OpenAI GPT 5.6 Sol: AI Large Language Models
Generate text with OpenAI's GPT 5.6 Sol flagship. Deep reasoning for math, code, and scientific research. No subscription.
Generate text with OpenAI's GPT 5.6 Sol flagship. Deep reasoning for math, code, and scientific research. No subscription.
About this model
GPT 5.6 Sol is OpenAI's flagship reasoning model in the GPT 5.6 family, optimized for complex mathematics, programming, and scientific research. It accepts mixed text and image inputs, supports a system prompt to steer behavior, and can call an integrated web search tool for real-time information. Reasoning depth is adjustable via the reasoning_effort parameter, up to 'xhigh' for the most demanding logic problems. Sol delivers the deepest reasoning in the family, sitting above the speed-optimized Luna and the balanced Terra model.
Cost analysis
| Provider | Cost | Notes |
|---|---|---|
| muapiapp | $10.00/M input, $60.00/M output | Token-based billing. Minimum $0.0008 per call. |
| OpenAI (official) | $5.00/M input, $30.00/M output | Official pricing for the flagship model. Muapiapp matches the official price without a markup on the underlying model tier. |
| Replicate | Not available | No dedicated GPT 5.6 Sol endpoint at this time. |
Token-based billing. Minimum $0.0008 per call.
Official pricing for the flagship model. Muapiapp matches the official price without a markup on the underlying model tier.
No dedicated GPT 5.6 Sol endpoint at this time.
** Competitor pricing is estimated based on similar model architectures and usage tiers.
Configuration schema
| Parameter | Type | Description | Default |
|---|---|---|---|
| Prompt | string | The user message or instruction. | Solve this complex math puzzle step by step. |
| Image URL | string | Optional image URL for multimodal requests. | undefined |
| System Prompt | string | Optional system-level instruction to guide model behavior. | You are an expert mathematician. |
| Web Search Switch | boolean | Enable web search tool for real-time information retrieval. | false |
| Reasoning Effort | Enum (4 options) | Level of reasoning depth: low, medium, high, or xhigh. | low |
The user message or instruction.
Solve this complex math puzzle step by step.Optional image URL for multimodal requests.
undefinedOptional system-level instruction to guide model behavior.
You are an expert mathematician.Enable web search tool for real-time information retrieval.
falseLevel of reasoning depth: low, medium, high, or xhigh.
lowDeveloper documentation
POST /api/v1/gpt-5-6-sol — returns request_id, poll for result via /api/v1/predictions/{id}/result.
POST /api/v1/gpt-5-6-sol/stream — returns a live Server-Sent Events stream (Content-Type: text/event-stream). Each chunk has the format data: {"choices":[{"delta":{"content":"text"}}]}, ending with data: [DONE].
curl -X POST "https://api.muapi.ai/api/v1/gpt-5-6-sol" \
-H "Authorization: Bearer $YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"prompt": "Solve this complex math puzzle step by step.",
"reasoning_effort": "xhigh"
}'
Frequently asked
Sol is the flagship reasoning model in the GPT 5.6 family, optimized for complex mathematics, programming, and scientific research where depth of reasoning matters most.
Pricing is token-based at $10.00 per million input tokens and $60.00 per million output tokens, with a minimum charge of $0.0008 per call.
Yes, Sol supports mixed text and image (image_url) inputs in a single message.
You can control the depth of reasoning by passing a reasoning_effort value of 'low', 'medium', 'high', or 'xhigh'. Sol is designed to make the most of 'high' and 'xhigh' settings on demanding problems, though this increases latency.
Use the streaming endpoint (/gpt-5-6-sol/stream) for interactive chat interfaces where the user expects real-time feedback. Use the async endpoint (/gpt-5-6-sol) for background tasks, workflows, and automated scripts.
Use Luna for high-volume, low-latency classification tasks, or Terra for balanced general business and analytical work, when Sol's deeper reasoning isn't needed and you want to reduce cost.