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OpenAI: GPT Luna Latest API Pricing

OpenAI: GPT Luna Latest is an API model from ~openai. It costs $0.1 per 1M input tokens and $0.5 per 1M output tokens, with cached input at $0.01. Its context window is 1,050,000 tokens with up to 128,000 output tokens. A workload of 10M input + 2M output tokens costs about $2 per month.

Input

$0.1

per 1M tokens

Output

$0.5

per 1M tokens

Cached input

$0.01

per 1M tokens

Context window

1.05M

1,050,000 tokens

Blended (80/20)

$0.18

per 1M tokens

This model always redirects to the latest model in the GPT Luna family.

How much does OpenAI: GPT Luna Latest cost for a real workload?

At 10M input + 2M output tokens per month, OpenAI: GPT Luna Latest costs about $2 ($1 input + $1 output). Try your own volumes in the cost calculator.

What are cheaper alternatives to OpenAI: GPT Luna Latest?

PrismML: Ternary Bonsai 2 27B — $0.075 in / $0.5 out per 1M
DeepSeek: DeepSeek Flash Latest — $0.07 in / $0.5 out per 1M
ByteDance Seed: Seed-2.0-Mini — $0.1 in / $0.4 out per 1M
Google: Gemini 2.5 Flash Lite — $0.1 in / $0.4 out per 1M
OpenAI: GPT-4.1 Nano — $0.1 in / $0.4 out per 1M
Z.ai: GLM 4.7 Flash — $0.0605 in / $0.4 out per 1M

Where to run OpenAI: GPT Luna Latest

AI/ML API: one API key for 400+ models, including most models tracked here · Novita AI: pay-as-you-go APIs for open models (DeepSeek, Qwen, Llama and more) plus GPU cloud. Prices there follow each platform's own catalog and can differ from the list prices tracked here.

Run it on AI/ML API →Run it on Novita AI →

Disclosure: links to these platforms may be affiliate links — if you sign up or buy through them, LLMPrices may earn a commission at no extra cost to you.

Compare OpenAI: GPT Luna Latest with other models

OpenAI: GPT Luna Latest vs OpenAI: GPT Mini LatestOpenAI: GPT Luna Latest vs OpenAI: GPT Sol LatestOpenAI: GPT Luna Latest vs OpenAI: GPT Terra LatestOpenAI: GPT Luna Latest vs OpenAI: GPT Astra Latest

Frequently asked questions

How much does OpenAI: GPT Luna Latest cost?

OpenAI: GPT Luna Latest costs $0.1 per 1M input tokens and $0.5 per 1M output tokens (list price, snapshot October 22, 2026). At 10M input + 2M output tokens per month that is about $2.

What is the context window of OpenAI: GPT Luna Latest?

OpenAI: GPT Luna Latest has a context window of 1,050,000 tokens and can return up to 128,000 output tokens per response.

What are cheaper alternatives to OpenAI: GPT Luna Latest?

Cheaper models include PrismML: Ternary Bonsai 2 27B ($0.075 in / $0.5 out), DeepSeek: DeepSeek Flash Latest ($0.07 in / $0.5 out), ByteDance Seed: Seed-2.0-Mini ($0.1 in / $0.4 out). See the full list on this page.

Is OpenAI: GPT Luna Latest free to use?

No. OpenAI: GPT Luna Latest is a paid model at $0.1 input / $0.5 output per 1M tokens. 21 free models are listed on the free models page.

Provider: ~openai · Model ID: ~openai/gpt-luna-latest · Modality: text+image+file->text · Price snapshot October 22, 2026, refreshed daily. How we collect prices