GPT-6 Luna Pro

Name: OpenAI GPT-6 Luna Pro
Price: 0.1 USD
Availability: InStock
Author: OpenAI

openai/gpt-6-luna-pro

GPT-6 Luna Pro is the same GPT-6 Luna model, OpenAI's most efficient GPT-6 tier, served in OpenAI's pro reasoning mode instead of standard mode. Pro mode spends more model work per request and returns one final answer, which OpenAI says can improve reliability on difficult tasks while raising latency and token usage. It suits occasional hard requests in a Luna-based workload; for routine, latency-sensitive or high-volume traffic, OpenAI recommends standard mode.

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Input price: $0.10USD / 1M tokens
Output price: $0.50USD / 1M tokens
Context window: 1.1M
Max output: 128K

Production route

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Image URL or upload

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1.1M context128K max outputVision

Input$0.10/MOutput$0.50/MCache read$0.01/MCache write$0.13/M

OutputReady

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Model card

Specifications

Pricing

Input: $0.10 / 1M tokens
Output: $0.50 / 1M tokens
Cache read: $0.01 / 1M tokens
Cache write: $0.13 / 1M tokens

Context & modalities

Context window: 1,050,000 tokens
Max output: 128,000 tokens
Input: Text, image
Output: Text

Capabilities

Chat: Supported
Vision: Supported
Reasoning: Supported
Structured output: Supported
Function calling: Supported
Audio input: Not supported

Access

Provider: OpenAI
Model ID: openai/gpt-6-luna-pro
Execution: sync
Base URL: https://api.sandbase.ai
API: Responses API
Endpoint: /v1/responses
API: Chat Completions API
Endpoint: /v1/chat/completions

Start building

Send your first request

Choose either supported API with unified authentication and usage tracking.

Production API

Responses API endpoint

https://api.sandbase.ai/v1/responses

Model ID

openai/gpt-6-luna-pro

# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
  -X POST "https://api.sandbase.ai/v1/responses" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "openai/gpt-6-luna-pro",
  "input": "Hello",
  "max_output_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"

Choose your model

Compare models

All language models

Model	Context	Input / 1M	Output / 1M	Released
GPT-6 Luna ProThis model `OpenAI`	1.1M	$0.10	$0.50	Sep 22, 2026
GPT-6.1 Sol Pro `OpenAI`	1.1M	$2.00	$10.00	Sep 29, 2026
GPT-6.1 Sol `OpenAI`	1.1M	$2.00	$10.00	Sep 29, 2026
GPT-6 Luna `OpenAI`	1.1M	$0.10	$0.50	Sep 22, 2026
GPT-6 Sol Pro `OpenAI`	1.1M	$2.00	$10.00	Sep 22, 2026
GPT-6 Sol `OpenAI`	1.1M	$2.00	$10.00	Sep 22, 2026

Questions

FAQ

How do I call OpenAI GPT-6 Luna Pro through SandBase?

Create a SandBase API key, then send requests with the model ID "openai/gpt-6-luna-pro" to Responses API (/v1/responses) or Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.

How much does OpenAI GPT-6 Luna Pro cost?

$0.10 per 1M input tokens and $0.50 per 1M output tokens, billed per request from your SandBase balance. Discounts, when available, are shown in the pricing on this page.

What is the context window of OpenAI GPT-6 Luna Pro?

1.1M tokens of context, with up to 128K output tokens per response.

Which features does OpenAI GPT-6 Luna Pro support?

OpenAI GPT-6 Luna Pro supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.

Do I need a separate OpenAI account?

No. One SandBase API key and balance gives you access to OpenAI GPT-6 Luna Pro and the other models in the catalog; you do not need to sign up with OpenAI separately.