GPT-5.6 Sol Pro overview
GPT-5.6 Sol Pro by OpenAI
Same model as GPT-5.6 Sol, run with reasoning mode set to pro for harder requests. 1,050,000-token context, 128,000-token output, function calling, structured outputs.
GPT-5.6 Sol Pro specs
- Model ID
openai/gpt-5.6-sol-pro- Developer
- OpenAI
- Context window
- 1,050,000 tokens
- Max output
- 128,000 tokens
- Input
- Image, Text
- Output
- Text
- API
- OpenAI-compatible, base URL
https://api.aimlapi.com/v1
What Is GPT-5.6 Sol Pro API?
GPT-5.6 Sol Pro is the highest-capability GPT-5.6 option for difficult tasks and longer-running workflows. OpenAI says Pro and Enterprise users can select GPT-5.6 Sol Pro for the highest-quality results on complex tasks.
Technical Reference
| Developer | Open AI |
|---|---|
| Model ID | openai/gpt-5.6-sol-pro |
| Release Date | July 8, 2026 |
| Context Window | 1,050,000 tokens (~1.1M) |
| Max Output Tokens | 128,000 tokens |
| Modalities | Image, Text → Text |
| Capabilities | file input, parallel tool calls, reasoning, streaming, structured (JSON schema) output, tool/function calling, vision |
What GPT-5.6 Sol Pro Brings to the Table
Highest-capability GPT-5.6 option
OpenAI describes GPT-5.6 Sol Pro as the top GPT-5.6 choice for difficult tasks and longer-running workflows.
Pro-tier availability
OpenAI says GPT-5.6 Sol Pro powers Pro in ChatGPT.
Separate from GPT-5.6 Sol
OpenAI presents GPT-5.6 Sol Pro as a distinct option within the GPT-5.6 lineup, alongside GPT-5.6 Sol.
Optimized for complex work
OpenAI frames the model as intended for the highest-quality results on complex tasks.
Where GPT-5.6 Sol Pro Makes the Most Sense
Difficult tasks
Use GPT-5.6 Sol Pro for difficult tasks where OpenAI positions it as the highest-capability GPT-5.6 option.
Longer-running workflows
Use GPT-5.6 Sol Pro for longer-running workflows, which OpenAI explicitly calls out in its help documentation.
Complex tasks in ChatGPT
OpenAI says Pro and Enterprise users can select GPT-5.6 Sol Pro for the highest-quality results on complex tasks.
GPT-5.6 Sol Pro vs the Alternatives
GPT-5.6 Sol
OpenAI’s materials distinguish GPT-5.6 Sol from GPT-5.6 Sol Pro, with Sol Pro positioned as the highest-capability option.
Sources: https://openai.com/index/gpt-5-6/ · https://developers.openai.com/api/docs/models/gpt-5.6-sol · https://help.openai.com/en/articles/20001325
Use cases
Difficult tasks and longer-running workflows are the documented fit for GPT-5.6 Sol Pro.
It is suited to coding work, including secure code review, patching, debugging, and high-value coding or review tasks.
It is also suited to cybersecurity work, including threat modeling, blue teaming, vulnerability research, exploitation, and defensive testing.
It is documented for knowledge work and research, including complex professional analysis and research synthesis.
Capabilities
- File input
- Reasoning
- Streaming
- Vision
GPT-5.6 Sol Pro API pricing
| Usage | Price | Unit |
|---|---|---|
| Input | $4.23 | 1M tokens |
| Output | $21.16 | 1M tokens |
| Cached input | $0.4232 | 1M tokens |
Prices from the AI/ML API price list, checked on Nov 4, 2026.
GPT-5.6 Sol Pro vs other models: token prices
AI/ML API input and output rates for 5 models, per million tokens.
| Model | Input | Output |
|---|---|---|
 GPT-5.6 Sol Pro | $4.23 | $21.16 |
| GPT-6 Luna | $0.1 | $0.5 |
| GPT-6.1 Terra | $1 | $5 |
| GPT-6.1 Sol | $2 | $10 |
| GPT-6.1 Terra Pro | $2.12 | $10.58 |
How to use the GPT-5.6 Sol Pro API
View docs
Build with your agent
Give your agent the model details, code and documentation.
1Get your API key
Create API keyexport AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"2Make your first request
curl 'https://api.aimlapi.com/v1/chat/completions' \
-H "Authorization: Bearer $AIMLAPI_KEY" \
-H 'Content-Type: application/json' \
-d '{
"model": "openai/gpt-5.6-sol-pro",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}'import os
import requests
headers = {
"Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
"Content-Type": "application/json",
}
payload = {
"model": "openai/gpt-5.6-sol-pro",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}
response = requests.post("https://api.aimlapi.com/v1/chat/completions", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())const response = await fetch("https://api.aimlapi.com/v1/chat/completions", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
"model": "openai/gpt-5.6-sol-pro",
"messages": [
{
"role": "user",
"content": "Write a haiku about the ocean."
}
]
}),
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());Models similar to GPT-5.6 Sol Pro
GPT-5.6 Sol Pro FAQ
What is the context window of GPT-5.6 Sol Pro?
GPT-5.6 Sol Pro has a 1,050,000 tokens context window and can return up to 128,000 tokens.
What inputs and outputs does GPT-5.6 Sol Pro support?
GPT-5.6 Sol Pro takes image, text as input and returns text.
What is the model ID for GPT-5.6 Sol Pro?
Use openai/gpt-5.6-sol-pro as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.
When was GPT-5.6 Sol Pro released?
GPT-5.6 Sol Pro became available on July 9, 2026.
How much does GPT-5.6 Sol Pro cost?
GPT-5.6 Sol Pro costs $4.23 input and $21.16 output per 1M tokens on AI/ML API, billed as you go with no subscription.
Does GPT-5.6 Sol Pro support streaming?
Yes, GPT-5.6 Sol Pro can stream responses as they are generated.
Can GPT-5.6 Sol Pro read images?
Yes, GPT-5.6 Sol Pro accepts image input alongside text.
Who created GPT-5.6 Sol Pro?
GPT-5.6 Sol Pro was built by OpenAI.
What kinds of tasks can GPT-5.6 Sol Pro handle?
It supports reasoning, vision, file input, tool use, parallel tool calls, and structured output, making it suited for complex text and image-based tasks requiring tool integration.