAmazon Bedrock
View