> ## Documentation Index
> Fetch the complete documentation index at: https://docs.venice.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# GPT-5.6 Sol Pro API

> GPT-5.6 Sol Pro API on Venice: 1M context, $4.00 input and $20.00 output per 1M tokens. Anonymized access without your identity.

> [accordion] Plain-text specification
>
> ## GPT-5.6 Sol Pro API
>
> GPT-5.6 Sol Pro is a large language model by OpenAI, available on the Venice API as `openai-gpt-56-sol-pro`. Requests are anonymized, so the provider never sees your identity.
>
> GPT-5.6 Sol Pro is the same underlying model as GPT-5.6 Sol, served with reasoning.mode set to pro for higher-quality responses on complex tasks.
>
> ### GPT-5.6 Sol Pro API pricing
>
> | Model ID | Variant | Privacy | Price |
> | - | - | - | - |
> | `openai-gpt-56-sol-pro` | Standard | Anonymized | $4.00 / $20.00 per 1M |
>
> ### GPT-5.6 Sol Pro specifications
>
> | Spec | Value |
> | - | - |
> | Provider | OpenAI |
> | Released | Jul 9, 2026 |
> | Privacy | Anonymized |
> | Status | Stable |
> | Context window | 1M tokens |
> | Max output | 128K tokens |
> | Reasoning effort | none, low, medium, high, xhigh, max |
>
> ### How to use the GPT-5.6 Sol Pro API
>
> Send requests to `POST https://api.venice.ai/api/v1/responses` with `"model": "openai-gpt-56-sol-pro"` and your API key.
>
> ```bash theme={"system"}
> 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-pro",
>     "input": "Explain TEE attestation in two sentences.",
>     "reasoning": { "effort": "medium" }
>   }'
> ```
>
> ### Related models
>
> * [Kimi K3 API](https://docs.venice.ai/models/kimi-k3.md): $3.75 / $18.75 per 1M
> * [Claude Opus 5.5 API](https://docs.venice.ai/models/claude-opus-5-5.md): $4.00 / $20.00 per 1M
> * [Claude Opus 5 API](https://docs.venice.ai/models/claude-opus-5.md): $5.00 / $25.00 per 1M
> * [Claude Opus 4.8 API](https://docs.venice.ai/models/claude-opus-4-8.md): $5.00 / $25.00 per 1M


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