GPT 5.6 Luna
OpenAI · text, image → text
GPT-5.6 Luna is designed for cost-sensitive, high-volume workloads. It roughly corresponds to the nano model tier used in earlier GPT-5 families.
Input$0.2 /M
Output$1.2 /M
Cache read$0.02 /M
← ModelsGPT 5.6 LunaO3 Mini
GPT 5.6 Luna vs O3 Mini
Compare GPT 5.6 Luna from OpenAI and O3 Mini from OpenAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
GPT 5.6 LunaO3 Mini+ Add model · 2/4
O3 Mini
OpenAI · text, image → text
OpenAI's latest fast inference model excels at STEAM tasks and offers exceptional cost-effectiveness. Official support for cache hits reduces input prices by half.
Input$1.1 /M
Output$4.4 /M
Cache read$0.55 /M
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
GPT 5.6 Luna
O3 Mini
Input /M
$0.2
$1.1
Output /M
$1.2
$4.4
Cache read /M
$0.02
$0.55
Context length
1,050,000
200,000
Max output
128,000
100,000
Time to First Token
5.0 s
10.9 s
Throughput
47.2 tok/s
474.2 tok/s
Modalities
textimage
textimage
Supported Parameters
toolsthinkingstructured outputs
thinking
API Formats
chat_completions · responses
Released
July 9, 2026
December 20, 2024
Promotional prices show the discounted rate; see each model page for promotion windows.
Activity Past 30 Days
Daily traffic served through AIHubMix — how demand for each model is trending.
gpt-5.6-lunao3-mini
Tokens / day
-
Requests / day
-
Performance Past 3 Days
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
gpt-5.6-lunao3-mini
Throughput (tok/s)
-
TTFT (s)
-
Uptime (%)
-
Cost calculator
Estimate your monthly bill for the same workload on each model.
GPT 5.6 Luna
$30.00 /mo
O3 Mini
$132 /mo
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: GPT 5.6 Luna, O3 Mini?
GPT 5.6 Luna: $1.2/M output tokens; O3 Mini: $4.4/M. Use the cost calculator above to estimate your own workload.
Which responds faster?
GPT 5.6 Luna: 5.0s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
How large is each context window?
GPT 5.6 Luna accepts 1,050,000 and O3 Mini accepts 200,000 input tokens. Maximum output per request is 128,000 tokens on GPT 5.6 Luna and 100,000 tokens on O3 Mini.
Which one generates tokens faster?
O3 Mini at 474.2 tok/s and GPT 5.6 Luna at 47.2 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
What inputs and capabilities does each model support?
GPT 5.6 Luna accepts text and image input and supports tool calling, thinking and structured outputs; O3 Mini accepts text and image input and supports thinking.
Can I call GPT 5.6 Luna and O3 Mini with the same API key?
Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.
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