GPT-6 Luna

GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol. It is suited for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic tasks, and at higher reasoning effort it can take on complex software engineering and computer-use tasks that previously called for a Sol-tier model. It shares the GPT-6 family's gains in factual reliability and its clearer, more concise communication style.

openai/gpt-6-luna

Organization: OpenAI
Family: gpt-luna
Providers: 24
Context: 1,050,000
Output limit: 128,000
Knowledge: 2026-05-18
Release: 2026-09-22
Updated: 2026-09-22
Weights: Closed
Input: text, image, pdf
Output: text
Capabilities: Tools, Reasoning, Structured

Providers

Compare every cataloged offer for this model, including its provider, route, token limits, price, and capabilities.

35 offers · USD per million tokens

Provider	Model ID	Context	Output	Input / output · 1M	Reasoning	Tools	Structured	Details
AIHubMix	gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Amazon Bedrock	openai.gpt-6-luna	1,050,000	128,000	$0.11 / $0.55	Yes	Yes	Yes	View
Amazon Bedrock	us.openai.gpt-6-luna	1,050,000	128,000	$0.11 / $0.55	Yes	Yes	Yes	View
Amazon Bedrock	global.openai.gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Azure	gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Cloudflare AI Gateway	openai/gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Cortecs	gpt-6-luna	1,050,000	128,000	$0.12 / $0.60	Yes	Yes	Yes	View
CrossModel	openai/gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
DevPass (LLM Gateway)	gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
DigitalOcean	openai-gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Eden AI	openai/gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
GitHub Copilot	gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
GitLab Duo	duo-chat-gpt-6-luna	1,050,000	128,000	$0.00 / $0.00	Yes	Yes	Yes	View
Kilo Gateway	openai/gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
LLM Gateway	openai/gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
LLM Gateway	azure/gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Merge Gateway	openai/gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
NanoGPT	openai/gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Ofox	openai/gpt-6-luna	1,050,000	128,000	$0.08 / $0.40	Yes	Yes	Yes	View
OpenAI	gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
OpenCode Go	gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
OpenCode Zen	gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Amazon Bedrockvia OpenRouter	openai/gpt-6-luna unknown	1,050,000	128,000	$0.11 / $0.55	Yes	Yes	No	View
Azurevia OpenRouter	openai/gpt-6-luna unknown	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Azurevia OpenRouter	openai/gpt-6-luna unknown	1,050,000	128,000	$0.11 / $0.55	Yes	Yes	Yes	View
Azurevia OpenRouter	openai/gpt-6-luna unknown	1,050,000	128,000	$0.11 / $0.55	Yes	Yes	Yes	View
OpenAIvia OpenRouter	openai/gpt-6-luna unknown	1,050,000	128,000	$0.05 / $0.25	Yes	Yes	Yes	View
OpenAIvia OpenRouter	openai/gpt-6-luna unknown	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
OpenAIvia OpenRouter	openai/gpt-6-luna unknown	1,050,000	128,000	$0.20 / $1.00	Yes	Yes	Yes	View
Requesty	gpt-6-luna@eu	1,050,000	128,000	$0.12 / $0.60	Yes	Yes	Yes	View
Requesty	gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Venice AI	openai-gpt-6-luna	1,050,000	128,000	$0.125 / $0.625	Yes	Yes	Yes	View
Vercel AI Gateway	openai/gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View
Vercel AI Gateway	openai/gpt-6-luna-fast	1,050,000	128,000	$0.20 / $1.00	Yes	Yes	Yes	View
Vivgrid	gpt-6-luna	1,050,000	128,000	$0.10 / $0.50	Yes	Yes	Yes	View

Prices and limits apply to each offer. A dash means the value is not provided. OpenRouter offers show the hosting provider and routing channel separately.

Pricing

Compare token rates and cache charges across available routes and hosting configurations.

USD per million tokens

Input from$0.00Per 1M input tokens

Output from$0.00Per 1M output tokens

Available offers35Across 24 providers

Lowest listed input and output prices across the offers above; they may belong to different providers. These are base rates, before conditional pricing, discounts or additional fees.

Endpoint price comparisonLatest observed snapshot · 7 lowest-priced configurations

InputOutput

OpenAIopenai/flex

$0.05$0.25

Azureazure

$0.10$0.50

OpenAIopenai

$0.10$0.50

Amazon Bedrockamazon-bedrock/us-east-1

$0.11$0.55

Azureazure/us

$0.11$0.55

Azureazure/eu

$0.11$0.55

OpenAIopenai/fast

$0.20$1.00

openai/gpt-6-lunaObserved Sep 24, 2026, 11:31 AM UTC

Input: $0.10
Output: $0.50
Cache read: $0.01
Cache write: $0.125

Additional fees and pricing conditions

web search: $0.01 / search

overrides · USD per token for token prices; time windows use UTC.

