gpt-5-6-solGPT-5.6 Sol is the frontier model in the GPT-5.6 family — OpenAI's highest-intelligence tier. The gpt-5.6 alias routes to Sol, and it roughly corresponds to the unsuffixed top model tier of earlier GPT-5 families. It supports reasoning tokens, text + image input and text output, a 1,050,000-token context window, 128,000 max output tokens, and a Feb 16 2026 knowledge cutoff. Coming soon on API Models: one API key for every model, priced below official, reachable from China with no organization verification, and only successful requests billed.
The highest-intelligence GPT-5.6 model — the gpt-5.6 alias routes here
Reasoning-token support for hard, multi-step problems
Text + image input, text output; 1.05M-token context, 128K max output
Launching on API Models — one key, cheaper than official, China-reachable
This model is not callable yet. When it launches you can call it through our unified OpenAI-compatible API — one key for every model, priced below official, reachable from China. See the overview and FAQ below in the meantime.
View LLM API docsGPT-5.6 Sol is a Large Language Model API provided by OpenAI. GPT-5.6 Sol is the frontier model in the GPT-5.6 family — OpenAI's highest-intelligence tier. The gpt-5.6 alias routes to Sol, and it roughly corresponds to the unsuffixed top model tier of earlier GPT-5 families. It supports reasoning tokens, text + image input and text output, a 1,050,000-token context window, 128,000 max output tokens, and a Feb 16 2026 knowledge cutoff. Coming soon on API Models: one API key for every model, priced below official, reachable from China with no organization verification, and only successful requests billed. Through API Models platform, you can access this model via a unified API with transparent pay-as-you-go pricing. Current pricing: Input: TBA, Output: TBA per 1M tokens.
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GPT-5.6 Sol is available through API Models at: Input: TBA, Output: TBA per 1M tokens. Billing is pay-as-you-go — you only pay for what you generate.
Sign up at API Models, get your API key, and call our unified API endpoint. We provide detailed API documentation with code examples in cURL, Python, and Node.js.
API Models offers the same GPT-5.6 Sol model through our aggregation platform. We provide a unified API interface so you do not need separate accounts for each provider - one API key to access all models.
GPT-5.6 Sol is the frontier, highest-intelligence model in OpenAI's GPT-5.6 family, roughly the unsuffixed top tier of earlier GPT-5 families; the gpt-5.6 alias routes to Sol. It supports reasoning tokens, text + image input and text output, a 1,050,000-token context window, 128,000 max output tokens, and a Feb 2026 knowledge cutoff.
Coming soon (preview). At launch it will be callable via the OpenAI-compatible /v1/chat/completions endpoint with one API key for every model (GPT-5.6, Claude, Gemini, …), priced below official, reachable from China with no organization verification. Watch this page for the launch date.
Sol is the frontier (top intelligence); Terra balances intelligence and cost (mini tier, official $2.5/$15); Luna targets cost-sensitive, high-volume workloads (nano tier, official $1/$6). All three share one OpenAI-compatible endpoint — switch by changing a single model name.
On API Models, GPT-5.6 Sol runs alongside 60+ models on one API key and one balance, so choosing is about fit, not lock-in. It supports Frontier / Flagship, Reasoning Tokens, Text + Image In, 1.05M Context, and you can weigh it on price and capability against other Large Language Model models, then switch by changing a single model-name string — no new account or integration. Browse every Large Language Model option with live pricing at apimodels.app/models.
GPT-5.6 Sol supports: Frontier / Flagship, Reasoning Tokens, Text + Image In, 1.05M Context. See the API Models docs for full parameters and call examples.
Yes. API Models exposes GPT-5.6 Sol through a single unified API and one key — no separate provider accounts, and no need to handle each provider's regional network access yourself.
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