GPT-5.6 Sol API

GPT-5.6 Sol is a large language model by OpenAI, available on the Venice API as openai-gpt-56-sol. Requests are anonymized, so the provider never sees your identity.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 and long-horizon problem solving.

GPT-5.6 Sol API pricing

Model ID	Variant	Privacy	Price
`openai-gpt-56-sol`	Standard	Anonymized	$5.00 input /$ 25.00 output per 1M tokens

GPT-5.6 Sol specifications

Spec	Value
Provider	OpenAI
Released	Jul 9, 2026
Privacy	Anonymized
Context window	1M tokens
Max output	125K tokens
Reasoning effort	none, low, medium, high, xhigh, max

How to use the GPT-5.6 Sol API

Send requests to POST https://api.venice.ai/api/v1/responses with "model": "openai-gpt-56-sol" and your API key.

curl https://api.venice.ai/api/v1/responses \
  -H "Authorization: Bearer $VENICE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai-gpt-56-sol",
    "input": "Explain TEE attestation in two sentences.",
    "reasoning": { "effort": "high" }
  }'

GPT-5.6 Sol API FAQ

How much does the GPT-5.6 Sol API cost?

5.00 per 1M input tokens and

25.00 per 1M output tokens, with cached input at $0.50 per 1M. Prices are in USD and can be paid in DIEM at parity.

What is the GPT-5.6 Sol model ID?

Use openai-gpt-56-sol as the model parameter.

Is the GPT-5.6 Sol API private?

GPT-5.6 Sol is anonymized: Venice forwards requests to the provider without your identity, but the provider may retain prompt data, so use a private model for sensitive work.

What is the context window of GPT-5.6 Sol?

1M tokens of context, with up to 125K output tokens per response.

What does GPT-5.6 Sol support?

GPT-5.6 Sol supports function calling, structured outputs, reasoning, image input, web search and prompt caching. Reasoning effort is adjustable with reasoning_effort: none, low, medium, high, xhigh and max (default high).

Which endpoint does the GPT-5.6 Sol API use?

Call POST /responses. /chat/completions is also supported. OpenAI reasoning models are designed around the Responses API: reasoning, tool calls and messages come back as typed output items. Venice’s /responses endpoint is in alpha.

Related models

GPT-6 Sol API: $2.50 input /$ 12.50 output per 1M tokens
Claude Opus 5.5 API: $4.80 input /$ 24.00 output per 1M tokens
Claude Opus 5 API: $6.00 input /$ 30.00 output per 1M tokens
Claude Opus 4.8 API: $6.00 input /$ 30.00 output per 1M tokens
Kimi K3 API: $3.75 input /$ 18.75 output per 1M tokens

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