OpenAI GPT-4.1: the smartest non-reasoning model. Features a 1M context window, predicted outputs, and top-tier coding performance.
Capabilities, design details, and architectural traits
OpenAI's official label for GPT 4.1 on the model page is "Smartest non-reasoning model". It is positioned as the highest-intelligence option in the GPT series that produces responses without a reasoning step, making it the non-o-series ceiling for tasks that need low latency, long context, and precise instruction execution. It is available via the API only - it is not in ChatGPT.
| Trait | Detail |
|---|---|
| Context window | 1,047,576 tokens (1M) with documented improved long-context comprehension, not just capacity |
| No reasoning step | Produces output without a chain-of-thought reasoning pass, delivering low latency compared to o-series models |
| API-only distribution | Explicitly not available in ChatGPT; accessible only through the API |
| Predicted outputs | Supported - allows supplying an expected output to speed up responses when the output is mostly known; not available on o3 or o4-mini |
| Fine-tuning | Supported via supervised fine-tuning and direct preference optimization |
| Extraneous code edits | Documented reduction from 9% with GPT 4o to 2% with GPT 4.1 - a named behavioral improvement |
OpenAI documented that GPT 4.1 was trained with direct input from the developer community, optimizing for tasks like agentic software engineering, extracting insights from large documents, and resolving customer requests. The 1M context window is paired with improved comprehension at long range, not just increased token capacity.
Independent evaluations · Artificial Analysis
Evaluate specifications, pricing, and independent benchmark indices
| Model Details | |||
|---|---|---|---|
| General Info | |||
| Provider | OpenAI | Anthropic | Anthropic |
| Release Date | April 14, 2025 | July 24, 2026 | June 9, 2026 |
| Knowledge Cutoff | Jun 2024 | May 2026 | - |
| Context & Limits | |||
| Context Window | 1.0M Best Context Window | 1M | 1M |
| Pricing (per 1M tokens) | |||
| Input Pricing | $2 Best Input Pricing | $5 | $10 |
| Output Pricing | $8 Best Output Pricing | $25 | $50 |
| Modalities | |||
| Inputs | imagetextfile | textimage | textimagefile |
| Outputs | text | text | text |
| Benchmarks (0-100) | |||
| Intelligence Index | 19.6 | 63.1 Best Intelligence Index | 62.1 |
| Coding Index | - | 78.0 Best Coding Index | 76.5 |
| Agentic Index | - | 59.2 Best Agentic Index | 56.6 |
Graduate-level reasoning and expert Q&A evaluation.
Extremely difficult logical reasoning and knowledge.
Logical reasoning over long context windows.
Independent evaluation data provided by Artificial Analysis. To view the latest benchmarks and full details, visit their official site.
