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GPT-5.6 Sol AI Chat Playground and API

Try GPT-5.6 Sol online for the most demanding coding, reasoning, and agent workflows in the GPT-5.6 family. Compare token pricing and integrate the API.

Input 250 credits / 1M tokens · Output 1,500 credits / 1M tokens
Run with API
GPT-5.6 Sol
gpt-5.6-sol
Streaming
AIReiter
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Model details

Use the same model key in Playground, API requests, and internal workflows.

Model ID
gpt-5.6-sol
Provider
OpenAI
Protocol
OpenAI Chat Completions · Anthropic Messages · OpenAI Responses
max_tokens
4,096
Input tokens
250 credits / 1M
Output tokens
1,500 credits / 1M

What You Can Do with GPT-5.6 Sol

Choose GPT-5.6 Sol for the highest-complexity work in the GPT-5.6 family, especially difficult code, reasoning, and agent tasks.

Flagship Reasoning

Use the strongest GPT-5.6 tier for difficult problems with several interacting constraints.

Complex Software Work

Design, debug, and review systems where shallow pattern matching is not enough.

Advanced Agents

Plan longer workflows, interpret tool results, and recover when an intermediate step fails.

Deep Technical Analysis

Compare architectures, risks, and implementation paths with explicit tradeoffs.

GPT-5.6 Sol Use Cases

Best suited to the hardest requests in a routed GPT-5.6 stack; use Terra or Luna when the task does not need flagship depth.
01

Hard Coding Tasks

Use for architecture, multi-file debugging, and complex implementation.

02

Advanced Agent Tasks

Use when plans must survive several tool calls and revisions.

03

Deep Analysis

Use for decisions with conflicting evidence and important tradeoffs.

04

Escalation Tier

Route difficult requests here after a lighter model cannot finish reliably.

How to Use GPT-5.6 Sol

Test the model in three straightforward steps.
01

Choose Your Settings

Set the response controls and upload options supported by the model.

02

Send a Prompt

Describe the task, add relevant context, and review the streamed response and token usage.

03

Connect the API

Use the documented endpoint and your API key to bring the same model into your product.

Build with the GPT-5.6 Sol API

Go from an interactive test to a production integration with predictable controls and usage reporting.

Familiar Protocols

Use the API protocol configured for this model, including streaming where available.

Usage Visibility

Track input tokens, output tokens, and consumed credits after each response.

Model-Specific Controls

Pass the supported generation parameters instead of relying on generic defaults.

One Account and Balance

Test and operate supported text models through the same AIReiter account and billing system.

GPT-5.6 Sol FAQ

Common questions about the online playground, pricing, and API access.
When should I choose GPT-5.6 Sol?

Choose Sol for the hardest coding, reasoning, and agent tasks in the GPT-5.6 family.

How does Sol differ from Terra and Luna?

Sol is the flagship tier; Terra is the balanced production tier, while Luna prioritizes speed and cost.

Should all GPT-5.6 traffic use Sol?

No. Use routing and evaluations so routine requests stay on Terra or Luna.

How is GPT-5.6 Sol priced?

Current input and output token rates are displayed above the playground.

Can I call GPT-5.6 Sol through an API?

Yes. Follow the linked API documentation and use model ID gpt-5.6-sol.