GPT-4.1 is a text AI model developed by OpenAI.

Is GPT-4.1 open source?

No, GPT-4.1 is a proprietary model with closed weights.

What is GPT-4.1's context window?

GPT-4.1 supports a context window of 1,000,000 tokens.

GPT-4.1

OpenAITEXT Proprietary

Provider: OpenAI
Modality: TEXT
Parameters: —
Context window: 1,000,000 tokens
Weights: Proprietary
Released: 14 Apr 2025

Compare GPT-4.1 with others

GPT-4.1 (April 2025) is a legacy 1M-context text model — cheap and capable, retired from the ChatGPT picker but still on the API for long-document text work.

Best for

Legacy text-only apps needing a 1M-token context
Cheap long-document processing without GPT-5 reasoning
Strong instruction-following at lower cost than GPT-4o

How it compares — and the India angle

Superseded by the GPT-5.4 family — for new builds, GPT-5.4 mini gives better quality at comparable cost.
It does NOT accept image input — use GPT-4o or a GPT-5 model if you need vision.
A legacy choice in mid-2026, not forward-looking; stay on it only to avoid a migration.

Benchmarks

Representative public scores (approximate, higher is better) for relative comparison. Check the provider for the latest official results.

SWE-bench Verified55

How to access

API ~$2 / 1M input, ~$8 / 1M output. Text-only; API-only legacy.

Access GPT-4.1