GPT-4.1
Summary
GPT-4.1 is a proprietary language model from OpenAI, released on 14 Apr 2025. It accepts text, images and PDFs and generates text, with a 1M-token context window and up to 33K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $2 per million input tokens and $8 per million output tokens (OpenAI API), across 4 providers we track.
Long-lived GPT workhorse for coding, instruction following, and production apps
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | OpenAI |
|---|---|
| Release date | 14 Apr 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 1M (1,047,576 tokens) [models.dev] |
| Max output | 33K tokens [models.dev] |
| Knowledge cutoff | Apr 2024 [models.dev] |
| Input | Text, images and PDFs [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | No [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
GPT-4.1 API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenAI API gpt-4.1 | $2 | $8 | $0.50 | 1M | models.dev, 4 Oct 2026 |
| Vercel AI Gateway openai/gpt-4.1 | $2 | $8 | $0.50 | 1M | models.dev, 4 Oct 2026 |
| OpenRouter openai/gpt-4.1 | $2 | $8 | $0.50 | 1M | OpenRouter, 4 Oct 2026 |
| Vercel AI Gateway openai/gpt-4.1-fast | $3.50 | $14 | $0.88 | 1M | models.dev, 4 Oct 2026 |
| Snowflake Cortex openai-gpt-4.1 | – | – | – | 128K | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of GPT-4.1?
GPT-4.1 has a context window of 1,047,576 tokens (1M) and can generate up to 32,768 tokens in a single response, according to models.dev.
How much does the GPT-4.1 API cost?
Through OpenAI API, GPT-4.1 costs $2 per million input tokens and $8 per million output tokens. Prices last verified 4 Oct 2026.
Is GPT-4.1 open source?
No. GPT-4.1 is a proprietary model; OpenAI has not released its weights. It is available through APIs including OpenAI API, Vercel AI Gateway, OpenRouter, Snowflake Cortex.
When was GPT-4.1 released?
OpenAI released GPT-4.1 on 14 Apr 2025, according to models.dev.
Which providers offer GPT-4.1?
We track GPT-4.1 on 4 providers: OpenAI API, Vercel AI Gateway, OpenRouter, Snowflake Cortex.
Change history
No changes detected since we started tracking this model. We re-check every source daily.
Sources
- https://github.com/sst/models.dev/blob/dev/providers/openai/models/gpt-4.1.toml
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/gpt-4.1.toml
- https://openrouter.ai/openai/gpt-4.1
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/gpt-4.1-fast.toml
- https://github.com/sst/models.dev/blob/dev/providers/snowflake-cortex/models/openai-gpt-4.1.toml