[
  {
    "prompt": "0.0000002",
    "completion": "0.00000075",
    "input_cache_read": "0.00000002",
    "input_cache_write": "0.00000025",
    "min_prompt_tokens": 272000
  }
]

Hosting prices through OpenRouter All endpoints and cache rates

Endpoint	Input / 1M	Output / 1M	Cache read / 1M	Cache write / 1M
Amazon Bedrockamazon-bedrock/us-east-1	$0.11	$0.55	$0.011	$0.1375
Azureazure	$0.10	$0.50	$0.01	$0.125
Azureazure/us	$0.11	$0.55	$0.011	$0.1375
Azureazure/eu	$0.11	$0.55	$0.011	$0.1375
OpenAIopenai/flex	$0.05	$0.25	$0.005	$0.0625
OpenAIopenai	$0.10	$0.50	$0.01	$0.125
OpenAIopenai/fast	$0.20	$1.00	$0.02	$0.25

Each row is a hosting configuration. Open an offer in Providers for its full pricing conditions and additional fees. Endpoint observations may differ from the routing catalog's base price.

Performance

Review reported latency and output-throughput percentiles from the latest observed rolling window.

Latest 30-minute observation

Time to first token · milliseconds

Latency distributionRolling 30-minute snapshot · 6 endpoints

P50P75P90P99

Amazon Bedrockamazon-bedrock/us-east-1

764–8,059.98 ms

Azureazure

2,402.5–40,573.83 ms

Azureazure/us

2,849.5–40,890.46 ms

Azureazure/eu

2,612–21,436.34 ms

OpenAIopenai/flex

29,312–108,495.72 ms

OpenAIopenai

2,939.5–23,051.17 ms

All latency percentiles 7 endpoints

Endpoint	P50	P75	P90	P99
Amazon Bedrockamazon-bedrock/us-east-1	764 ms	1,074 ms	2,324.9 ms	8,059.98 ms
Azureazure	2,402.5 ms	6,040.75 ms	12,714.5 ms	40,573.83 ms
Azureazure/us	2,849.5 ms	5,503.5 ms	10,299.5 ms	40,890.46 ms
Azureazure/eu	2,612 ms	5,026 ms	8,668.6 ms	21,436.34 ms
OpenAIopenai/flex	29,312 ms	54,047.25 ms	75,979.8 ms	108,495.72 ms
OpenAIopenai	2,939.5 ms	4,959.5 ms	7,955.7 ms	23,051.17 ms
OpenAIopenai/fast	1,669 ms	2,689.75 ms	4,627 ms	18,492 ms

Output throughput · tokens per second

Throughput distributionRolling 30-minute snapshot · 6 endpoints

P50P75P90P99

Amazon Bedrockamazon-bedrock/us-east-1

43–206.09 t/s

Azureazure

38–181 t/s

Azureazure/us

70.5–276 t/s

Azureazure/eu

48–208.14 t/s

OpenAIopenai/flex

31–41 t/s

OpenAIopenai

61–142 t/s

All throughput percentiles 7 endpoints

Endpoint	P50	P75	P90	P99
Amazon Bedrockamazon-bedrock/us-east-1	43 t/s	92 t/s	140 t/s	206.09 t/s
Azureazure	38 t/s	95.25 t/s	136 t/s	181 t/s
Azureazure/us	70.5 t/s	218.25 t/s	253 t/s	276 t/s
Azureazure/eu	48 t/s	108 t/s	149 t/s	208.14 t/s
OpenAIopenai/flex	31 t/s	35 t/s	38 t/s	41 t/s
OpenAIopenai	61 t/s	82 t/s	104 t/s	142 t/s
OpenAIopenai/fast	72 t/s	113 t/s	142 t/s	198 t/s

Percentiles describe the observed request distribution. These are snapshots of a rolling window, not a historical time series.

Uptime

Compare successful request rates across the latest 5-minute, 30-minute, and 24-hour observations.

