GPT-5.6 Luna: API pricing, context window and capabilities

Prices from official vendor price lists · October 2026

GPT-5.6 Luna costs $0.2 per 1M input tokens and $1.2 per 1M output tokens, with a 1.05M context window. Mid-priced: dearer than 33% of this rating, with gpt-oss-safeguard-20b as the nearest cheaper OpenAI option. Recorded for vision, reasoning, long context 1M+.

Visit OpenAI All OpenAI models

Capabilities

API $/1M (in / out)

$0.2 / $1.2

Context window

1.05M tokens

Price / mo

API only

Overview Reviews

GPT-5.6 Luna is an AI model from OpenAI, priced at $0.2 input and $1.2 output per 1M tokens. That places it in the budget tier of this rating — cheaper than 63% of the 205 priced models listed.

It holds 1.05M tokens in a single conversation, enough for a full codebase or a contract bundle in one pass. Capabilities recorded in this rating: text & chat, vision, reasoning, tool calling, structured JSON output. Access is through the API rather than a consumer subscription.

API price$0.2 / $1.2per 1M tokens, in / out

Context1.05M tokenstokens per conversation

VendorOpenAIall models from this vendor

TierBudgetcheaper than 63% of models

Cost calculator

1M tokens/mo10M tokens/mo50M tokens/mo200M tokens/mo

Standard$0.95~~AED 3 per month~~

With batch −50%$0.47~~AED 2 per month~~

With caching on input$0.90~~AED 3 per month~~

Standard$9.50~~AED 35 per month~~

With batch −50%$4.75~~AED 17 per month~~

With caching on input$9.05~~AED 33 per month~~

Standard$47.50~~AED 174 per month~~

With batch −50%$23.75~~AED 87 per month~~

With caching on input$45.25~~AED 166 per month~~

Standard$190~~AED 698 per month~~

With batch −50%$95.00~~AED 349 per month~~

With caching on input$181~~AED 665 per month~~

Assumes a 1:3 input-to-output ratio, which is typical for chat and generation. Dirham figures use 3.6725 per dollar. Batch and caching discounts apply where the vendor offers them.

Compared with alternatives

How GPT-5.6 Luna sits against its neighbours in this rating. Tap a card to open that model.

Step 3.7 Flash

Cheaper

Stepfun

$0.2 / $1.15262.1K tokens

MiniMax M3

Closest match

MiniMax

$0.3 / $1.21.05M tokens

GPT-5.4 Nano

Step up

OpenAI

$0.2 / $1.25400K tokens

Good and poor fit

Good fit

Multi-step analysis, planning and code review, where the first plausible answer is often wrong.
Reading screenshots, charts, scanned documents and photos.
Whole codebases, contract bundles and long transcripts in a single pass.

Poor fit

Long multi-step reasoning, where a larger model finishes in fewer attempts.

Related filters

Text & chat234 models for text generation and chat

Vision159 models that read images

Reasoning175 models that think before answering

Tool calling172 models that call your functions

Code execution47 models that run code in a sandbox

OpenAI30 models from this vendor

All 245 modelsThe full rating with filters and prices

Frequently asked questions

How much does GPT-5.6 Luna cost?

$0.2 / $1.2 per 1M tokens, input and output. In dirhams that is roughly AED 0.73 per 1M input tokens. Batch processing halves it where the vendor offers it.

What is the context window of GPT-5.6 Luna?

1.05M tokens in a single conversation.

What can GPT-5.6 Luna do?

In this rating it is recorded with: text & chat, vision, reasoning, tool calling, structured JSON output, code execution, long context 1M+, prompt caching, batch API, priority / fast tier, low latency, multilingual, proprietary API.

Is GPT-5.6 Luna a good choice?

It depends on the job. See the good-fit and poor-fit lists above, and compare against the neighbouring models before committing.

Ratings 1

Avg. score 5

Rate this page

Help us improve