Is GPT-4.1 available on FastMetal?

Not at the moment. GPT-5.6 Sol, from the same lab, is available on the FastMetal API today.

What is the context window of GPT-4.1?

1,047,576 tokens, shared between the prompt and the response.

How does GPT-4.1 rank?

#170 on the public arena's Japanese board (ELO 1,262). Ranks move as the leaderboard is updated.

Back to Models

openai/gpt-4-1

Not Available

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.

4/14/2025

1,047,576 tokens

#170 Text (Japanese)

Specifications

Modalities

Input

image

text

file

Output

text

Supported Parameters

max_tokens

response_format

seed

structured_outputs

temperature

tool_choice

tools

top_p

Max Output Tokens

32,768

Frequently asked questions

Is GPT-4.1 available on FastMetal?: Not at the moment. GPT-5.6 Sol, from the same lab, is available on the FastMetal API today.
What is the context window of GPT-4.1?: 1,047,576 tokens, shared between the prompt and the response.
How does GPT-4.1 rank?: #170 on the public arena's Japanese board (ELO 1,262). Ranks move as the leaderboard is updated.