Flagship reasoning model for complex programming and professional analysis
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series, focused on complex tasks that require sustained planning, iterative checking, and tool collaboration. It has clear strengths in programming, professional knowledge work, scientific analysis, and defensive security, and can also combine image understanding with interfaces and materials, making it suitable for advancing complex requirements into reviewable code, analysis results, and deliverables.
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["ACEDATACLOUD_API_KEY"],
base_url="https://api.acedata.cloud/v1",
)
response = client.responses.create(
model="gpt-5.6-sol",
input="Hello!",
)
print(response.output_text)
Choose an available protocol for this model. OpenAI SDK uses a Base URL ending in /v1; Anthropic SDK uses the root URL. See each guide for protocol-specific parameters, tools and response formats.
Specifications and interface features
Clarify capacity, input and output, and calling methods before selecting a model.
Model positioning
GPT-5.6 series flagship; call ID: gpt-5.6-sol
Input methods
Text, images; Chat Completions image messages use image_url
Output methods
Text responses; the interface provides JSON format and function tool calling configuration
Native reasoning control
max provides more reasoning time than xhigh
Development endpoints
Responses, Chat Completions
Response control
Development endpoints provide streaming responses and output token budget configuration
Native context window
1,050,000 tokens
Native maximum input
922,000 tokens; must be planned together with output
Native maximum output
128,000 tokens
Native reasoning and agent capabilities describe how the model works; this platform's input organization, output format, and tool configuration are used according to the selected calling endpoint.
Core Capabilities
Learn what gpt-5.6-sol can bring to your work.
Keep complex engineering moving forward
Sol’s programming strengths go beyond code completion to handling engineering tasks that require planning, iteration, and tool coordination. It is suited to analyzing cross-file dependencies, identifying the causes of failures, and proposing modifications. When combined with testing tools, it can repeatedly check against acceptance criteria to produce code changes, issue explanations, and validation steps rather than just isolated snippets.
Turn materials into usable deliverables
When faced with disorganized business materials, Sol can organize arguments, clarify constraints, and help create documents, presentation content, and spreadsheet analyses. Its design judgment and ability to follow reference formats are well suited to templated deliverables: it considers both whether content is complete and whether layout and hierarchy are effective. Creating, rendering, and saving final files requires the appropriate tools.
Integrate visual understanding into analysis
Sol can combine text and images for analysis, helping to interpret interface screenshots, charts, or reference layouts. When submitting images, also describing the areas to inspect and the evaluation criteria helps produce more focused explanations. Visual findings can then be turned into revision suggestions or code approaches, but understanding images does not mean directly generating or editing them.
Use Cases
Start with specific tasks to find where the model can be effective.
Cross-file refactoring and code review
Provide relevant code, change diffs, error logs, and testing requirements, and have Sol first identify the scope of impact before proposing an order for modifications. Deliverables can include a list of blocking issues, patch drafts, and regression testing recommendations. When actual execution is needed, the application runs tests and returns the results, giving subsequent revisions real feedback rather than relying only on static judgment.
Professional reports and reference layout reuse
Provide organized source text, key data, and images of reference pages, and have Sol produce report structures, supporting arguments for conclusions, presentation slide content, or spreadsheet calculation approaches. This is suitable for research, financial, and business analysis tasks that require consistent narratives and formatting; prompts should clearly specify which content must be retained and which inferences require their basis to be listed separately.
Defensive security and scientific analysis
Within authorized scope, provide code, system constraints, and known issues, and have Sol assist with security reviews, threat modeling, and patch checks; it can also design analysis steps based on research questions and organized data. Deliverables should include assumptions, validation methods, and items requiring confirmation, making them easier for engineers or researchers to review and avoiding treating model judgments as validation results.
How to choose this model
Choose based on task complexity, input materials, and expected results.
