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OpenAI: gpt-5.6-luna:free
gpt-5.6-luna:free
1.1M context128K outReasoningToolsParallel toolsVisionFilesCacheStructuredWeb searchStreamingSystem msg
Released Jul 9, 2026Knowledge cutoff Feb 2026Updated Sep 15, 2026
GPT-5.6 Luna is designed for cost-sensitive, high-volume workloads. It roughly corresponds to the nano model tier used in earlier GPT-5 families.
Mode chatTokenizer GPTReasoning levels none, low, medium, high, maxModeratedDeprecation Jan 2028
All providers for this model are busy right now
Every upstream provider has hit its rate limit. The model comes back automatically once limits lift, usually within hours. Try again in a little while or switch to another model.
Request this model on DiscordPricing
Input price
$0.00/ 1M tokens
Output price
$0.00/ 1M tokens
Compatible endpoints -Vendor OpenAI
Uptime
Performance
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Usage & Ranking
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Supported parameters
All providers = every upstream serving this model supports it. Some providers = depends on which upstream handles the request. Default = the value sent when you leave the parameter unset.
| Parameter | Providers | Default |
|---|---|---|
| frequency_penalty | Some providers | Not sent by default |
| include_reasoning | All providers | - |
| max_completion_tokens | Some providers | - |
| max_tokens | All providers | - |
| presence_penalty | Some providers | Not sent by default |
| reasoning | All providers | - |
| reasoning_effort | All providers | - |
| repetition_penalty | Some providers | Not sent by default |
| response_format | All providers | - |
| seed | All providers | - |
| structured_outputs | All providers | - |
| temperature | Some providers | Not sent by default |
| tool_choice | All providers | - |
| tools | All providers | - |
| top_k | Some providers | Not sent by default |
| top_p | Some providers | Not sent by default |