GPT-4.1
OpenAIPrevious-generation general-purpose instruction-tuned model (April 2025). Strong on HumanEval and real-world coding with 1M token context, but two numerical generations behind by mid-2026; OpenAI's current production line is GPT-5 → 5.2 → 5.4 → 5.5 (April 23, 2026), with GPT-5.5 Pro and 5.5 Instant variants. GPT-4.1 remains available via API and is still used in legacy integrations.
OpenAI GPT-4.1 (+ mini, nano), released Apr 14 2025 as API-first coding/instruct models with 1M-token context. Post-trained instruct (non-reasoning) model, closed/API-only; now behind the GPT-5 line. OpenAI's own announcement page answers HTTP 403 to a plain fetch, so the SWE-bench figure rests on the InfoQ and Helicone write-ups. Verified 2026-08-13 via OpenAI's model docs, TechCrunch and InfoQ.
Openness
1 high confidence- weights
- closed
- data
- closed
- code
- closed
- license
- Proprietary(API-only)
A proprietary OpenAI API model with no weights, data or code released. OpenAI's own model documentation gives the exact context window, 1,047,576 tokens.
- https://developers.openai.com/api/docs/models/gpt-4.1 recorded 2026-08-13
OpenAI's own model page - GPT-4.1 with a 1,047,576 context window, served through the API with no weights, corpus or code offered
- https://techcrunch.com/2025/04/14/openais-new-gpt-4-1-models-focus-on-coding/ recorded 2026-08-13
"OpenAI has launched a new family of models called GPT-4.1. They focus on coding, and are exclusively available through the company's API."
- https://www.infoq.com/news/2025/05/openai-gpt-4-1/ recorded 2026-08-13
GPT-4.1 API release write-up, still live
Adoption
4 low confidenceGPT-4.1 was an API-first developer/coding model (initially not in ChatGPT default), widely adopted as a cheaper GPT-4o replacement and integrated across tooling. No primary per-model usage count disclosed; level 4 reflects broad developer-platform distribution as a major OpenAI API model rather than a verified figure. Treat as directional.
- https://techcrunch.com/2025/04/14/openais-new-gpt-4-1-models-focus-on-coding/ recorded 2026-08-13
GPT-4.1 positioned as the API coding family replacing GPT-4o; no usage or user figure published anywhere on the page
Capability
3 high confidenceA solid non-reasoning coding model at its Apr 2025 release - 54.6% on SWE-bench Verified, 21 points above GPT-4o - but well below the 2026 reasoning frontier (o3 71.7, GPT-5 74.9, Opus 4.8 88.6). Mid-tier, measured against the frontier. OpenAI's own announcement page is not publicly readable, so the headline 54.6% is confirmed on InfoQ and Helicone instead, both of which report it against GPT-4o's 33.2%.
- https://openai.com/index/gpt-4-1/ recorded 2026-06-04
OpenAI primary announcement: GPT-4.1 SWE-bench Verified 54.6% vs GPT-4o 33.2%, 1M-token context (corroborated by InfoQ/TechCrunch). Returns HTTP 403 to a plain fetch.
- https://www.helicone.ai/blog/gpt-4.1-full-developer-guide recorded 2026-08-13
"GPT-4.1 scored 54.6%, far outperforming GPT-4o (33.2%) and GPT-4.5 (28%)" on SWE-bench Verified
- https://www.infoq.com/news/2025/05/openai-gpt-4-1/ recorded 2026-08-13
"GPT-4.1 achieves 54.6% accuracy. This is a 21-point increase over GPT-4o (33.2%) and 26.6 points higher than GPT-4.5."
Verified 2026-08-13