GPT-5.6 Sol is an OpenAI model for professional reasoning and coding, with image input, configurable reasoning effort, and a 1.05M-token context window.
Tool support requires the appropriate API integration; a supported tool is not automatically active in every chat.
Supported API features and tools
Streaming responses and prompt caching
Function calling and structured outputs
Web search and file search
Code interpreter and hosted shell
Computer use and image generation tools
MCP, tool search, skills, and apply patch
Before you choose
No native audio or video support.
Image generation requires a tool; native output is text.
Fine-tuning is not supported.
Choose the reasoning effort
nonelowmedium · defaulthighxhighmax
Start with medium and test against examples with known answers. Compare none or low for narrowly defined work; evaluate higher settings when errors would be costly. Track response time and token use alongside correctness. If moving from GPT-5.5 or GPT-5.4, compare your existing effort setting with one level lower rather than assuming more reasoning is always better.
Unsupported settings: minimal.
The gpt-5.6 alias routes to gpt-5.6-sol. Use the explicit model ID when documenting an integration.
Use the Responses API for built-in tools and multi-turn reasoning workflows. Chat Completions and Batch are also supported.
API rate limits vary by usage tier; free-tier API access is not supported.
Put it to work
Start with a more useful prompt.
Original examples from EZ Ai Assist. Adapt these to your task and the features available in your workspace.
Workflow 01
Review a multi-file change
Provide the diff, related interfaces, and expected behavior so the review can follow dependencies.
Review the supplied changes across these files against the requirements below. Trace the affected data flow and identify concrete regressions, missing validation, or incompatible assumptions between components. For each finding, cite the file and relevant code, explain the user impact, and suggest the smallest correction. Separate confirmed findings from questions that require more context. Finish with focused regression tests. Review only; do not edit files or deploy.
Workflow 02
Create an evidence-backed brief
Turn a labeled source pack into a decision document with traceable claims and explicit gaps.
Read the labeled documents below and prepare a decision brief for the stated business question. Begin with the decision, then compare the options against our constraints and success criteria. Cite the source and section supporting each material claim. Separate evidence, inference, and unanswered questions; flag conflicting figures instead of averaging them without explanation. End with a recommendation, its strongest counterargument, and the next piece of evidence we should collect. Use only the supplied material.
Workflow 03
Prioritize interface improvements
Supply a screenshot and the intended user task; keep visual findings separate from behavior that needs testing.
Evaluate this interface screenshot for the user task described below. Identify the three changes most likely to improve clarity, visual hierarchy, or completion of that task. For each change, describe the visible evidence, the smallest design adjustment, and a practical verification step. Preserve the existing brand, colors, and layout unless they directly cause the issue. Do not claim that contrast, keyboard access, or mobile behavior has passed testing from a screenshot alone. List what requires inspection in the working interface.
Developer reference
OpenAI API pricing
These are OpenAI API reference prices, not EZ Ai Assist subscription prices.
OpenAI lists these promotional rates as available at least through November 21, 2026. Recheck its pricing page before estimating future API spend.
Above 272,000 input tokens, long-context rates apply to the entire request, not only the tokens above the threshold.
Cache writes cost 1.25× uncached input; cached reads use the separate discounted rate shown above.
The table covers Standard processing. Other service tiers, regional processing, and tool usage can change the final bill; check the applicable OpenAI rates.
Common questions
A few things worth knowing.
Is GPT-5.6 the same API model as GPT-5.6 Sol?
OpenAI documents gpt-5.6 as an alias that routes to gpt-5.6-sol. Use the explicit ID when recording a test or integration so your configuration is easy to identify. Do not treat similarly named Sol models from other generations as interchangeable.
How should I choose the reasoning effort?
Use a small set of representative tasks with known answers or a clear review rubric. Compare the documented medium default with a lower setting for speed and a higher setting for difficult dependencies. Record correctness, latency, and token use. A more expensive response is not automatically a more useful one, and the app may expose a different set of controls.
Can I use a screenshot as part of a task?
Yes, image input is supported. Include the screenshot together with the user goal, relevant text, and constraints. Ask the model to distinguish visible evidence from assumptions. Use a browser or other appropriate test tool to verify proposed improvements rather than treating a visual review as a functional or accessibility audit.
How can I get useful results from long documents?
Label the documents, state the decision you need to make, and prioritize relevant passages. Ask for citations you can verify and for missing or conflicting evidence to be called out. Reserve room for the response and keep the requested output focused. A large context window does not guarantee complete recall or correct conclusions.
What does Pro mode mean for GPT-5.6 Sol?
In the Responses API, reasoning.mode set to pro asks the same model to do additional work; it is not a separate Pro model ID. Reasoning effort is configured independently. Evaluate the quality, latency, and token-use tradeoff for your task. This API setting is separate from EZ Ai Assist Pro subscription tiers and is not a promise that the app exposes Pro mode.
Are search and other tools automatically available in every chat?
No. The integration must enable the supported tools, supply the necessary data, and handle their results. Ask what tools are available before requesting a tool-dependent workflow. Keep permissions explicit, review important actions, and do not interpret a suggested tool call as proof that it actually ran.
Are these API rates what I pay for EZ Ai Assist?
No. The table is a reference for direct OpenAI API usage, not a subscription price or a per-message quote. Your EZ Ai Assist plan and available features are separate. Consult our pricing page for subscriptions and OpenAI’s current documentation when budgeting direct API usage.
Check the source
Official documentation
Specifications and API prices checked on . Example prompts and workflow advice are editorial guidance from EZ Ai Assist.