Choose Sol for difficult tasks; choose among tiers for everyday tasks
Sol, Terra, and Luna are different capability tiers from the same generation, not different spellings of one model. Sol is better suited to multi-step engineering, specialized analysis, or tasks that are difficult to complete in one pass; for everyday work, consider the balanced Terra, while for large volumes of lightweight tasks, consider Luna, which emphasizes speed and cost efficiency. When choosing, prioritize the quality of actual task completion rather than looking only at response length.
Compared with GPT-5.5, focus on workflow improvements
Compared with GPT-5.5, the public improvements of GPT-5.6 Sol focus on complex programming, scientific work, visual design judgment, and adherence to reference formats. Existing GPT-5.5 applications can use representative tasks to compare modification accuracy, template consistency, and review quality before deciding whether to migrate. max is suitable for problems worth deep reasoning; Ultra is a separately configured multi-agent way of working.
Start with a specific task
Based on the characteristics of gpt-5.6-sol, first validate small tasks whose results can be checked.
01
Planning and review for complex specialized workflows
You can ask directly: Break this cross-module engineering task into verifiable steps, check the inputs, tool results, and completion criteria for each step, and finally organize the evidence and unresolved issues.
02
Prepare inputs that support judgment
Provide key context and real feedback; record tool execution and model planning separately, and do not enable multi-agent workflows by default.
03
Then integrate it into your workflow
Use the full model ID gpt-5.6-sol, first confirm the public request format and available parameters on the API page, then connect your application. Retain result parsing, exception handling, and relevant evidence, and use the same set of real samples to evaluate whether it is suitable for continued use.
Usage Boundaries
Before formal use, understand output quality and capability scope.
Sol can plan tool use, but ordinary text requests do not automatically receive permission to operate terminals, browsers, or desktops. Function calls return the intended call and parameters; the application remains responsible for execution, permission control, and returning results. Whether code can run or patches are effective should be determined through actual testing.
max provides more room for reasoning, but does not guarantee correctness; Ultra is also not a mode automatically enabled by entering a base model ID. Complex tasks should specify stage goals, output budgets, and acceptance criteria, retain review steps, and avoid equating more reasoning directly with more reliable conclusions.
Sol applies strong safeguards to high-risk cybersecurity requests, and some requests may be restricted. Defensive tasks should specify the authorized environment, analysis target, and remediation goal; security and scientific analysis conclusions still require professional validation and cannot be used to claim that a reliable end-to-end attack or experiment has been completed.
Frequently Asked Questions
Answers to common questions about using gpt-5.6-sol.
What is the difference between GPT-5.6 Sol, Terra, and Luna?
Sol is the flagship tier, designed primarily for complex reasoning and demanding work; Terra emphasizes balance for everyday work, while Luna emphasizes speed and cost efficiency. For engineering or professional analysis that requires continuous checking, Sol may be the preferred choice; for tasks such as simple classification and summarization, evaluate the other tiers first.
Can GPT-5.6 Sol see images and create images?
It can understand images together with text, for example by checking interface screenshots or explaining charts. Chat Completions can organize image messages through image_url and include specific questions. This is a visual analysis workflow and should not be treated as native image generation or image editing capability.
Are max and Ultra the same feature?
No. max allows the model to spend more time reasoning deeply, making it suitable for complex analysis and repeated checking; Ultra advances tasks through parallel collaboration among multiple agents. Basic gpt-5.6-sol requests do not automatically enable Ultra, and setting a higher reasoning level does not mean creating a multi-agent workflow.
Which endpoint should I choose to call Sol?
Use Chat Completions or Responses and provide the full model ID. Chat Completions uses messages and choices, while Responses uses input and its corresponding response structure; manage history, streaming events, and tool parameters separately according to the selected interface, and do not mix the two formats.
Will Sol automatically run code and generate office files?
It can generate code, plan checking steps, and organize document or presentation content, but running code, rendering pages, and saving office files require an appropriate tool environment. When using it, return tool results to the model and set testing or delivery acceptance criteria, distinguishing content generation from actual execution completion.