> ## 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-5.5 Pro API

> GPT-5.5 Pro API on Venice: 1M context, $30.00 input and $180 output per 1M tokens. Anonymized access without your identity. Pricing, specs and code examples.

> [accordion] Plain-text specification
>
> ## GPT-5.5 Pro API
>
> GPT-5.5 Pro is a large language model by OpenAI, available on the Venice API as `openai-gpt-55-pro`. Requests are anonymized, so the provider never sees your identity.
>
> GPT-5.5 Pro, the successor to GPT-5.4 Pro, builds on GPT-5.5's unified architecture with enhanced reasoning for complex, high-stakes tasks. It provides a 1M+ token context window (922K input, 128K output) and supports text and image inputs.
>
> ### GPT-5.5 Pro API pricing
>
> | Model ID | Variant | Privacy | Price |
> | - | - | - | - |
> | `openai-gpt-55-pro` | Standard | Anonymized | $30.00 / $180 per 1M |
>
> ### GPT-5.5 Pro specifications
>
> | Spec | Value |
> | - | - |
> | Provider | OpenAI |
> | Released | Apr 24, 2026 |
> | Privacy | Anonymized |
> | Status | Stable |
> | Context window | 1M tokens |
> | Max output | 128K tokens |
> | Reasoning effort | medium, high, xhigh |
>
> ### How to use the GPT-5.5 Pro API
>
> Send requests to `POST https://api.venice.ai/api/v1/responses` with `"model": "openai-gpt-55-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-55-pro",
>     "input": "Explain TEE attestation in two sentences.",
>     "reasoning": { "effort": "medium" }
>   }'
> ```
>
> ### Related models
>
> * [GPT-5.4 Pro API](https://docs.venice.ai/models/gpt-5-4-pro.md): $30.00 / $180 per 1M
> * [Claude Fable 5 API](https://docs.venice.ai/models/claude-fable-5.md): $10.00 / $50.00 per 1M
> * [Claude Fable 5.1 API](https://docs.venice.ai/models/claude-fable-5-1.md): $10.00 / $50.00 per 1M
> * [GPT-6.1 Sol Ultrafast API](https://docs.venice.ai/models/gpt-6-1-sol-ultrafast.md): $12.00 / $60.00 per 1M


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