GPT-5.6 Luna
Fastby OpenAI
The fast, low-cost tier of OpenAI's newest GPT-5.6 family.
At a glance
- Provider
- OpenAI
- Best for
- Fast
- Reads images
- Yes
- Price
- from $10 / 1M tokens
- Subscription
- None — pay as you go
Benchmarks
Higher is better.
- GPQA Diamond· graduate-level reasoning
- 91.1%
- AA Coding Index· real-world coding (composite)
- 71.4%
Source: artificialanalysis.ai, as of 13 Aug 2026. Figures are publisher-reported where not independently verified.
Use GPT-5.6 Luna without a subscription
On the GPQA Diamond graduate-level reasoning benchmark, GPT-5.6 Luna scores 91.1%. anyAInow gives you GPT-5.6 Luna alongside every other top AI model from a single balance — from $10 / 1m tokens, with no monthly fee and tokens that never expire. Start a chat on GPT-5.6 Luna, switch to another model mid-conversation, or run two models side by side to compare their answers. Top up from $5 and only pay for what you use.
Other models
GPT-5 nano
Fast everyday tasks at no token cost.
GPT-5.4 mini
Fast, capable and great value for routine work.
GPT-5.4
A balanced mix of power and cost.
GPT-5.5
OpenAI's top model for complex reasoning.
GPT-5.6 Terra
The balanced GPT-5.6 — strong performance at mid-tier cost.
GPT-5.6 Sol
OpenAI's newest flagship for the hardest reasoning tasks.