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GPT 5.6 Sol

GPT 5.6 Sol is the flagship of the GPT-5.6 family and the most capable of the three GPT-5.6 models on AI Gateway, with stronger agentic work across coding, biology, and cybersecurity than the previous generation, better token efficiency, and a context window of 1.1M tokens. Your use is subject to OpenAI's Terms & Privacy Policies.

ReasoningTool UseImplicit CachingFile InputVision (Image)Web SearchWebsockets
Use with AI GatewayView docs
import { streamText } from 'ai'


const result = streamText({
  model: 'openai/gpt-5.6-sol',
  prompt: 'Why is the sky blue?'
})
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Frequently Asked Questions

  • What is GPT 5.6 Sol built for?

    Complex professional work. OpenAI positions GPT 5.6 Sol as the frontier model of the GPT-5.6 family, with agentic gains over the previous generation in coding, biology, and cybersecurity.

  • How does GPT 5.6 Sol compare with GPT-5.6 Terra and GPT-5.6 Luna?

    GPT 5.6 Sol is the most capable of the three. GPT-5.6 Terra balances intelligence against cost for everyday work, and GPT-5.6 Luna handles fast, cost-sensitive traffic at the lowest price in the family.

  • What context window and output limit does GPT 5.6 Sol support?

    1.1M tokens, with up to 272K tokens of output per request. That covers full repositories, long document sets, and extended agent histories in a single call.

  • What inputs does GPT 5.6 Sol accept?

    Text and images, with text output. Audio and video input are not supported, so route voice work to the gpt-realtime family instead.

  • Which APIs can I use to call GPT 5.6 Sol?

    Set the model to openai/gpt-5.6-sol in the AI SDK, the Chat Completions API, the Responses API, or another supported API format. AI Gateway accepts each format and routes the request.

  • Can I move existing traffic to GPT 5.6 Sol without changing my code?

    Yes. Add an AI Gateway routing rule that rewrites your current model slug to openai/gpt-5.6-sol. Requests keep their existing code path and land on GPT 5.6 Sol.

  • What does GPT 5.6 Sol cost?

    List pricing is $5 per million input tokens and $30 per million output tokens, with cached input at $0.5. Short-context and long-context requests are priced separately, and AI Gateway mirrors provider pricing with no markup.

  • Does GPT 5.6 Sol support zero data retention through AI Gateway?

    Yes, Zero Data Retention is available for this model. Zero Data Retention is offered on a per-provider basis. See https://vercel.com/docs/ai-gateway/capabilities/zdr for details.

  • What are typical latency characteristics?

    This page shows live throughput and time-to-first-token metrics measured across real AI Gateway traffic. GPT 5.6 Sol also offers a fast mode for quicker responses from the same model.