GPT-5.6 Luna
gpt-5.6-lunagpt-56-lunaopenai-gpt-56-luna- ⚡ Fast, cost-efficient tier of OpenAI's GPT-5.6 series
- 📏 Massive 1M-token context window
- 🧠 Capable reasoning for its price tier
- 👁️ Vision input plus function calling and web search
- 🎯 Built for high-volume, latency-sensitive workloads
- 💬 Chat, classification, lightweight agentic tasks
OpenAI is an American artificial intelligence research organization headquartered in San Francisco, structured as both a for-profit public benefit corporation and a nonprofit foundation. The lab developed the GPT family of large language models, the DALL-E image generation…
Explore 29 more models by OpenAI →GPT-5.6 Luna is the fast, cost-efficient tier of OpenAI's GPT-5.6 series, released in July 2026. It targets high-volume, latency-sensitive workloads — interactive chat, text classification, and lightweight agentic pipelines — while still offering meaningful reasoning quality for its price bracket. A one-million-token context window lets it hold entire codebases, document sets, or long conversation histories in a single pass, and it supports vision input, function calling, and web search out of the box.
Within OpenAI's lineup, Luna sits at the efficiency end of the GPT-5.6 family, distinct from the heavier reasoning tiers represented by siblings like GPT-5.6 Terra and GPT-5.6 Sol. Each of these ships alongside a "Pro" counterpart, including GPT-5.6 Luna Pro, which trades some speed for additional headroom on harder tasks.
Choose Luna when throughput, responsiveness, and cost matter more than maximum depth — customer-facing assistants, batch classification, retrieval-augmented workflows over large contexts, and tool-driven agents that need to run frequently and cheaply.
This About section is AI-generated from public sources via VeniceStats + Venice inference, with no human editing. It may contain inaccuracies.
| Seller | Reputation↓ | Routing | Input $/M | Cached $/M | Output $/M | Categories | API |
|---|---|---|---|---|---|---|---|
| ▲ Apex Ant 0x73b4…e736 | 71.90 | #4 | $0.19 | $0.02 | $1.125 | chat,writing,tasks,coding,creative,vision,multimodal,reasoning,long-context,agents | openai-chat-completions |
| Venice.ai Proxy 0x1f22…18c9 | 70.55 | #3 | $0.125 | $0.0125 | $0.75 | chat,reasoning,vision,multimodal,web-search | openai-chat-completions |
| D5V1N2 0xd5e7…7be0 | 67.45 | #6 | $0.50 | $0.50 | $2.50 | chat,coding,reasoning,agent,fast,cheap,router,fallback | openai-chat-completions |
| GesundAI 0x983e…d826 | 66.98 | #1 | $0.06 | $0.006 | $0.36 | chat,code,reasoning,multimodal | openai-responses |
| Super Seeder 0xd19f…41f3 | 63.77 | #2 | $0.1238 | $0.0124 | $0.7425 | chat,reasoning,vision,multimodal,tools,long-context,cheap | openai-chat-completions |
| Edith AI 0xb269…b1a6 | 61.93 | #5 | $0.30 | $0.06 | $1.80 | chat,coding | openai-chat-completions |
| ZLKPro-Api 0x0b0b…f446 | 58.35 | gated | $0.058 | $0.005 | $0.135 | agent,chat,text,reasoning,research,smart,long-context,multimodal,visual | openai-chat-completions |
| bartly.eth64.de 0x666e…4666 | 53.43 | gated | $0.0024 | $0.0002 | $0.0145 | chat,coding,reasoning,vision,multimodal,web-search,function-calling | openai-chat-completions |
| Open Ant 0xe4f6…5bc4 | 50.00 | gated | $0.25 | $0.025 | $1.50 | chat,reasoning,vision,multimodal,tools,long-context | openai-chat-completions |
| Fire Ant 🔥🐜 0xbe05…bc5d | 50.00 | gated | $0.2047 | $0.0182 | $1.2279 | chat,coding,reasoning,tools | — |
| Xcat 0xbc33…b75f | 50.00 | gated | $0.20 | $0.05 | $1.50 | — | openai-chat-completions |
| Open Bird 0xc0f1…8183 | 50.00 | gated | $0.07 | $0.007 | $0.42 | chat,coding,reasoning | openai-chat-completions |
| Night Harbor AI 0x305e…fcf6 | 50.00 | gated | $0.04 | $0.005 | $0.15 | chat,fast,writing,coding,gpt56,luna,native-gpt | openai-chat-completions |
| NovaRoute AI 0xc50d…ed7b | 50.00 | gated | $0.0099 | $0.0099 | $0.0198 | chat,coding,code,reasoning,agent,tasks,frontier,value,gpt,surplus,openai-compatible,low-cost,verified,github,response-auth,base-usdc,monitored | openai-chat-completions |
| Hana Gateway ✅ 0x4ae1…117b | 45.41 | gated | $0.02 | $0.02 | $0.12 | chat,coding,reasoning,tools | openai-chat-completions |
| Xerxes Inference 0xdc73…65ce | 18.10 | gated | $0.12 | $0.03 | $0.36 | chat,code,reasoning,multimodal,vision | openai-responses |
| Apex TEE Test 0xe672…7955 | 15.22 | gated | $0.24 | $0.036 | $1.44 | chat,writing,tasks,coding,creative,vision,multimodal,reasoning,long-context,agents | openai-chat-completions |
| Vito-Minimax 0xddfa…27fe | 0.00 | gated | $0.5625 | $0.5625 | $3.375 | chat,coding,fast,via-minimax,alias | openai-chat-completions |
| CatGPT 0xb629…dab4 | 0.00 | gated | $0.35 | $0.04 | $1.75 | chat,code,reasoning,multimodal | openai-responses |
"Best price" and the seller table are live AntSeed catalog data (advertised $/1M tokens — or $ per generated image for unit-billed image models — not settled amounts). Reputation = buyer trust score (0-100, the AntSeed SDK's own formula). "Routing" = the SDK's default buyer routing (what the VPR desktop app ships with): a trust ≥ 60 gate on the effective reputation, then cheapest-first among routable sellers; live failover state (per-peer cooldowns) is buyer-side runtime and not included. Model knowledge (TLDR, provider, About) via the VeniceStats enrichment layer. Advertised catalog, not the model used in any specific purchase. "Usage on AntSeed" counts only settlements whose buyers share the per-model split on-chain (metadata v2/v3, opt-in), so every usage figure is a lower bound.