OpenAI: GPT-5.6 Sol is a 1,050,000-token model served on Composite at $2.50 per million tokens in and $12.5 per million tokens out. Ranked #179 of 179 models by traffic on Composite over the last 30 days, taking 0% of tokens and 0% of requests.
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Specifications
Specifications and pricing as served by Composite
Model ID
openai/gpt-5.6-sol
Provider
OpenAI
Context window
1,050,000 tokens
Accepts
file, image, text
Returns
text
Input price
$2.50 per million tokens
Output price
$12.5 per million tokens
Prompt caching
Supported — cached input is billed at the provider's cache rate, on credits and plans alike
Web search
$0.0125 per result
Thinking
Optional - see "OpenAI: GPT-5.6 Sol (Reasoning)" in the catalog to turn it on by default
Moderated
Yes - by the provider
Cost on a monthly plan
About 26 plan credits per typical call (8k in, 1k out)
Routing endpoints
2 (base plus 1 routing variant)
Use OpenAI: GPT-5.6 Sol in JanitorAI or SillyTavern
Make a Composite API key and type openai/gpt-5.6-sol as the model name. JanitorAI takes the full URL https://composite.lucidity.sh/v1/chat/completions; SillyTavern, ChubAI, Agnai and RisuAI take https://composite.lucidity.sh/v1. It runs on credits, a plan, or your own provider key.
The same model behind 1 alternative endpoint. Call the id directly to pin a route; the base id above picks for you.
Route
Model ID
Provider
Price
cheapThink
openai/gpt-5.6-sol:cheapThink
OpenAI
$2.50 per million tokens input · $12.5 per million tokens output
Pricing
$2.50 per million tokens input · $12.5 per million tokens output
Credits pay the provider’s price plus 25%; cache hits cost less.
On a monthly plan, a typical call (8k tokens in, 1k out) uses about 26 plan credits, at the provider's own price.
Provider
OpenAI
Roleplay fit
This is an OpenAI model, a dependable baseline with broad instruction-following and consistent formatting across long conversations.
Context behavior
With a 1,050,000-token context window, it can hold a long-running roleplay or a full lorebook in memory without losing earlier plot details, so it suits multi-session campaigns and character cards with heavy backstory.
Cost for regular use
It sits in the mid-range on price, a reasonable pick for regular roleplay use without going for the cheapest option available.
From the provider
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks...