GPT-5.6 Luna in GitHub Copilot
OpenAI - Lightweight
In GitHub Copilot, GPT-5.6 Luna costs $0.2 per 1M input tokens and $1.2 per 1M output tokens, billed as AI credits at $0.01 each. A typical daily-coding request works out to about 0.3 credits (about $0.00) with auto model selection on. Rates verified against GitHub's rate sheet on 2026-08-17.
Token rates
- Input / 1M
- $0.20
- Cached input / 1M
- $0.02
- Output / 1M
- $1.20
- Cost per credit
- $0.01
Requests above 272,000 input tokens bill at the long-context tier ($0.40 in / $1.80 out per 1M).
Credits per request
Defined workload baskets, not measured tasks, with auto model selection on.
| Workload | Credits (auto on) | Credits (auto off) | Cost |
|---|---|---|---|
| Short chat turn | 0.1 | 0.2 | $0.00 |
| Daily coding request | 0.3 | 0.3 | $0.00 |
| Agent session step | 0.9 | 1.1 | $0.01 |
At about 0.3 credits per daily-coding request, GPT-5.6 Luna ranks #1 of 22 current models by cost, about 1x the cheapest (GPT-5.6 Luna).
Requests per plan allowance
Daily-coding requests the included monthly credits buy, before any overage.
| Plan | Credits / month | Requests |
|---|---|---|
| Copilot Pro | 1,500 | 5,341 |
| Copilot Pro+ | 7,000 | 24,928 |
| Copilot Max | 20,000 | 71,225 |
| Copilot Business | 1,900 | 6,766 |
| Copilot Enterprise | 3,900 | 13,888 |