Which GPT-5.6 model should I choose?

Choose GPT-5.6 Luna for cost-sensitive high-volume work, GPT-5.6 Terra for balanced production use, and GPT-5.6 Sol for complex reasoning and coding.

Can I use GPT-5.6 through an API?

Yes. AIReiter provides GPT-5.6 API access through Chat Completions, Responses, and Messages-compatible endpoints on the GPT-5.6 API guide.

GPT-5.6 access

Access GPT-5.6 Sol, Terra, and Luna online

Q: How do I access GPT-5.6 online?

Open the GPT-5.6 access page, choose Luna, Terra, or Sol, and continue into AIReiter Chat with the selected model and prompt. Sending messages may require sign-in and available account credits. Developers can use the dedicated GPT-5.6 API guide for API keys, endpoints, and client setup.

Choose the right GPT-5.6 model, carry a starter prompt into the AIReiter chat workspace, or move to API setup when you are ready. Chat usage depends on your account and available credits.

Selected model

GPT-5.6 Luna

Prompt handoff

Prefilled in chat

Usage

Account credits

Open chat workspace Compare models API setup

The primary action opens AIReiter Chat with the selected model and prompt. Sending messages may require sign-in and available credits.

Static workspace preview

AIReiter Chat handoff

Luna

Your starter prompt

Summarize this customer support ticket, identify the user's core issue, and draft a helpful reply.

Model positioning preview

Optimized for cost-sensitive workloads such as summaries, support drafts, extraction, classification, and batch chat.

Speed

Fastest

Cost

Lowest

Capability

Everyday tasks

Open chat workspace

Preview only: this card shows the selected model positioning. The real model runs after you open AIReiter Chat and send a message.

Access paths

Choose the right GPT-5.6 access path

Open in AIReiter Chat

Recommended

Choose Luna, Terra, or Sol, carry your prompt into the chat workspace, and send when your account has available credits.

Open chat workspace

Use the API

Create an API key, copy an endpoint, and connect OpenAI-compatible clients, Codex CLI, Claude Code, or curl.

API setup

Migrate a client

Move an existing OpenAI-compatible setup to AIReiter by changing base URL, model ID, and auth header.

View migration setup

Model picker

Pick the right GPT-5.6 model

Use Luna as the low-cost starting point, Terra as the production default, and Sol when quality matters more than cost.

View API pricing

Prompt handoff

Prepare a GPT-5.6 prompt before opening chat

Edit the starter prompt here; the next step opens AIReiter Chat with this model and prompt prefilled.

Prompt

Open chat workspace View API setup

This page does not run the model inline. It hands the selected model and prompt to AIReiter Chat; sending may require sign-in and account credits.

Need API access instead?

The API guide keeps the developer funnel focused: pricing, model IDs, API keys, Codex CLI, Claude Code, Responses, Messages, and Chat Completions.

Chat/api/v1/chat/completions

Responses/api/v1/responses

Messages/api/v1/messages

Open GPT-5.6 API guide

GPT-5.6 access FAQ

How do I access GPT-5.6?

Use this page to choose a GPT-5.6 model and open AIReiter Chat with a prepared prompt. Developers can open the GPT-5.6 API guide for endpoints, API keys, and client setup.

Is gpt-5.6 the same as Sol?

OpenAI lists gpt-5.6 as an alias for gpt-5.6-sol. Use explicit Sol, Terra, or Luna IDs when you want deterministic routing.

Can developers use GPT-5.6 through AIReiter?

Yes. AIReiter supports GPT-5.6 through OpenAI-compatible Chat Completions, Responses, and Messages-style endpoints.