Models

GPT 5.2 vs GPT 5.6 Luna

Compare GPT 5.2 from OpenAI and GPT 5.6 Luna 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.

OpenAIGPT 5.2OpenAIGPT 5.6 Luna
OpenAI logo
GPT 5.2
OpenAI · text, image, pdf → text

GPT‑5.2 builds on GPT‑5.1 with improvements that make interactions more reliable, flexible, and user-friendly. The focus is on delivering clearer responses, better adaptability, and enhanced control for diverse tasks. Key highlights include: Accelerate agent development: Build AI agents for analytics, decision support, code modernization, and data pipelines. Greater consistency: Produces more predictable and accurate outputs aligned with user instructions. Adaptive reasoning: Handles complex queries with improved depth while remaining efficient for simpler tasks. Expanded context handling: Supports longer inputs for multi-step workflows and richer conversations. Refined customization: Offers better control over tone, style, and structured output for tailored experiences. Broader applicability: Strengthens performance across a wide range of domains while maintaining clarity and safety.

Input$1.75 /M
Output$14 /M
Cache read$0.175 /M
OpenAI logo
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$1 /M
Output$6 /M
Cache read$0.1 /M

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

GPT 5.2
GPT 5.6 Luna
Input /M
$1.75
$1
Output /M
$14
$6
Cache read /M
$0.175
$0.1
Context length
400,000
1,050,000
Max output
128,000
128,000
Time to First Token
-
2.2 s
Throughput
-
88.4 tok/s
Modalities
textimagepdf
textimage
Supported Parameters
thinkingwebfunction callingstructured outputstools
toolsthinkingstructured outputs
API Formats
chat_completions · responses
Released
-
-

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-5.2gpt-5.6-luna

Tokens / day

-

Requests / day

-

Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

gpt-5.2gpt-5.6-luna

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

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Cost calculator

Estimate your monthly bill for the same workload on each model.

GPT 5.6 Luna
$150 /mo
GPT 5.2
$315 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: GPT 5.2, GPT 5.6 Luna?

GPT 5.6 Luna: $6/M output tokens; GPT 5.2: $14/M. Use the cost calculator above to estimate your own workload.

How large is each context window?

GPT 5.2 accepts 400,000 and GPT 5.6 Luna accepts 1,050,000 input tokens. Maximum output per request is 128,000 tokens on GPT 5.2 and 128,000 tokens on GPT 5.6 Luna.

What inputs and capabilities does each model support?

GPT 5.2 accepts text, image and PDF input and supports thinking, web search, function calling, structured outputs and tool calling; GPT 5.6 Luna accepts text and image input and supports tool calling, thinking and structured outputs.

Can I call GPT 5.2 and GPT 5.6 Luna 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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