---
title: "gpt-5.5-pro-2026-04-23 - Model Details & Comparison"
description: "gpt-5.5-pro-2026-04-23 from OpenAI: capabilities, context limits, pricing, and side-by-side comparisons with alternative models."
url: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/openai/gpt-5.5-pro-2026-04-23"
markdown: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/openai/gpt-5.5-pro-2026-04-23.md"
---

# gpt-5.5-pro-2026-04-23 - Model Details & Comparison

> gpt-5.5-pro-2026-04-23 from OpenAI: capabilities, context limits, pricing, and side-by-side comparisons with alternative models.

## Important Links

- [View MCP Gateway](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/resources/mcp-gateway.md)
- [Features](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/#features)
- [Enterprise](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/enterprise)
- [Pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/pricing.md)
- [Docs](https://docs.getbifrost.ai)
- [GitHub](https://github.com/maximhq/bifrost)
- [Book a Demo](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/book-a-demo)

## About gpt-5.5-pro-2026-04-23

gpt-5.5-pro-2026-04-23 is a responses model from OpenAI, one of 23 responses models they offer. It is priced at $30.00 per 1M input tokens and $180.00 per 1M output tokens, ranking 49 out of 53 responses models by cost and cheaper than 4% of models in this category. gpt-5.5-pro-2026-04-23 supports vision, function calling, reasoning, web search, prompt caching — one of only 9 responses models with this combination. Its 1,050K-token context window is in the top 15% among responses models.

## Specifications

- **OpenAI Provider.**
- **Responses Mode.**
- **1,050,000 Max Input Tokens.**
- **128,000 Max Output Tokens.**
- **128,000 Max Tokens.**
- **$30.00 / 1M tokens Input Price.**
- **$180.00 / 1M tokens Output Price.**

## Capabilities

gpt-5.5-pro-2026-04-23 supports: Function Calling, Vision, Reasoning, Web Search, Prompt Caching, Parallel Function Calling, System Messages, Tool Choice, PDF Input.

## gpt-5.5-pro-2026-04-23 Pricing Overview

At $30.00 per 1M input tokens and $180.00 per 1M output tokens, gpt-5.5-pro-2026-04-23 ranks 49 out of 53 responses models by input cost. It is more expensive compared to the median of $2.75 for responses models, and is cheaper than 4% of models in this category.

gpt-5.5-pro-2026-04-23 is one of 23 OpenAI responses models, one of only 9 responses models combining function calling, prompt caching, reasoning, vision, web search. its 1,050K-token context window places it in the top 15% of responses models.

## Models to Compare

Alternatives to gpt-5.5-pro-2026-04-23 with comparable capabilities.

| Model | Provider | Input $/1M | Output $/1M |
| --- | --- | --- | --- |
| gpt-5.4-pro | Azure | $30.00 | $180.00 |
| gpt-5.4-pro-2026-03-05 | Azure | $30.00 | $180.00 |
| gpt-5.5-pro | Azure | $30.00 | $180.00 |
| gpt-5.5-pro-2026-04-23 | Azure | $30.00 | $180.00 |
| gpt-5.2-pro | Azure | $21.00 | $168.00 |

- [Compare gpt-5.4-pro](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/azure/gpt-5.4-pro.md)
- [Compare gpt-5.4-pro-2026-03-05](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/azure/gpt-5.4-pro-2026-03-05.md)
- [Compare gpt-5.5-pro](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/azure/gpt-5.5-pro.md)
- [Compare gpt-5.5-pro-2026-04-23](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/azure/gpt-5.5-pro-2026-04-23.md)
- [Compare gpt-5.2-pro](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/azure/gpt-5.2-pro.md)

## Related Resources

- [Calculate gpt-5.5-pro-2026-04-23 costs](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/openai/model/gpt-5.5-pro-2026-04-23.md)
- [Check OpenAI status](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/provider-status/openai.md)
- [All OpenAI pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/openai.md)

## FAQ

### Is gpt-5.5-pro-2026-04-23 cheaper than gpt-5.4-pro?

No. gpt-5.5-pro-2026-04-23 costs $30.00 per 1M input tokens while gpt-5.4-pro costs $30.00 per 1M input tokens, making gpt-5.4-pro 0% more affordable for input. However, gpt-5.5-pro-2026-04-23 may offer different capabilities or performance characteristics that justify the price difference.

### How does gpt-5.5-pro-2026-04-23 pricing compare to the average responses model?

gpt-5.5-pro-2026-04-23 input pricing is $30.00 per 1M tokens, which is 991% above the median of $2.75 for responses models. It ranks 49 out of 53 responses models by input cost, making it cheaper than 4% of models in this category. For output, it costs $180.00 per 1M tokens compared to the median of $16.50.

### What makes gpt-5.5-pro-2026-04-23 different from other OpenAI models?

Among OpenAI's 23 responses models, gpt-5.5-pro-2026-04-23 ranks 19 by input cost. Its combination of function calling, prompt caching, reasoning, vision, web search is shared by only 8 other responses models.

### What are the best alternatives to gpt-5.5-pro-2026-04-23?

The most comparable responses models to gpt-5.5-pro-2026-04-23 are: gpt-5.4-pro from Azure ($30.00/1M input tokens); gpt-5.4-pro-2026-03-05 from Azure ($30.00/1M input tokens); gpt-5.5-pro from Azure ($30.00/1M input tokens); gpt-5.5-pro-2026-04-23 from Azure ($30.00/1M input tokens). These alternatives were selected based on similar capabilities, pricing, and provider diversity. You can compare any of these models in detail using the Bifrost Model Library.

### How large is gpt-5.5-pro-2026-04-23's context window?

gpt-5.5-pro-2026-04-23 supports up to 1,050,000 input tokens, placing it in the top 15% of responses models by context window size (rank 8 of 65). This makes it suitable for processing long documents, extensive code repositories, or maintaining detailed conversation histories.

### How do I check if OpenAI is down?

You can monitor OpenAI service health in real time on the Bifrost OpenAI Status page. It tracks current component status, active incidents, and historical reliability data pulled from the official status page every 60 seconds.

### How do I calculate gpt-5.5-pro-2026-04-23 costs?

gpt-5.5-pro-2026-04-23 is priced based on input and output tokens. Use the interactive calculator at the top of this page to estimate costs for your specific workload. Enter your expected input and output tokens volume and the calculator will show the total cost breakdown. For reference, processing 1M input tokens costs $30.00 and generating 1M output tokens costs $180.00.

## Related Resources

- [OpenAI models](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/provider/openai.md)
- [Model library](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library.md)
- [LLM cost calculator](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator.md)
- [Docs: Bifrost docs](https://docs.getbifrost.ai)
- [GitHub: maximhq/bifrost](https://github.com/maximhq/bifrost)
- [Pricing: Bifrost pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/pricing.md)
- [Enterprise: Bifrost enterprise](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/enterprise)
- [Book a Demo: Bifrost demo](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/book-a-demo)
- [Resources: Bifrost resources](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/resources.md)

---

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