Successful requests by window

Availability by endpointCurrent overlapping windows · 7 endpoints

Endpoint5 minutes30 minutes24 hours

Amazon Bedrockamazon-bedrock/us-east-1Observed Sep 24, 2026, 11:31 AM UTC

100%

99.99%

AzureazureObserved Sep 24, 2026, 11:31 AM UTC

70.71%

75.78%

88.86%

Azureazure/usObserved Sep 24, 2026, 11:31 AM UTC

100%

93.97%

Azureazure/euObserved Sep 24, 2026, 11:31 AM UTC

100%

97.02%

OpenAIopenai/flexObserved Sep 24, 2026, 11:31 AM UTC

80.65%

84.87%

97.56%

OpenAIopenaiObserved Sep 24, 2026, 11:31 AM UTC

100%

99.93%

99.9%

OpenAIopenai/fastObserved Sep 24, 2026, 11:31 AM UTC

100%

99.98%

Reported by OpenRouter at the time of collection; rate-limited requests are excluded. A dash means no measurement was reported. This is not a live availability check.

Benchmarks

Review attributed evaluation results on each source's original scale.

External evaluations

openai/gpt-6-lunaObserved Sep 24, 2026, 11:31 AM UTC

Benchmark profileArtificial Analysis · shared source scale from 0 to 40

Intelligence

37.3

Sources: Artificial Analysis and Design Arena, via OpenRouter. Scores retain their original scales and are not Artificial Atlas ratings.

Detailed evaluations

Evaluation scoresAccuracy or item F1 · higher is better

tau bench verified airlineOpenAI: GPT-6 Luna

66%

gpqa diamondOpenAI: GPT-6 Luna

87.486%

Evaluation	Configuration	Source	Results	Details
tau bench verified airline	OpenAI: GPT-6 Lunaopenai/gpt-6-luna-20260922	OpenRouter	66%	Details
gpqa diamond	OpenAI: GPT-6 Lunaopenai/gpt-6-luna-20260922	OpenRouter	87.486%	Details
Composite indices	GPT-6 Luna (max)openai/gpt-6-luna-20260922	Artificial Analysis	Intelligence 37.3 · Coding — · Agentic —	Details

Sources: Artificial Analysis, Design Arena and OpenRouter. Evaluation configurations and scales differ; results are not interchangeable. Updated Sep 24, 2026.

Activity

Daily prompt and completion tokens reported for this model's routes in OpenRouter's top 50. Missing days have no published value.

Last 90 complete UTC days

Daily token usage482,238,558,830 reported tokens · 2 days with observations

410B0

2026-09-22
72,728,550,874 tokens

2026-09-23
409,510,007,956 tokens

Jun 26, 2026Sep 23, 2026

Daily observations · 2 days

Date (UTC)	Reported tokens	Reported routes
Sep 23, 2026	409,510,007,956	1
Sep 22, 2026	72,728,550,874	1

Source: OpenRouter (openrouter.ai/rankings), as of Sep 24, 2026. CC BY 4.0. Totals include only individually published routes. Tokenizers differ by provider; the aggregated “other” category is never assigned to a model.

Technical details & API

Explore specifications, supported parameters, reasoning controls, and API identifiers for each OpenRouter route.

Current route specifications

openai/gpt-6-lunaObserved Sep 24, 2026, 11:31 AM UTC

Context: 1,050,000
Maximum output: 128,000
Tokenizer: GPT
Input: file, image, text
Output: text
Moderation: Yes
Added to OpenRouter: 2026-09-22

Base URLhttps://openrouter.ai/api/v1

Model IDopenai/gpt-6-luna

Version IDopenai/gpt-6-luna-20260922

Reasoning

Required: No
Enabled by default: Yes
Default effort: medium
Supported efforts: max, xhigh, high, medium, low, none

Supported parameters

include_reasoning
max_completion_tokens
max_tokens
reasoning
reasoning_effort
response_format
seed
structured_outputs
tool_choice
tools

Frequently asked questions

Answers based on the model metadata and serving offers currently in the catalog.

How much does GPT-6 Luna cost?

Listed rates start at $0.00 per million input tokens and $0.00 per million output tokens. Prices vary by provider and configuration; see Pricing for details.

Which providers offer GPT-6 Luna?

There are 35 cataloged offers across 24 providers. Compare model IDs, prices and limits in Providers.

What is the context window?

The cataloged model context is 1,050,000 tokens. Each serving endpoint may apply a different limit.

Does it support tools and structured output?

Tool calling: Yes. Structured output: Yes. Support can vary by endpoint.

Catalog history · 1 recorded revision

Metadata observations since this model was first cataloged. These are not model release versions.

Sep 23, 2026 · efeb9b33f0b6