Scheduled for retirement on Jan 11, 2028. Still available at the prices below until then.
Context
1.1M
Max output
128K
Serving providers
7
Cheapest input
$0.20 /1M
On-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments (committed-use discounts, provisioned throughput, negotiated rates) can be materially lower.

Benchmarks

independent evaluations · source: ARC Prize and Artificial Analysis
Speed & latency
Output speed
123 t/s
tokens / second
Time to first token
115.24s
latency
Headline indices
71.4
of 100
Frozen Sep 9, 2026
42.7
of 100
Frozen Sep 9, 2026
Individual benchmarks · click a row for effort variants
BenchmarkBest scoreEffortCost / task
APEX Agents36%default—
ARC-AGI-260%max$0.67
Automation Bench0.5default—
CritPt21%default—
GDPval v2Frozen Aug 18, 20261578.3default—
GPQA Diamond91%default—
Harvey Lab0.9default—
Humanity's Last Exam39%default—
IT-Bench SRE40%default—
Long-Context Reasoning84%default—
Mlcr OverallFrozen Sep 9, 20260.2default—
MMMU-Pro79%default—
Omniscience-10.3default—
Omniscience Accuracy0.4default—
Omniscience Non Hallucination0.3reasoning: false—
SciCode54%default—
Terminal Bench400.1default—
TerminalBench v2.181%default—
τ-bench Banking31%default—
Artificial Analysis last published scores for this benchmark on Sep 9, 2026. Scores here are frozen at that date, and models released since are not on it.
Artificial Analysis last published scores for this benchmark on Aug 18, 2026. Scores here are frozen at that date, and models released since are not on it.

Pricing detail

cost beyond the standard rate · source: models.dev
Long context (>200K)
$0.40 / $1.80
input / output · per 1M

Pricing by serving provider

standard tier · per 1M tokens · click a provider to expand

Input pricing runs from $0.20 to $1.00 per 1M tokens across 7 providers, so the dearest route costs 400% more than the cheapest for the same model.

Serving providerInput /1MOutput /1MEndpoints
Aihubmix$0.20$1.201
Azure$0.20$1.201
Amazon Bedrock$0.20$1.201
OpenAICheapest$0.20$1.201
Standardgpt-5.6-luna
ComponentUnitStandardBatch
Text cached in/1M tok$0.02—
Text cache write/1M tok$0.25—
Text input/1M tok$0.20$0.10
Text output/1M tok$1.20$0.60
OpenRouter$0.20$1.201
VercelVercel reseller quote$0.20$1.201
Databricks$1.00$6.001
OpenRouter (batch)$0.10$0.601
Databricks is dearest at $1.00 / $6.00

Price history

listed seller prices, input and output per 1M tokens
Input Output
Input down 80% since first tracked
$0.00$2.00$4.00$6.00Jul 10Jul 31Aug 28Sep 16$1.20$0.20

Cost calculator

estimate your monthly spend on this model
$136
estimated / month

Model IDs

copy the exact identifier for your platform
openai/gpt-5.6-luna:batchopenai/gpt-5.6-lunagpt-5.6-lunaazure/gpt-5.6-lunaglobal.openai.gpt-5.6-lunaaihubmix/gpt-5.6-lunaopenai/gpt-5.6-lunaopenai/gpt-5.6-lunaopenai/gpt-5.6-lunaopenai/gpt-5.6-luna-fastopenai/gpt-5.6-lunadatabricks/databricks-gpt-5-6-luna

Frequently asked questions

GPT-5.6 Luna pricing, context and availability

Is GPT-5.6 Luna still available?

Yes. GPT-5.6 Luna is scheduled for retirement on 2028-01-11.

How much does GPT-5.6 Luna cost?

GPT-5.6 Luna costs $0.20 per 1M input tokens from OpenAI, and $1.20 per 1M output tokens from OpenAI. Across 7 serving providers, input prices range from $0.20 to $1.00 per 1M tokens.

What is the context window of GPT-5.6 Luna?

GPT-5.6 Luna accepts up to 1.1M tokens of context and can return up to 128K output tokens.

Which providers serve GPT-5.6 Luna?

GPT-5.6 Luna is available from 7 serving providers, each with its own pricing and model ID. OpenAI is currently the cheapest.

What can GPT-5.6 Luna do?

GPT-5.6 Luna supports image input (vision), tool use, reasoning, prompt caching, structured output and web search.

Other OpenAI models

compare pricing across the OpenAI lineup
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026

Every weekday

AI moves fast. Here's your debrief.

News, analysis, tools, and more.

For people who build with AI