GPT-4.1 API Pricing

As of October 10, 2026, GPT-4.1 costs $2.00 per 1M input tokens and $8.00 per 1M output tokens on OpenAI, with cache reads at $0.50 per 1M tokens. It has a 1,047,576-token context window and returns up to 32,768 tokens per response.

By OpenAIModel ID gpt-4.1Prices updated October 10, 2026Checked October 10, 2026

Input: $2.00 / 1M tokens
Output: $8.00 / 1M tokens
Cache read: $0.50 / 1M tokens
Context window: 1,047,576 tokens
Max output: 32,768 tokens
Providers: 6
Added to LiteLLM: April 2025

GPT-4.1 pricing by provider

13 listings across 6 providers. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

Provider	Model name in LiteLLM	Input	Output	Cache read	Cache write	Batch in	Batch out	Context
OpenAI	`gpt-4.1`	$2.00	$8.00	$0.50	–	$1.00	$4.00	1M
OpenAIsnapshot 2025-04-14	`gpt-4.1-2025-04-14`	$2.00	$8.00	$0.50	–	$1.00	$4.00	1M
OpenAIfine-tuned, snapshot 2025-04-14	`ft:gpt-4.1-2025-04-14`	$3.00	$12.00	$0.75	–	$1.50	$6.00	1M
Azure OpenAI	`azure/gpt-4.1`	$2.00	$8.00	$0.50	–	$1.00	$4.00	1M
Azure OpenAIsnapshot 2025-04-14	`azure/gpt-4.1-2025-04-14`	$2.00	$8.00	$0.50	–	$1.00	$4.00	1M
GitHub Copilot	`github_copilot/gpt-4.1`	–	–	–	–	–	–	128K
GitHub Copilotsnapshot 2025-04-14	`github_copilot/gpt-4.1-2025-04-14`	–	–	–	–	–	–	128K
Replicate	`replicate/openai/gpt-4.1`	$2.00	$8.00	–	–	–	–	–
Snowflake Cortex	`snowflake/openai-gpt-4.1`	$2.00	$8.00	$0.50	–	–	–	300K
Vercel AI Gateway	`vercel_ai_gateway/openai/gpt-4.1`	$2.00	$8.00	$0.50	$0	–	–	1M
Azure OpenAIeu	`azure/eu/gpt-4.1`	$2.20	$8.80	$0.55	–	$1.10	$4.40	–
Azure OpenAIus	`azure/us/gpt-4.1`	$2.20	$8.80	$0.55	–	$1.10	$4.40	–
Azure OpenAIus, snapshot 2025-04-14	`azure/us/gpt-4.1-2025-04-14`	$2.20	$8.80	$0.55	–	$1.10	$4.40	1M

Other GPT-4.1 prices on OpenAI

Priority input	$3.50 per 1M tokens
Priority output	$14.00 per 1M tokens
Web search	$25.00 per 1K searches

What GPT-4.1 costs in practice

1,000 requests with 2,000 input and 500 output tokens each

OpenAI	$8.00
Azure OpenAI	$8.00
Replicate	$8.00
Snowflake Cortex	$8.00
OpenAI batch	$4.00

100 long-document requests with 100,000 input and 2,000 output tokens each

OpenAI	$21.60
Azure OpenAI	$21.60
Replicate	$21.60
Snowflake Cortex	$21.60

GPT-4.1 features

Input: text, image. Output: text.

Function calling
Parallel tool calls
Structured output
Image input
PDF input
Prompt caching
Web search

Use GPT-4.1 with LiteLLM

Call GPT-4.1 through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/chat/completions. LiteLLM tracks the cost of every request at these prices.

Python SDK

from litellm import completion

response = completion(
    model="gpt-4.1",
    messages=[{"role": "user", "content": "Hello!"}],
)

Proxy config.yaml

model_list:
  - model_name: gpt-4.1
    litellm_params:
      model: gpt-4.1
      api_key: os.environ/OPENAI_API_KEY

Call the proxy

curl http://0.0.0.0:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-1234" \
  -d '{
    "model": "gpt-4.1",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

GPT-4.1 FAQ

How much does GPT-4.1 cost?

GPT-4.1 costs $2.00 per 1M input tokens and $8.00 per 1M output tokens on OpenAI, with cache reads at $0.50 per 1M tokens. Batch requests cost $1.00 per 1M input tokens and $4.00 per 1M output tokens.

What is the context window of GPT-4.1?

GPT-4.1 has a 1,047,576-token context window and returns up to 32,768 tokens per response.

Which providers offer GPT-4.1?

GPT-4.1 is available from 6 providers through LiteLLM: OpenAI, Azure OpenAI, GitHub Copilot, Replicate, Snowflake Cortex and Vercel AI Gateway.

How do I call GPT-4.1 with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="gpt-4.1", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

What features does GPT-4.1 support?

GPT-4.1 supports function calling, parallel tool calls, structured output, image input, PDF input, prompt caching and web search.

When did LiteLLM add GPT-4.1?

GPT-4.1 was added to LiteLLM's model price file in April 2025.

Sources

Prices come from LiteLLM's open-source model_prices_and_context_window.json, which LiteLLM uses to calculate the cost of every request. Provider pricing pages:

LiteLLM docs: OpenAI, Azure OpenAI, GitHub Copilot, Replicate, Snowflake Cortex, Vercel AI Gateway.

Provider pages: OpenAI, Azure OpenAI, GitHub Copilot, Replicate, Snowflake Cortex, Vercel AI Gateway.