Last refreshed 2026-07-09. Next refresh: weekly.
Why use GPT-5.6 Luna on OpenRouter?
OpenRouter offers GPT-5.6 Luna with pay-as-you-go pricing at $1.00/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare GPT-5.6 Luna across 2 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: openai/gpt-5.6-lunaopenai/gpt-5.6-lunaRequest example
openai/gpt-5.6-luna.Gotchas
- Use provider model ID "openai/gpt-5.6-luna", not the LLMReference slug "gpt-5.6-luna".
Compare GPT-5.6 Luna Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| OpenAI API | $1.00 | $6.00 |
| OpenRouter | $1.00 | $6.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $1.00 |
| Output tokens | $6.00 |
Capabilities
About GPT-5.6 Luna
OpenAI's fast, low-cost GPT-5.6 model. Luna is the affordable tier in the Sol, Terra, and Luna lineup, optimized for latency-sensitive applications such as summarization, drafting, autocomplete, and routine automation. Generally available July 9, 2026 across ChatGPT, Codex, and the OpenAI API (model ID gpt-5.6-luna). Supports text and image inputs, reasoning, tool use, prompt caching, and Batch API with a 1,050,000-token context window and 128K max output.