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OpenAI · Language model

GPT-6.1 Sol

openai/gpt-6.1-sol
  • Language
Released Sep 29, 2026

GPT-6.1 Sol is an upgrade to GPT-6 Sol from OpenAI, positioned below the flagship GPT-6 Astra in the GPT-6 series. It is suited for agentic coding, computer use, document-heavy professional...

Specifications

Context window
1,050,000 tokens
Max output
128,000 tokens
Input
file, image, text
Output
text
Reasoning effort
max, xhigh, high, medium, low (always on)
Tokenizer
GPT
Moderation
provider-moderated

Supported parameters

Accepted by the model and forwarded as-is by the gateway.

  • max_completion_tokens
  • max_tokens
  • reasoning
  • reasoning_effort
  • response_format
  • seed
  • structured_outputs
  • tool_choice
  • tools

Use it

POST /api/v1/chat/completions · MCP chat · full reference

curl https://omnirail.org/api/v1/chat/completions \
  -H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-6.1-sol","messages":[{"role":"user","content":"Hello"}],"max_tokens":300}'