OpenAI: GPT-5.6 Sol
Chat-50%openai/gpt-5.6-solGPT-5.6 Sol is the flagship model of OpenAI's GPT-5.6 series, released on 2026-07-09. It targets complex reasoning, coding, and agentic workflows, and is particularly strong at command-line work, multi-step coding tasks, and long-horizon problem solving. It supports reasoning, vision, tool use (function calling), prompt caching, and web search. Context window: 1M tokens, output: 128K, so most mid-sized repositories or large document sets can stay resident across a long session. Available via OpenAI and Anthropic protocols through Ofox.
Providers
provider.type: "azure_foundry"/v1/chat/completions/v1/responsesprovider.type: "openai"/v1/chat/completions/v1/responsesCode Examples
from openai import OpenAIclient = OpenAI(base_url="https://api.ofox.run/v1",api_key="YOUR_OFOX_API_KEY",)response = client.chat.completions.create(model="openai/gpt-5.6-sol",messages=[{"role": "user", "content": "Hello!"}],)print(response.choices[0].message.content)
Uptime & Status
Benchmarks
OpenAI: GPT-5.6 Sol scores 1485 in the Overall category of the LMArena text leaderboard (style control), ranking #10 of 374 models based on 2,821 human preference votes (updated 2026-07-12).
| Category | Arena Score | 95% CI | Rank | Votes |
|---|---|---|---|---|
| Overall | 1485 | 1473–1496 | #10 of 374 | 2,821 |
| Hard Prompts | 1505 | 1491–1519 | #10 of 374 | 1,811 |
| Coding | 1526 | 1504–1548 | #12 of 369 | 784 |
| Creative Writing | 1492 | 1465–1520 | #3 of 372 | 495 |
| Instruction Following | 1482 | 1462–1502 | #8 of 374 | 908 |
Source: LMArena · CC BY 4.0 · Updated 2026-07-12 · Methodology ↗ · Ranks compare models within each category of the LMArena text leaderboard (style control). Scores come from third-party human preference evaluations, not from OFOX.