GPT-4.1 nano
GPT-4.1 nano is an API-only (closed weights) language model from OpenAI, released April 14, 2025. The context window is 1M tokens. On the Epoch Capabilities Index it scores 126.8, rank 168 of 256 rated models. API price: $0.1 input / $0.4 output per million tokens.
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Lab
OpenAI
Released
April 14, 2025
Weights
API-only (closed weights)
Parameters
–
Context
1M
Price / M tokens
$0.1 / $0.4 in / out
Epoch ECI
126.8 #168
Strengths by category
ModelTape's 0–100 fit on Epoch AI benchmark results.
| Category | Score | Based on |
|---|---|---|
| Math | 19.1 | MATH level 5, OTIS Mock AIME 2024-2025, FrontierMath-2025-02-28-Private |
| Knowledge | 31.1 | GPQA diamond, SimpleQA Verified |
Benchmark results
| Benchmark (Epoch AI) | Score |
|---|---|
| MATH level 5 | 70.0% |
| GPQA Diamond | 33.2% |
| OTIS Mock AIME | 28.8% |
| Aider Polyglot | 8.9% |
| SimpleQA Verified | 6.0% |
| FrontierMath-2025-02-28-Private | 1.8% |
| Chess Puzzles | 0.0% |
Links
Models with a similar score
Gemini 1.5 Pro (Sept 2024) · Claude 3.5 Sonnet · Grok-2 (Dec 2024) · Phi-4 · GPT-4o (Nov 2024) · GPT-4o (May 2024) · Llama 3.1-405B · Llama 4 Scout
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