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gpt-4.1

GPT-4.1 is a flagship large language model optimized for advanced instruction following, real-world software engineering, and long-context reasoning. It supports a 1 million token context window and outperforms GPT-4o and GPT-4.5 across coding (54.6% SWE-bench Verified), instruction compliance (87.4% IFEval), and multimodal understanding benchmarks. It is tuned for precise code diffs, agent reliability, and high recall in large document contexts, making it ideal for agents, IDE tooling, and enterprise knowledge retrieval.

VisionTool callingCachingJSON schema
CompareDocs

Specifications

Context window1.0M tokens
Max output33K tokens
API typechat
AddedApr 14, 2025
Model IDazure/gpt-4.1@westus3
Data retentionNo
Used for trainingNo
Provider location🇺🇸 US / 🇪🇺 EU
Privacy policyMicrosoft Privacy Statement→

Benchmarks

Released 2025-04-14
GPQA Diamondreasoning
66.6%

Graduate-level physics, chemistry & biology questions designed to resist Googling.

Intelligence Indexreasoning
19.4%

Artificial Analysis Intelligence Index — a composite of multiple evaluations measuring overall model capability.

Scores are sourced from official model cards, Artificial Analysis, and public leaderboards. Benchmarks measure specific skills and do not capture every aspect of model quality. Always test on your own workload.

Pricing

Input / 1M
$2.00
Output / 1M
$8.00
Cache write
N/A
Cache read / 1M
$0.50
Estimated cost
100K input + 10K output$0.28
1M input + 100K output$2.80
10M input + 1M output$28.00

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 azure/gpt-4.1@westus3.

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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="azure/gpt-4.1@westus3",
    messages=[
        {"role": "user", "content": "Explain quantum computing in one paragraph."},
    ],
)

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

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Frequently asked questions

How much does gpt-4.1 cost?
gpt-4.1 is priced at $2.00 per million input tokens and $8.00 per million output tokens when accessed via Requesty. Prompt caching is supported, which can cut effective input cost by up to 90% on repeated context. Requesty charges exactly what the upstream provider charges, we don't add markup.
What is the context window of gpt-4.1?
gpt-4.1 has a context window of 1.0M tokens, with a maximum output of 33K tokens per response. That's roughly 1,397 words of input you can fit in a single prompt.
How does gpt-4.1 perform on benchmarks?
gpt-4.1 scores 80.6% on MMLU Pro, 66.6% on GPQA Diamond, 47.1% on τ²-Bench. See the full benchmark chart above for results across MMLU Pro, GPQA Diamond, SWE-Bench Verified, HumanEval, MATH, AIME, MMMU, and LiveBench.
What can gpt-4.1 do?
gpt-4.1 supports vision input, tool calling, prompt caching, structured outputs (JSON schema). You can call it through any OpenAI-compatible client by pointing base_url to Requesty.
How do I use gpt-4.1 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 "azure/gpt-4.1@westus3". The Quickstart above shows Python, JavaScript and cURL snippets.
Can I run gpt-4.1 through Requesty?
Yes. gpt-4.1 runs through Requesty's OpenAI-compatible API, served from Microsoft Azure AI in westus3. You do not host the model yourself: point base_url at Requesty, set the model to "azure/gpt-4.1@westus3", and requests are routed to the upstream provider with automatic failover. The same key gives you 400+ other models too.
What region is this deployment?
This variant of gpt-4.1 is deployed in westus3. Region-specific endpoints matter for data residency, latency to your users, and compliance requirements (GDPR, HIPAA). Other regions for the same model may be listed on the Microsoft Azure AI provider page.

Access gpt-4.1 through Requesty

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

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