When was GPT-5.6 Luna released?

OpenAI released GPT-5.6 Luna on 9 Jul 2026. It is available through the Opper gateway.

Does GPT-5.6 Luna support zero data retention?

With abuse monitoring, yes. On AWS Bedrock, Azure, OpenAI through the Opper gateway, prompts and outputs are not used for training and are kept only for abuse monitoring, for up to 30 days. Zero data retention, with no monitoring hold, is available on Azure under a signed Enterprise agreement.

Where is GPT-5.6 Luna hosted?

GPT-5.6 Luna runs on both EU and US hosting routes through the Opper gateway. Pick the route that matches your residency requirement.

Is GPT-5.6 Luna trained on prompts and outputs?

No. Every hosting route for GPT-5.6 Luna is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for GPT-5.6 Luna?

Yes. A GDPR Data Processing Agreement is available on at least one route serving GPT-5.6 Luna. Contact hello@opper.ai to receive it.

GPT-5.6 Luna

by OpenAI

All OpenAI releases

The lightest member of OpenAI's GPT-5.6 generation, GPT-5.6 Luna launched alongside Sol and Terra on July 9, 2026 and is tuned for speed and volume rather than maximum depth. It keeps the family traits, a 1.05 million token context window, 128K max output, reasoning support, vision, and structured output, in a much quicker package, and on agentic terminal benchmarks it performs on par with the previous GPT-5.5 generation. Luna is built for high-throughput work such as classification, summarization, extraction, and batch processing, where per-request speed compounds across millions of calls. Recall over very long inputs is where the bigger tiers pull ahead, so it fits best as the workhorse for shorter-context tasks at scale and as the fast layer in multi-model pipelines.

Call GPT-5.6 Luna on Opper with the OpenAI SDK. Sign up without a credit card. Get started

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Key info

Input

Output

Features

Context window

1.1M

Max output

128K

Input price

$0.20 /1M$0.02 cache read · $0.25 write

Output price

$1.20 /1M

Released

9 Jul 2026

EU residency available
US residency available
Zero data retention with abuse monitoring
Zero data retention on Enterprise
No training by default
GDPR DPA available

Available routes

GPT-5.6 Luna runs on 6 different routes through the Opper gateway. Compare residency, zero data retention and training posture at a glance, with full data-handling detail per route below. Zero data retention on Azure is available on Enterprise. In the EU it is served by Azure (Sweden). See every OpenAI model hosted in the EU.

Provider	Region	Training	Input	Output	Cache read
AWS Bedrock	Multi	No	$0.20	$1.20	$0.02$0.25 write
Azure	EU	No	$0.20	$1.20	$0.02$0.25 write
Azure	Multi	No	$0.20	$1.20	$0.02$0.25 write
Azure	EU	No	$0.20	$1.20	$0.02$0.25 write
Azure	Multi	No	$0.20	$1.20	$0.02$0.25 write
OpenAI	US	No	$0.20	$1.20	$0.02$0.25 write

Uptime and availability

GPT-5.6 Luna runs on 3 independently monitored routes through the Opper gateway. A direct integration leaves you on one of them, the gateway serves whichever is healthy.

100%effective uptime, last 30 days

Averaged across these routes on their own, a single provider reached 97.81% over the same window.

Daily status through the gateway, which serves each request from whichever route is healthy.

3 monitored providers serve GPT-5.6 Luna.

Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. See uptime for every provider Opper monitors.

Data handling per route

Each route hosting GPT-5.6 Luna has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

AWS Bedrock — Multi-region

Zero data retention with abuse monitoring: nothing is logged or used for training; content flagged by abuse monitoring is held for review. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: With abuse monitoring, flagged content held.
Training: No training on customer data.
Logging: None
Abuse monitoring: Always on, holds flagged content, 30 days, a person can view samples
GDPR DPA: DPA available
Transfer mechanism: SCCs

Azure — Sweden🇸🇪

Zero data retention: nothing is logged, held for abuse monitoring or used for training. Available under a signed Enterprise agreement. No training on customer data. EU; DPA available.

Zero data retention: Yes, on Enterprise. Nothing is logged, held for abuse monitoring or used for training.
Plan: Signed Enterprise agreement
Training: No training on customer data.
Logging: None
Abuse monitoring: No classifier
GDPR DPA: DPA available
Transfer mechanism: Not applicable — data stays in EU

Azure — Multi-region

Zero data retention: nothing is logged, held for abuse monitoring or used for training. Available under a signed Enterprise agreement. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: Yes, on Enterprise. Nothing is logged, held for abuse monitoring or used for training.
Plan: Signed Enterprise agreement
Training: No training on customer data.
Logging: None
Abuse monitoring: No classifier
GDPR DPA: DPA available
Transfer mechanism: SCCs

Azure — Sweden🇸🇪

Zero data retention with abuse monitoring: nothing is logged or used for training; content flagged by abuse monitoring is held for review. No training on customer data. EU; DPA available.

Zero data retention: With abuse monitoring, flagged content held.
Training: No training on customer data.
Logging: None
Abuse monitoring: On by default, holds flagged content, stored in Sweden, a person can view samples
GDPR DPA: DPA available
Transfer mechanism: Not applicable — data stays in EU

Azure — Multi-region

Zero data retention with abuse monitoring: nothing is logged or used for training; content flagged by abuse monitoring is held for review. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: With abuse monitoring, flagged content held.
Training: No training on customer data.
Logging: None
Abuse monitoring: On by default, holds flagged content, a person can view samples
GDPR DPA: DPA available
Transfer mechanism: SCCs

OpenAI — United States🇺🇸

Zero data retention with abuse monitoring: prompts and outputs are kept for up to 30 days for abuse monitoring only, and are not used for training. No training on customer data. US; SCCs; DPA available.

Zero data retention: With abuse monitoring, 30-day window.
Training: No training on customer data.
Logging: Abuse monitoring (30-day retention)
Abuse monitoring: On by default, holds flagged content, 30 days, a person can view samples
Caching: Content cached for replay
GDPR DPA: DPA available
Transfer mechanism: SCCs

Benchmarks

Independent benchmark scores — composite indices for reasoning, coding, and math, plus individual eval scores where available.

Global rank#70 of 675 LLMs

TierStrong

Intelligence Index37.3

Coding Index71.4

Reasoning & knowledge

GPQA Diamond

91%

Humanity's Last Exam

40%

Long-context reasoning

84%

Coding

SciCode

54%

See full leaderboard →Benchmarks via Artificial Analysis · View on AA

Get started

Call GPT-5.6 Luna through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

GPT-5.6 Luna is a premium model on Opper. Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

1import OpenAI from "openai";
2
3const client = new OpenAI({
4  apiKey: process.env.OPPER_API_KEY,
5  baseURL: "https://api.opper.ai/v3/compat",
6});
7
8const completion = await client.chat.completions.create({
9  model: "gpt-5.6-luna",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);