# GPT-5.6 Sol

> OpenAI's flagship model for complex professional work, with a 1.05M-token context window and tool calling.

## Key facts

- Model author: OpenAI
- Input: $4.6056 per 1M tokens (starting tier)
- Output: $27.6332 per 1M tokens (starting tier)
- Cached input: $0.4606 per 1M tokens
- Context window: 1,050,000 tokens
- Maximum output: 128,000 tokens
- Input modalities: image, text
- Output modalities: text
- Capabilities: apply_patch, code_interpreter, computer_use, file_search, hosted_shell, image_generation, reasoning, structured_output, tools, vision, web_search
- Released: 2026-07-09
- Knowledge cutoff: Feb 16, 2026
- Model IDs: `jd/gpt-5.6-sol`, `openai/gpt-5.6-sol`
- Model page: https://www.realrelay.ai/model/openai/gpt-5.6-sol

## Overview

GPT-5.6 Sol is a flagship reasoning model from OpenAI for complex professional work. It accepts text and image input, returns text, and supports tool calling, structured output, web search and computer use, with a 1.05M-token context window and up to 128,000 output tokens.

It has a 1.05M-token context window and can generate up to 128,000 output tokens. It accepts text and image input and returns text. Its knowledge cutoff is February 16, 2026, and it was released on July 9, 2026.

## Capabilities

GPT-5.6 Sol supports reasoning, tool calling, structured output and image input, and returns text output. Its listed tools also include web search, file search, a code interpreter, computer use, image generation, patch-based code editing and a hosted shell.

OpenAI documents GPT-5.6 Sol as a flagship model for complex professional work, and its large context window and output limit let it handle long, multi-step tasks in a single request.

## Pricing

GPT-5.6 Sol costs from $4.61 per 1M input tokens and from $27.63 per 1M output tokens. Cached input reads cost from $0.46 per 1M tokens. Pricing is tiered, and the prices shown are the starting tier. GPT-5.6 Sol is available through RealRelay's OpenAI-compatible API.

## Use cases

Use GPT-5.6 Sol for agentic coding on large repositories and other complex professional work: the 1.05M-token window holds code and history, and tool calling edits and tests it.

It can also review long contracts or reports together with screenshots, and return structured output that downstream systems can parse. The 128,000-token output limit leaves room for long reports and large code changes in one response.

## Call it

OpenAI-compatible chat completions:

```bash
curl https://www.realrelay.ai/v1/chat/completions \
  -H "Authorization: Bearer $REALRELAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "openai/gpt-5.6-sol", "messages": [{"role": "user", "content": "Hello"}]}'
```

## FAQ

### What is GPT-5.6 Sol?

GPT-5.6 Sol is a flagship reasoning model from OpenAI for complex professional work.

### How much does GPT-5.6 Sol cost?

GPT-5.6 Sol costs from $4.61 per 1M input tokens and from $27.63 per 1M output tokens. Cached input reads cost from $0.46 per 1M tokens. Pricing is tiered, and the prices shown are the starting tier.

### What is the context window of GPT-5.6 Sol?

GPT-5.6 Sol has a 1.05M-token context window and can generate up to 128,000 output tokens.

### What inputs and outputs does GPT-5.6 Sol support?

GPT-5.6 Sol accepts text and image input and returns text.

### Does GPT-5.6 Sol support tool calling?

Yes. GPT-5.6 Sol supports tool calling, along with reasoning, structured output and image input.

### When was GPT-5.6 Sol released?

GPT-5.6 Sol was released on July 9, 2026. Its knowledge cutoff is February 16, 2026.

### How do I call GPT-5.6 Sol via the API?

Call GPT-5.6 Sol through RealRelay's OpenAI-compatible API by setting the model name to openai/gpt-5.6-sol.