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OpenAI Responses

gpt-5-pro

GPT-5 Pro is OpenAI’s extended-reasoning tier of GPT-5, built to push reliability on hard problems, long tool chains, and agentic workflows. It keeps GPT-5’s multimodal skills and very large context (API page lists up to 400K tokens) while allocating more compute to think longer and plan better, improving code generation, math, and complex writing beyond standard GPT-5/“Thinking.” OpenAI positions Pro as the version that “uses extended reasoning for even more comprehensive and accurate answers,” targeting high-stakes tasks and enterprise use.

👁Vision🧠Reasoning🔧Tool calling
Try gpt-5-proCompareDocs

Specifications

Context window400K tokens
Max output272K tokens
API typechat
AddedOct 6, 2025
Model IDopenai-responses/gpt-5-pro
Data retentionYes (30 days)
Used for trainingNo
Provider location🇺🇸 US
Privacy policyOpenAI Privacy Policy→

Benchmarks

Benchmarks haven't been published yet for this exact variant.

Some variants (region-specific deployments, highspeed tiers) share benchmarks with their base model — check the base model page or the OpenAI Responses models overview.

Pricing

Input / 1M
$15.00
Output / 1M
$120.00
Cache write
—
Cache read
—
Estimated cost
100K input + 10K output$2.70
1M input + 100K output$27.00
10M input + 1M output$270.00

Requesty charges exactly what the upstream provider charges — no markup, no per-request fees. Prompt caching and smart routing can reduce effective cost by 30-80%.

Quickstart

Drop-in compatible with the OpenAI SDK. Change the base URL, swap in your Requesty API key, and set the model to openai-responses/gpt-5-pro.

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from openai import OpenAI

client = OpenAI(
    api_key="YOUR_REQUESTY_API_KEY",
    base_url="https://router.requesty.ai/v1",
)

response = client.chat.completions.create(
    model="openai-responses/gpt-5-pro",
    messages=[
        {"role": "user", "content": "Explain quantum computing in one paragraph."},
    ],
)

print(response.choices[0].message.content)

Other OpenAI Responses models

gpt-5.5
1.1M ctx$5.00/1M
gpt-5.5-pro
1.1M ctx$30.00/1M
gpt-5.4-mini
400K ctx$0.75/1M
gpt-5.3-chat
128K ctx$1.75/1M
gpt-5.4-nano
400K ctx$0.20/1M
gpt-5.4
1.1M ctx$2.50/1M
SWE-Bench 82%

Frequently asked questions

How much does gpt-5-pro cost?
gpt-5-pro is priced at $15.00 per million input tokens and $120.00 per million output tokens when accessed via Requesty. Requesty charges exactly what the upstream provider charges — we don't add markup.
What is the context window of gpt-5-pro?
gpt-5-pro has a context window of 400K tokens, with a maximum output of 272K tokens per response. That's roughly 533 words of input you can fit in a single prompt.
What can gpt-5-pro do?
gpt-5-pro supports vision input, tool calling, extended reasoning. You can call it through any OpenAI-compatible client by pointing base_url to Requesty.
How do I use gpt-5-pro with the OpenAI SDK?
Install the OpenAI SDK, set base_url to "https://router.requesty.ai/v1", set your API key to your Requesty key, and set the model to "openai-responses/gpt-5-pro". The Quickstart above shows Python, JavaScript and cURL snippets.

Access gpt-5-pro through Requesty

One API key, 400+ models, OpenAI-compatible. No markup on provider prices, automatic failover, and smart caching built-in.

Get started freeAll OpenAI Responses models