OpenAI
OpenAI: GPT-5.6 Luna Pro
openai/gpt-5.6-luna-pro-20260709
GPT-5.6 Luna Pro is the same underlying model as [GPT-5.6 Luna](https://openrouter.ai/openai/gpt-5.6-luna), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.
OpenAI: GPT-5.6 Luna Pro usage over time
OpenRouter share of tokens, by day.
OpenAI: GPT-5.6 Luna Pro holds 0.36% today, down from 1.40% at the start of the visible window.
Rank history
Adoption curve vs the pantheon
OpenAI: GPT-5.6 Luna Pro's share plotted against days since first tracked, overlaid on other current leaders on the same axis. The question every new-model page asks: is this one going to make it?
Citable stat
As of 2026-09-01, OpenAI: GPT-5.6 Luna Pro holds 0.4% of OpenRouter token share, down 0.33pp over 30 days. Source: Tidelines (OpenRouter).
Cost per session
Median dollars spent on one OpenAI: GPT-5.6 Luna Pro session, by coding agent and session length.
Token rate sets the price; session length and reasoning set the bill.
| Agent | 1 turn | 2–9 turns | 10–49 turns | 50+ turns |
|---|---|---|---|---|
| Kilo Code | — | $0.032 | $0.253 | $2.23 |
| Hermes Agent | $0.0048 | $0.023 | $0.174 | $1.95 |
| Codex | $0.0044 | $0.026 | $0.167 | $1.45 |
| Claude Code | — | $0.018 | $0.115 | $1.49 |
Where to run it
OpenAI: GPT-5.6 Luna Pro pricing by provider
Per-provider pricing, context, and uptime via OpenRouter. Sorted by output price.
OpenAI: GPT-5.6 Luna Pro is served by 5 tracked endpoints on OpenRouter. The cheapest output price is $0.60 per million tokens from OpenAI · 1050k, and the most expensive is $2.40 from OpenAI · 1050k. The largest context window offered is 1050k tokens. Prices are list rates and refresh daily.
| Provider | Input $/M | Output $/M | Context | Uptime |
|---|---|---|---|---|
| OpenAI · 1050k | $0.10 | $0.60 | 1050k | 100.00% |
| Azure · 1050k | $0.20 | $1.20 | 1050k | 99.66% |
| OpenAI · 1050k | $0.20 | $1.20 | 1050k | 99.99% |
| Azure · 1050k | $0.22 | $1.32 | 1050k | — |
| OpenAI · 1050k | $0.40 | $2.40 | 1050k | — |