GPT-6 Sol

POST/v1/responses

GPT-6 Sol is the middle tier of OpenAI's GPT-6 reasoning family, released in September 2026 alongside GPT-6 Luna and built, according to OpenAI, for complex coding and agentic workflows, with text and image input. It was trained with methods similar to GPT-6 Astra to bring much of Astra's capability to a faster tier. OpenAI's docs now point to GPT-6.1 Sol as the updated Sol model, so this entry mainly suits workloads already validated on GPT-6 Sol.

Request body

Parameters supported by the OpenAI Responses API. Values, defaults, and limits are read from the model registry.

stringmodelrequired

Model identifier. Set to openai/gpt-6-sol.

Default: openai/gpt-6-sol

string | array<object>inputrequired

Input text or structured content for the response.

Optional<integer>max_tokens

Maximum number of tokens the model may generate in the response.

Maximum: 128000

Optional<boolean>stream

When true, returns incremental Server-Sent Events instead of one completed response.

Default: false

Optional<array>tools

Tool definitions that the model may call during the response.

Optional<string>tool_choice

Controls whether the model may call a tool and, when supported, which tool it must call.

Optional<object>response_format

Controls the response format, including JSON mode or structured JSON output when supported.

Optional<integer>seed

Seed used to make sampling more reproducible when the provider supports it.

Optional<integer>max_completion_tokens

Request parameter supported by this model.

Maximum: 128000

Optional<string>reasoning_effort

Request parameter supported by this model.

Allowed values: low, medium, high, xhigh, max

Default: medium

Response Schema

Fields returned by the OpenAI Responses API.

stringidrequired

Unique response identifier.

stringmodelrequired

Model that generated the response.

stringobjectrequired

Response object type.

array<object>outputrequired

Generated response output items.

stringstatusrequired

Response lifecycle status.

Optional<object>usage

Token usage when available.

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: chat, vision, reasoning, structured_output, function_calling

integercontext_lengthrequired

Maximum context window accepted by this model.

Default: 1050000 tokens

stringexecution_moderequired

Execution mode declared by the model registry.

Default: sync

curl -X POST https://api.sandbase.ai/v1/responses \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "openai/gpt-6-sol",
  "input": "Describe this product in one sentence."
}'

Response200 OK

{
  "id": "resp_abc123",
  "object": "response",
  "status": "completed",
  "model": "openai/gpt-6-sol",
  "output": [
    {
      "type": "message",
      "content": [
        {
          "type": "output_text",
          "text": "A concise product description."
        }
      ]
    }
  ]
}