# GPT-5 Pro

> Parallel test-time compute for the hardest answers.

- Maker: OpenAI
- Line: GPT Pro
- Canonical page: https://ai-tldr.dev/models/gpt-5-pro/
- Updated: 2026-06-18

## In short

GPT-5 Pro is OpenAI's highest-capability tier of the GPT-5 family, launched on 2025-08-07 alongside GPT-5 itself. It is a variant of GPT-5 that, in OpenAI's words, 'thinks for ever longer' by using scaled but efficient parallel test-time compute to produce the most comprehensive and accurate answers. It has a 400K-token context window and costs $15.00 per million input tokens and $120.00 per million output tokens. You can use it through OpenAI API.

## Facts

| Fact | Value | Source |
| --- | --- | --- |
| Context window | 400K (max output 128K) | [1] |
| Input price | $15.00 / 1M tokens | [2] |
| Output price | $120.00 / 1M tokens | [2] |
| Licence | Proprietary · API only | [1] |
| Released | 7 August 2025 | [3] |
| Parameters | Undisclosed | [1] |

## Sources

1. [OpenAI API pricing](https://developers.openai.com/api/docs/pricing)
2. [GPT-5 Pro API pricing guide — eesel AI](https://www.eesel.ai/blog/gpt-5-pro-in-the-api-pricing)
3. [Introducing GPT-5 — OpenAI](https://openai.com/index/introducing-gpt-5/)

## Overview

GPT-5 Pro is OpenAI's highest-capability tier of the GPT-5 family, launched on 2025-08-07 alongside GPT-5 itself. It is a variant of GPT-5 that, in OpenAI's words, 'thinks for ever longer' by using scaled but efficient parallel test-time compute to produce the most comprehensive and accurate answers. It first shipped inside ChatGPT for Pro subscribers, then became available in the API as the gpt-5-pro model on 2025-10-06.

Because GPT-5 Pro spends far more compute per query than standard GPT-5, it targets research-grade and high-stakes problems where a better answer is worth the extra latency and cost. On launch it set a new state of the art on GPQA Diamond, scoring 88.4% without tools — the best result in the GPT-5 family at the time. It accepts text and image input and returns text.

GPT-5 Pro has since been superseded by later Pro tiers (GPT-5.1 Pro, GPT-5.2 Pro, and beyond), so this original August 2025 release is now a legacy model. Its specs and benchmarks are documented here for reference.

## Benchmarks

- GPQA Diamond (no tools): 88.4% ([source](https://openai.com/index/introducing-gpt-5/))
- AIME 2025 (with Python tools): 100% ([source](https://www.vellum.ai/blog/gpt-5-benchmarks))

## Pricing

- Input: $15.00 / 1M tokens
- Output: $120.00 / 1M tokens

API price for the gpt-5-pro model (available from 2025-10-06).

Source: https://www.eesel.ai/blog/gpt-5-pro-in-the-api-pricing

## Strengths

- Highest answer quality in the original GPT-5 family via parallel test-time compute
- State-of-the-art GPQA Diamond (PhD-level science) score of 88.4% without tools at launch
- Strong competition-math performance (100% on AIME 2025 with Python tools)
- Large 400K total context window with 128K max output
- Accepts image input in addition to text

## Best for

- Research-grade science, math, and finance problems where answer quality outweighs cost
- High-stakes professional work (legal, medical, technical analysis) needing the most thorough reasoning
- Difficult coding and debugging tasks that benefit from extended deliberation
- Verifying or stress-testing answers from faster, cheaper models

## How to access

- [OpenAI API](https://developers.openai.com/api/docs/pricing) — model id `gpt-5-pro`

## GPT Pro versions

- [GPT-5.5 Pro](https://ai-tldr.dev/models/gpt-5-5-pro/) (23 April 2026)
- [GPT-5.4 Pro](https://ai-tldr.dev/models/gpt-5-4-pro/) (5 March 2026)
- [GPT-5.2 Pro](https://ai-tldr.dev/models/gpt-5-2-pro/) (11 December 2025)
- [GPT-5.1 Pro](https://ai-tldr.dev/models/gpt-5-1-pro/) (19 November 2025)
- GPT-5 Pro (7 August 2025) — this page

## FAQ

### What is GPT-5 Pro?

GPT-5 Pro is the highest-capability tier of OpenAI's GPT-5 family, released on 2025-08-07. It is a variant of GPT-5 that uses scaled, efficient parallel test-time compute to think longer and deliver the most comprehensive and accurate answers on hard problems.

### How is GPT-5 Pro different from GPT-5?

GPT-5 Pro runs the same underlying GPT-5 model but spends much more test-time compute per query, trading higher latency and cost for better answer quality. At launch it scored 88.4% on GPQA Diamond without tools, the best in the GPT-5 family.

### How much does GPT-5 Pro cost in the API?

In the OpenAI API, the gpt-5-pro model is priced at $15.00 per 1M input tokens and $120.00 per 1M output tokens — roughly 12x the output price of standard GPT-5. It became available in the API on 2025-10-06.

### Is GPT-5 Pro still the latest model?

No. GPT-5 Pro (August 2025) is a legacy model that has been superseded by later Pro tiers such as GPT-5.1 Pro, GPT-5.2 Pro, and newer releases. Check OpenAI's current model list for the most up-to-date Pro tier.

## Links

- [Introducing GPT-5 — OpenAI](https://openai.com/index/introducing-gpt-5/)
- [GPT-5 benchmarks — Vellum](https://www.vellum.ai/blog/gpt-5-benchmarks)
- [GPT-5 Pro API pricing guide — eesel AI](https://www.eesel.ai/blog/gpt-5-pro-in-the-api-pricing)
- [OpenAI API pricing](https://developers.openai.com/api/docs/pricing)
- [GPT-5 — Wikipedia](https://en.wikipedia.org/wiki/GPT-5)

Source: AI/TLDR LLM registry, https://ai-tldr.dev/models/gpt-5-pro/