GPT-6 Luna
openai/gpt-6-lunaGPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol. It is suited for high-volume, latency-sensitive workloads such as chat, classification, and lightweight agentic tasks.
- Input price
- $0.10USD / 1M tokens
- Output price
- $0.50USD / 1M tokens
- Context window
- N/A
- Max output
- 128K
Try the model
Playground
Input⌘ / Ctrl + Enter
Try a prompt
OutputReady
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Choose an example or write a prompt, then click Run.
Specifications
Pricing
- Input
- $0.10 / 1M tokens
- Output
- $0.50 / 1M tokens
- Billing formula
- usage.prompt_tokens >= 272000 ? (usage.prompt_tokens * 0.2 / 1000000 + usage.completion_tokens * 0.75 / 1000000 - usage.cached_tokens * 0.09 / 1000000 + usage.cache_creation_tokens * 0.025 / 1000000) : (usage.prompt_tokens * 0.1 / 1000000 + usage.completion_tokens * 0.5 / 1000000)
Context & modalities
- Max output
- 128,000 tokens
- Input
- Text, image
- Output
- Text
Capabilities
- Chat
- Supported
- Vision
- Supported
- Reasoning
- Supported
- Structured output
- Supported
- Function calling
- Supported
- Audio input
- Not supported
Access
- Provider
- OpenAI
- Model ID
- openai/gpt-6-luna
- Execution
- sync
- API
- Responses API
- Endpoint
- /v1/responses
- API
- Chat Completions API
- Endpoint
- /v1/chat/completions
Start building
Send your first request
Choose either supported API with unified authentication and usage tracking.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/responses" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "openai/gpt-6-luna",
"input": "Hello",
"max_output_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"Choose your model
Compare models
| Model | Context | Input / 1M | Output / 1M | Released |
|---|---|---|---|---|
OpenAI: GPT-6 LunaThis model OpenAI | — | $0.10 | $0.50 | Sep 22, 2026 |
OpenAI | 1.1M | — | — | Sep 29, 2026 |
OpenAI | 1.1M | — | — | Sep 22, 2026 |
OpenAI | 1.1M | — | — | Sep 4, 2026 |
OpenAI | 1.1M | — | — | Jul 9, 2026 |
OpenAI | 1.1M | — | — | Jul 9, 2026 |