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LLMS • CURATED • UPDATED JUL 9, 2026

GPT-5.6 Sol

OpenAI's top-tier model for complex professional work

GPT-5.6 Sol is the highest-capability model in OpenAI's GPT-5.6 family, released July 9, 2026 after a limited preview starting June 26. It has a 1.05M-token context window with up to 128K output tokens, and is positioned for complex professional work: advanced coding, scientific and technical reasoning, long-document analysis, computer use, and multistep agent workflows. It sits alongside the cheaper Terra and Luna tiers in the same family.

QUICK FACTS

Pricing Paid
Platforms web, api
API No
Open Source No
Modalities LLMs, IDEs & Coding Tools
Best For Best for Professional-Grade Reasoning
Date Added 2026-07-09

QUICK TIPS

1 Route routine tasks to Terra or Luna and reserve Sol for genuinely hard problems
2 Watch the 272K-token threshold — pricing jumps significantly above it
3 Use the full 1.05M context window for whole-codebase or whole-document analysis
4 Take advantage of computer-use support for browser/desktop automation tasks
5 Structure multistep agent workflows to checkpoint progress given the task complexity it's built for

SIMILAR TOOLS

Claude Opus 4.6 Google Antigravity 2.0 NotebookLM Cursor 2.0 OpenAI Codex

USE CASE EXAMPLES

Whole-Codebase Technical Analysis

Analyze and refactor a large codebase using the full context window.

STEPS:
  1. Load the relevant codebase into context
  2. Ask for an architecture-level review
  3. Request specific refactor recommendations
  4. Review and approve changes incrementally
  5. Run tests and iterate on failures

Multistep Research Agent

Run a long, multi-tool research and synthesis workflow.

STEPS:
  1. Define the research question and constraints
  2. Let Sol plan a multistep approach
  3. Execute tool calls for retrieval and analysis
  4. Synthesize findings into a structured report
  5. Verify key claims before finalizing

PRICING

Paid

Requires a paid subscription.

📚

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EXPLORE ALTERNATIVES

View GPT-5.6 Sol Alternatives (2026) →

Compare GPT-5.6 Sol with 5+ similar llms AI tools.

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FREQUENTLY ASKED QUESTIONS

Q

Is GPT-5.6 Sol free?

A

No, GPT-5.6 Sol requires a paid subscription.

Q

Does GPT-5.6 Sol have an API?

A

No, GPT-5.6 Sol does not appear to offer a public API.

Q

What is GPT-5.6 Sol best for?

A

GPT-5.6 Sol is best for Best for Professional-Grade Reasoning.

Q

What platforms does GPT-5.6 Sol support?

A

GPT-5.6 Sol supports web, api.

Q

Is GPT-5.6 Sol open source?

A

No, GPT-5.6 Sol is not open source.

Q

What can I do with GPT-5.6 Sol?

A

GPT-5.6 Sol is designed for Advanced coding and technical reasoning, Long-document analysis, Multistep agent workflows. GPT-5. Key strengths include #2 overall on the Artificial Analysis Intelligence Index (58.9%) and 1.05M-token context window with a 128K output ceiling.

Q

How do I use GPT-5.6 Sol?

A

GPT-5.6 Sol is a large language model for text generation, analysis, and conversation. Access through the web interface. Enter prompts or questions to get responses. It excels at #2 overall on the artificial analysis intelligence index (58.9%).