gpt-6-luna — API, Pricing & Context Window | Vivgrid

gpt-6-luna is the fast, low-cost model in OpenAI's gpt-6 family. It keeps the generation's 1.05M-token context window and 128K-token max output at $0.10 per 1M input tokens, making it the cheapest way on Vivgrid to run long-context agents at scale.

On Vivgrid, gpt-6-luna is served through a single OpenAI-compatible endpoint with geo-distributed acceleration across AMER, EMEA, and APAC, reachable with the same unified key as the rest of the catalog. It is available on both Chat Completions (/chat/completions) and the Responses API (/responses).

Specifications

Pricing

Pricing in USD per 1M tokens, matching the provider's rates.

Quick start

Call gpt-6-luna through Vivgrid's unified, OpenAI-compatible endpoint. Get an API key from the Vivgrid Console.

curl https://api.vivgrid.com/v1/chat/completions \
  -H "Authorization: Bearer $VIVGRID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-6-luna",
    "messages": [
      { "role": "user", "content": "Say hello in English, Chinese and Spanish." }
    ],
    "stream": true
  }'

Prompt caching is billed at $0.125 per 1M cache-write tokens, with cached reads at $0.01.

Requests beyond 272K input tokens are billed at the long-context rate: $0.20 input / $0.02 cached input / $0.25 cache write / $0.75 output per 1M tokens.

Ideal use cases

• High-volume agent and content pipelines where cost dominates
• Long-context retrieval, summarization, and classification
• Fast interactive assistants and chat products
• Fallback or draft model alongside gpt-6-sol / astra

Related models

• gpt-6-sol — the balanced gpt-6 model
• gpt-6-astra — the gpt-6 generation flagship
• gpt-5.6-luna — the prior-generation low-cost model